United States          Region 8              EPA-908/2-80-001
Environmental Protection     1860 Lincoln Street         October, 1980
Agency            _J}*nver, Colorado 80295

Surveillance and Analysis Division Data Analysis Branch




Water


Quality Trends  in


Region VIII





1979  Data

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EPA - 908/2-80001 U.S. Environmental Protection gency
WATER QUALITY TRENDS
IN REGION VIII
(1979 DATA)
Data Analysis Branch
Surveillance and Analysis Division
Denver, Colorado
October 1980

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D ISCLAIHER
This report has been reviewed by the Surveillance and Analysis
Division, U.S. Environmental Protection Agency Region VIII, and approved
for publication. Mention of trade names or commercial products does not
constitute endorsement or recommendation for use.
Document is available to the public through the flational Technical
Information Service, Springfield, Virginia 22161.

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ABSTRACT
Water quality trends and status for the calendar year 1979 were
determined for the six states in Region VIII. These states include Colorado,
Montana, North Dakota, South Dakota, Utah and Wyoming. Data resident in the
EPA national data bank (STORET) were analyzed.
Statistical tests which detect significant differences between two
populations were utilized to show trends in water quality. The status and
severity of stream pollutants were determined by comparing observed parameter
concentrations to state Water Quality Standards or recognized criteria.
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Abstract
Table of Contents
List of Figures
List of Tables
TABLE OF CONTENTS
SECTION I
Page
i
ii
iv
V
Introduction
Summary and Conclusions.
Analytical Procedures.
Water Quality Standards.
3
4
6
1.1
SECTION II
REGIONAL WATER QUALITY SUMMARY
Regional Overview of Water Quality
A Sun nary of Parameter Groups Significantly
Exceeding Criteria
Fecal Coliform Bacteria
Nitrogen
Phosphorus
Total Dissolved Solids (TDS)
Suspended Sediment
Trace Elements
Un-ionized Ammonia
17
17
18
20
22
24
26
28
30
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SECTION III
Page
STATE WATER QUALITY REPORTS 32
Colorado
Montana
North Dakota
South Dakota 85
Utah 98
Wyoming 108
APPENDIX
State Water Quality Standards or Other Criteria Used
in the Stream Quality Analysis 123
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LIST OF FIGURES
Figures Page
1. Stations where Fecal Coliform Bacteria concentrations were at
least 85 percent higher than standards for at least one month
during 1979 19
2. Stations where Nitrogen concentrations were at least 85
percent higher than standards/criteria for at least one month
979 21
3. Stations where Phosphorus concentrations were at least 85
percent higher than criteria for at least one month during
1979 23
4. Stations where Total Dissolved Solids concentrations were at
least 85 percent higher than criteria for one month during
1979 25
5. Stations where Suspended Sediment concentrations were at
least 85 percent higher than standards/criteria for one month
or more during 1979 27
6. Stations where one or more observed Cyanide or Trace Element
concentrations were detected to be at least 85 percent higher
than standards/criteria 29
iv

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LIST OF TABLES
Table Page
COLORADO
1. Ranking of Critical Water Quality Stations by
Pollutant Group 33
2. Table of Stations where Water Quality Concentrations
Exceed Criteria 35
3. Water Quality Trend Table 54
MONTANA
4. Ranking of Critical Water Quality Stations by
Pollutant Group 59
5. Table of Stations where Water Quality Concentrations
Exceed Criteria 61
6. Water Quality Trend Table 74
NORTH DAKOTA
7. Ranking of Critical Water Quality Stations by
Pollutant Group 77
8. Table of Stations where Water Quality Concentrations
Exceed Criteria 79
9. Water Quality Trend Table 83
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LIST OF TABLES (CONTINUED)
Table Page
SOUTH DAKOTA
10. Ranking of Critical Water Quality Stations by
Pollutant Group 85
11. Table of Stations where Water Quality Concentrations
Exceed Criteria 87
12. Water Quality Trend Table. . . . 96
UTAH
13. Ranking of Critical Water Quality Stations by
Pollutant Group 98
14. Table of Stations where Water Quality Concentrations
Exceed Criteria 100
15. Water Quality Trend Table 107
WYOMING
16. Ranking of Critical Water Quality Stations by
Pollutant Group 108
17. Table of Stations where Water Quality Concentrations
Exceed Criteria 110
18. Water Quality Trend Table 120
vi

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SECTION
1

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2

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INTRODUCTION
Water quality monitoring activities have increased substantially in
Region VIII over the past few years both in scope and frequency. These
increases are due to public demand for accurate information about harmful
pollutants in the environment and to the passage of Federal Legislation,
namely, the Clean Water Act, 1979. To fulfill the requirements of these
legislative mandates Federal and State agencies have planned and developed
extensive monitoring networks which have generated a mass of environmental
quality data.
The purpose of this report is to present useful analytical summaries for
Region VIII of the Environmental Protection Agency utilizing environmental
quality data resident in the water data storage and retrieval system
(STORET). Quality status and trends for streams have been determined from
observed measurements over successive time periods.
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SUMMARY AND CONCLUSIONS
Trend analyses (19751978 vs. 1979) of all pertinent water quality data
available in the STORET system for Region VIII indicates that 305 of 774
stations processed experienced significant changes (improvement or
degradation) for at least one parameter group. Of those stations which
exhibited significant trends and which were also found to have concentrations
generally considered at critical levels during the period 1975-78, 131 were
found to have improved and 232 were found to have degraded.
The changes in quality that could be mostly attributed to the affects of
man, as indicated by the stations where high fecal coliform bacteria
concentrations are present, were observed at the stations listed below:
Significant Degradation
Arkansas R nr Nepesta, CO
Uncompahagre R at Delta, CO
Arikaree R nr Wray, CO
Left Hand Cr nr Niwot, CO
Boulder Cr at Boulder - Weld County Line, CO
Big Sioux R nr Canton, SD
Big Sioux R nr Hudson, SD
Colorado R at Lees Ferry, AZ
4

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Significant Improvement
Missouri R nr Schmidt, ND
Big Sioux R abv Watertown, SD
N Platte R biw Casper, WY
For the non-point sources of pollution, where total dissolved solids
concentrations have been determined to be at critical levels, degradation
occurred at 34 stations in the region and improvements were noted at 20 stations.
The section of this report entitled Regional Sunniary discusses in more
detail the findings with regard to specific pollutant groups.
5

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ANALYTICAL PROCEDURES
Water quality data (19751979) for 885 active monitoring stations in the
six States of Region VIII were retrieved from STORET (EPAs computerized water
quality data base) and screened through computerized trending techniques.
Forty-six STORET water quality parameters which fall in the general categories
of bacteria, nutrients, dissolved solids, suspended solids, aesthetics, and
inorganic toxicants were selected for this trend study and were analyzed in a
two step process. First, to describe pollution severity, each observed water
quality observation was compared to a state standard or criterion and averaged
on a monthly basis. The ratio of the number of criteria exceedences to the
total number of observations resulted in a probability of exceedence statistic
for each parameter. Ranking of the critical stations could then be
accomplished by selecting the highest statistical values. Secondly, to
determine pollution trends, the 15th, 50th (median) and 85th percentile values
for two time periods were compared for each parameter with sufficient data. A
standard statistical test, requiring at least six observations for a parameter
in each time period was used to test for a significant difference between the
two time periods. Significant changes in the 50th percentile measurements are
generally indicative of overall changes in concentrations, while significant
changes in the 85th percentile measurement (15th percentile for dissolved
oxygen) are generally indicative of changes during critical periods. The
procedures for determining improvement or degradation is described in the
trend analysis section.
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Severity Analysis
Each observed data value was compared to its respective water quality
standard or to some recognized criterion based on water quality use. The
standards or criteria used in the analysis are included in the appendix. Only
the data values that were higher than standards/criteria levels were
reported. The Table of Stations where Water Quality Concentrations Exceed
Criteria contains the symbolic representation of those values that were
categorized between standard and 15 percent over, 15-85 percent above, and
greater than 85 percent above the standards/criteria levels. Also, included
in the tables is the probability of exceedence statistic which is a function
of the frequency of criteria violations.
Trend Analysis
The statistical test (The Median Test, Practical Nonparametric
Statistics , W.J. Conover, John Wiley & Sons, Inc., New York, 1971, pages
167-172.) that was used to analyze water quality trends is a nonparametric
technique for testing the hypothesis that random samples from two or more
populations have the same median. The test is a special application of a
chi-square contingency table test with fixed marginal totals. The same test
can be used against other percentiles than the 50th but the discussion here
describes only the median.
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Given k populations each with a random sample of size n 1 , i=1,2---k, a
test statistic can be constructed to test the hypothesis:
H 0 : all k populations have the same median.
HA: at least two populations have different medians.
The test statistic is computed from the 2xk contingency table:
Sample
1
2
3
. .  k
Total
Median*
Median*
Oil
021
012
022
013
023
. .  lk
2k
a
b
Total
n 1
n 2
n 3
. . . nk
N
( n a\2
ab
* Refers to overall median of the combined samples.
8

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The test for the statistic assumes:
The samples are random.
The samples are independent of each other.
The measuremeit scale is ordinal.
If all populations have the same median, they have the same
probability of an observation exceeding the median.
A large sample approximation is used to approximate T. The critical
region of approximate size d corresponds to values of T greater than x 1 
the (1-a) quantile of a chisquare random variable with ki degrees of
freedom. If I exceeas x reject Ho; otherwise accept H 0 . The author
notes that the approximation may not be satisfactory if more than 20% of the
n are less than 10, or if any of the n are less than 2. It further
qualifies this rule of thumb for larger numbers of samples k.
The test was applied to each pollutant parameter at every station in the
Region not only for the median but also the 15th, and 85th percentiles. Data
observed during the years 1975 through 1977 comprise one test population and
data from the year 1978 made up the other population. Each sample was
required to have at least six observations. This technique made it possible
to detect statistically significant differences between the two time periods.
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The following procedures were used to determine if the observed
significant differences represented an improvement or a degradation:
Examine the 15th and 50th percentile for dissolved oxygen - for all
other parameters examine the 85th and 50th percentile.
If a significant difference between two time periods for either of
the percentile statistics exists and both percentile statistics
decrease from the first time period to the second, designate this as
improvement. (For oxygen this is a degradation).
If a significant difference between two time periods for either of
the percentile statistics exists and both percentile statistics
increase from the first time period to the second, designate this as
degradation. (For dissolved oxygen this is an improvement).
It was assumed that the samples were random and independent of one
another. Given that these data are time series data, taken at irregular
intervals, affected by seasonal cycles, etc., certain modifications of this
technique might be advisable in future applications.
10

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WATER QUALITY STANDARDS
Section 303(c) of the Clean Water Act and attendant regulations and
guidelines require states to review and revise their water quality standards
at least once every three years. Water quality standards are an essential
part of the State water quality management program. State water quality
standards:
o Publicly define the States water quality objectives, and hence
form the basis of State and Areawide 208 planning and State Program
Plan s;
o Serve as the basis for determining National Pollution Discharge
Elimination System (NPDES) permit effluent limitation for pollutants
not specifically addressed in the effluent guidelines, or secondary
treatment standards or for pollutants for which effluent guidelines
are not stringent enough to protect desired uses;
o Serve as a basis for judgement in other water quality related programs
including the priority system for Section 201 Construction Grants,
water quality inventories, control of toxic substances, thermal
discharges, and dre 1ge and fill activities;
11

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o Serve as a basis for evaluating and, where necessary, modifying
best management practices for control of nonpoint sources;
o Contain the States antidegradation policy.
State water quality standards consists of three basic elements. These are
designated beneficial use(s), criteria which are numeric and narrative, and an
antidegradation policy.
States are encouraged to classify all surface waters for existing and
potential future beneficial uses. Beneficial uses can include drinking water
supply, navigation, agricultural, industrial, recreation and aquatic and
terrestrial life protection. The U.S. Environmental Protection Agency
strongly encourages states to c1assify all surface waters for aquatic life use
and recreation in and on the water, wherever attainable.
Water quality standards contain the States policy on aritidegradation.
Antidegradation policies indicate that:
o Existing instream beneficial uses must be maintained and protected;
o Existing high quality water must be maintained at existing high
quality unless the State decides to allow limited degradation where
economically or socially justified. If limited degradation is
allowed, it cannot result in violation of water quality criteria which
describe the base levels necessary to sustain the national water
quality goal of protection and propagation of fish, shellfish and
wildlife and recreation in and on the water;
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o In all cases, water which constitute an outstanding national resource
must be maintained and protected.
Water quality criteria specify concentrations of water constituents
which, if not exceeded, are expected to support the applicable use designation
to which a stream or lake is assigned. Such criteria are derived from
scientific data obtained from laboratory or in situ observations which depict
an organisms responses to a defined stimulus or material under identifiable or
regulated environmental conditions for a specified time period. They are
intended not only to protect essential and significant life in water, as well
as the direct users of water, but also to protect life that is dependent on
life in water for its existence, or that may consume intentionally or
unintentionally any edible portion of such life.
The water quality criteria used to develop this report derive from
several sources, the principal source being the State water quality
standards. In these cases where existing State water quality standards were
parametrically limited, other criteria references were utilized and are
identified as such within this report (see Appendix). These criteria
references include the Red Book, Blue Book, Green Book, Drinking Water
Regulations and the draft criteria document for the 65 NRDC Toxics. It should
be noted that the values extracted from those references are only guidelines
and cannot be considered as standards. They simply provide a point of
reference about which the relative water quality for a particular station or
change therein can be judged. An exceedence of a criterion should not be
13

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construed to imply that a given beneficial use is being impaired. This type
of demonstration can only be accomplished through intensive investigations.
Conversely, some States have, through intensive research, established water
quality standards for certain parameters which require levels lower than those
used in this report. This is especially true of nutrients. The values for
the nitrogen and phosphorus series used in the report are only very rough
approximations of the conditions which might be indicative of a nutrient
enriched environment. The U.S. Environmental Protection Agency strongly
advocates the use of site-specific limnological surveys to establish nutrient
standards.
The criteria for public water supplies derive from the Interim Primary
Drinking Water Regulations. These regulations indicate that the criteria
apply at the end of the tap. This report has, however, used them to
approximate the quality of raw water sources classified as public water
supplies.
14

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SECTION II
REGIONAL WATER QUALITY SUMMARY
15

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16

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REGIONAL OVERVIEW OF WATER QUALITY
A Summary of Parameter Groups Significantly Exceeding Criteria
The regional map displays that appear in this section describe the more
significant problem areas identified through computer analysis of each
parameter group for monitoring stations with 1979 data. The observed data
were compared to State water quality standards or recognized criteria and if
the values were greater than standards/criteria then the probability of
exceedence was calculated and reported. The maps illustrate where
concentrations exceeded standards/criteria by more than 85 percent for at
least one month during 1979. These maps were generated from the Table of
Stations where Water Quality Concentrations Exceed Criteria in the section
titled, State Reports. It should be recognized that even though problems
may exist in areas where insufficient data were collected, no problem
condition was reported. Since few occurrences of a critical nature were noted
for dissolved oxygen, no maps are presented to describe this group.
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Fecal Coliform Bacteria
The map on the facing sheet illustrates the general locations of the
water quality monitoring stations contained in the Table of Stations where
Water Quality Concentrations Exceeds Criteria .
Below are listed the ten most critical stations in the region for fecal
coliform bacteria concentrations. Values for the States of Montana and Utah
were based on USGS data only.
Exceedence
Probability
1. Whitewood Cr nr Deadwood, SD 1.00
2. Goose Cr nr Sheridan, WY 1.00
3. Bitter Cr nr Kanda, WY 1.00
4. White R nr Kadoka, SD 1.00
5. Cheyenne R nr Plainview, SD 1.00
6. Killpecker Cr nr Rock Springs, WY 0.88
7. Rapid Cr blw Rapid City, SD 0.71
8. Cache La Poudre R nr Greeley, CO 0.70
9. Big Sioux R nr Akron, IA 0.69
10. Hams Fork R nr Diamondville, WY 0.67
18

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Figure 1.
Stations where Fecal Coliform Bacteria concentrations were at least
85 percent higher than Standards for one month or more during 1979.
19

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Ni trogen
The Table of Stations where Water Quality Concentrations Exceed Criteria
contains the nitrogen category which is made up predominately of total
nitrogen and some observed concentrations of the Nitrites and Nitrates. It
appears that a larger percentage of the high nitrogen concentrations occurred
in the States of Montana and North Dakota during the months of March and April.
Below are the ten stations that had the highest probability of exceedence
on the basis of four consecutive monthly observations or more:
Exceedence
Probability
1. West Parrot Cr nr Roundup, MT 1.00
2. Red R of the North at Halstad, ND 1.00
3. Fountain Cr biw Colorado Springs, CO 1.00
4. South Platte R nr Kersey, CO 1.00
5. Sheyenne R nr Kindred, ND 0.96
6. Arkansas R nr Avondale, CO 0.93
7. Souris R nr Westhope, ND 0.92
8. South Platte R at Henderson, CO 0.90
9. South Platte R nr Greeley, CO 0.88
10. Powder R at Moorhead, MT 0.75
20

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Fiqure 2.
Stations where Nitrogen concentrations were at least 85 percent higher
than Standards for one month or more during 1979.
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Phosphorus
The map illustrates the widespread occurrence of phosphorus contributed
to streams from natural sources. The areal extent of phosphorus generally
describes where the sedimentary formations are found in the region. Major
contributions occur during the month of April at the start of the snowmelt and
runoff period. When phosphorus in streams combine with nitrogen it presents a
potential hazard to the trophic status of many reservoirs in the region.
Below are listed the stations with the highest probability of exceedence
and the highest average phosphorus concentrations:
Exceedence Average
Probability Conc/Criteria
1. 1.00 34.0
2. 1.00 28.9
3. 1.00 28.2
4. 1.00 12.3
5. 1.00 12.0+
6. 1.00 8.5
7. 0.95 8.4
8. 1.00 7.7
9. 1.00 7.3
10. 1.00 5.9
South Platte R at 88th Ave., Denver, CO
South Platte R at Henderson, CO
Kilipecker Cr at Rock Springs, WY
Boulder Cr at Boulder-Weld County Line
Big Sioux R - Brandon to Richland, SD
South Platte R nr Kersey, CO
Cache La Poudre R nr Greeley, CO
Big Sioux R at Akron, IA
Rapid Cr nr Farmingdale, SD
South Platte R at 66th Ave., Denver, CO
22

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-

 
 ( A
I  c :.. AK \ 4
\7 MOUTANA
w it ri -
,Ir 1!i11!i3 
L ..< \
w: I
I i.
aoco
w , 
r . r._-______
.
 fltt
  
j U T A H II .  ,
     - 5  CQ
  COLLORADD

__ __ _.1
Figure 3. Stations where Phosphorus concentrations were at least 85 percent higher
than criteria for one month or nore during 1979.
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Total Dissolved Solids (TDS )
Most of the streams in the region originate in the high mountain areas
where the underlying formations are of igneous origin. Here the
concentrations of TOS can be expected to be less than 50 mg/l but as soon as
the river enters in its descent the sedimentary formations the pickup of salts
increases substantially. The map on the facing page illustrates where
concentrations over 900 mg/l were observed.
The ten most critical stations as determined by high concentrations and
occurrences are listed below:
Exceedence Average
Probability Conc. rrig/l
1. Bitter Cr nr Bonanza, UT 1.00 12576
2. Salt Cr nr Sussex, WY 1.00 4274
3. Otter Cr nr Otter, MT 1.00 5085
4. Bitter Cr nr Salt Wells, WY 1.00 3671
5. Beaver Cr nr Newcastle, WY 1.00 3430
6. Hanging Woman Cr blw Horse Cr, MT 1.00 5055
7. Cucharas R blw Walsenburg, CO 1.00 5212
8. McElmo Cr at CO-UT Line 1.00 2442
9. Redwater R at Circle, MT 0.92 3123
10. Cheyenne R at Edgemont, SD 0.75 3648
24

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.,
ctI.ov,
S S
MO NTA NA
WtIS CIT / 
.. .   -- S
.
-
- ----- -.-:: -- S
 0

,j 
f*\J )
.r  N   . .
I . .r.u/
11/ ,,->. S
WOMI
\.___ 5 3
/JC fl
I ) Th cu co
I )
-
  S 
/  .


 - (
I -Cr S __.RA,
I I  l /,_ __, /_;
U
\__,. ( i -;
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i-i:
,!
,_-,- -  - -- , - rS   L 
OTIT Hk 0 A
 i \,.
 . *-. \
 - - ----,
r . 4
H
Figure 4. Stations where Total Dissolved Solids concentrations were at least
85 percent higher than criteria for one month or more during 1979.
25

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Suspended Sediment
Characteristically, the locations with high concentrations of suspended
sediments are also those locations where high total dissolved solids
concentrations occur. The Table of Stations where Water Quality
Concentrations Exceed Criteria illustrates that high suspended solids occur
during high streamflow conditions and high TDS concentrations generally occur
during the low streamflow conditions.
The stations in the region that exhibit the highest values for suspended
sediments are:
Exceedence Average
Probability Conc. mg/l
1. San Juan R nr Shiprock, NM 1.00 5877
2. Salt Wells Cr nr Salt Wells, WY 1.00 11070
3. San Juan R nr Bluff, UT 0.92 5268
4. Green R at Green River, UT 0.92 5264
5. White R at Oacoma, SD 0.78 7077
6. Powder R at Moorhead, MT 1.00 4057
7. San Juan R at Four Corners 1.00 3049
8. Muddy Cr nr I-1anskville, UT 1.00 6130
9. Muster Cr at Kinsey, MT 1.00 6700
10. Powder R at Sussex, WY 1.00 1547
26

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___ - -
.1-
AK
4 . 1 H o
M 0 N T A N A    . 
__.c.. ,, ., 
 , , - S--
I. s,c
<1 1  $ 

I  /
OMEN
& 
.
r,J . k P \
   c *
. C 4
L. is_!_._-. . II
VIPWAt. 7 I

t 
UTAH
 . S.
/ a.t
tJ
1-S___________
Figure 5. Stations where Suspended Sediment concentrations were at least
85 percent higher than criteria for one rronth or more during 1979.
27

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Trace Elements
During 1979, a few trace element concentrations exceeding criteria were
detected in the region. Those stations where the highest values were
determined are as follows:
Animas R nr Silverton, CO (Cu, Zn)
Clear Cr abv Golden, CO (Cu, Zn)
Arkansas R blw Leadville, CO (Zn)
Jordan R at 1700 S, SLC, UT (Hg
Refer to the Table of Stations where Water Quality Concentrations Exceed
Criteria in the section entitled State Reports for additional stations where
high values were noted.
28

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Figure 6. Stations where one or more observed Cyanide or Trace Element
concentrations were detected to be at least 85 percent higher
than Standards/criteria.
29

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Unionized Ammonia
Water Quality Indicator values for un-ionized ammonia were determined at
each station where the STORET parameters of total ammonia (NH 3 -N),
temperature,and pH were observed for the same water sample. The calculation
procedure is described in William T. Willinghams 1976 report, Ammonia
Toxicity.
The following stations exhibited ammonia concentrations at high levels
for at least two months of the year in 1979:
Fountain Cr biw Colorado Springs, CO
South Platte R at Henderson, CO
Whitewood Cr at Pluma, CO
Dolores R nr Cisco, UT
Jordan R at 1700 So., SLC, UT
30

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31

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STATE WATER QUALITY REPORTS
This section is comprised of three major tables. The table, Ranking of
Critical Water Quality Statins by Pollutant Group is a summary of stations
where parameter concentrations and frequency of occurrences were highest.
The Table of Stations where Water Quality Concentrations Exceed Criteria
lists those stations where water quality parameters, arranged by groups, were
noted to be at three levels above the standards/criteria norm, namely:
standards/criteria to 15 percent above, 15-85 percent above standard/criteria,
and greater than 85 percent above standard/criteria.
The Water Quality Trend Table lists stations where parameter groups
exhibited significant changes over time as determined by statistical tests.
This table shows quality improvement or degradation in each parameter group
and points out those groups which are at or approaching critical levels. Data
for 1975, 1976, 1977, and 1978 were trerided against data for 1979 in
determining this table.
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coLo 
Table 1. Ranking of Critical Water Quality Stations by Pollutant Group
No. Avg.
Exceed. Mos. Conc.
Fecal Coliform Prob. Excd mg/i
1. Cache La Poudre R nr Greeley 0.70 10 16879
2. Arkansas R nr Nepesta 6.45 7 20239
3. St Vram Cr blw Longmont 0.62 8 7355
4. S Platte R at Henderson 0.45 7 10879
5. Boulder Cr at Boulder - Weld
Coui ty Line 0.60 7 6317
6. S Platte R nr Kersey 0.62 9 2523
7. Little Thompson nr Mllliken 0.52 9 1927
8. Clear Cr biw Idaho Springs 0.50 4 2800
9. Left Hand Cr nr Niwot 0.60 3 2268
10. Huerfano R at Hwy 85 0.50 3 1559
Nitrogen
1. Fountain Cr biw Colorado
Springs 1.00 5 0.34
2. Arkansas R nr Avondale 0.93 6 0.27
3. S Platte R nr Kersey 1.00 5 0.14
4. Indian Cr nr Sargents 1.00 2 0.30
5. Cache La Poudre nr Greeley 0.88 5 0.12
6. 5 Platte R at Henderson 0.90 5 0.11
7. Fountain Cr nr Plnon 0.75 3 0.12
8. St Vram Cr biw Longmont 0.63 4 0.10
9. Clear Cr nr Mouth 0.67 4 0.09
10. S Platte R biw Ft Morgan 1.00 2 0.09
Phosphorus
1. S Platte R at Henderson 1.00 12 2.89
2. Fountain Cr biw Colorado
Springs 1.00 11 3.06
3. Boulder Cr at Boulder -
Weld County Line 1.00 12 1:24
4. S Platte R - 60th Avenue
Denver to Julesburg 1.00 12t 0.85
5. St Vram Cr blw Longmont 1.00 10 0.68
6. Big Thompson R nr Mouth 1.00 12 0.49
7. Arkansas R - Nepesta to
La Junta 1.00 8 0.43
8. Williams Fork at Mouth 1.00 3 0.76
9. McElmo Cr nr CO-UT Line 1.00 3 0.75
10. Monument Cr at Pikeview 1.00 2 0.51
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Table 1 (Continued). Ranking of Critical Water Quality Stations
by Pollutant Group
No. Avg.
Exceed. Mos. Conc.
Dissolved Solids Prob. Excd mg/l
1. Arkansas R - La Junta to
Coolidge, KS 1.00 10 3530
2. Cucharas R biw Walsenburg 1.00 6 5212
3. McElmo Cr nr CO-UT Line 1.00 12 2442
4. Purgatoire R nr Las Animas 1.00 6 3907
5. S Platte R - Kersey to
Julesburg 1.00 12 1850
6. Yellow Cr nr White River 1.00 10 3660
7. Adobe Cr nr Fruita 1.00 4 2344
8. Bijou Cr nr Ft Morgan 1.00 9 1237
9. Mancos R nr CO-NM Line 1.00 10 1890
10. Piceance Cr at White River 1.00 12 1392
Suspended Sediments
1. San Juan R at Shiprock, NM 1.00 12 5878
2. San Juan R at Four Corners 1.00 10 3049
3. Arkansas R nr Coolidge, KS 0.79 7 2084
4. McElmo Cr nr COUT Line 0.83 10 1411
5. White R nr CO-UT Line 0.88 5 1785
6. Little Snake R nr Lily 0.69 10 1126
7. White R abv Rangely 0.75 7 897
Trace Elements
1. Anlmas R nr Silverton 0.58 5 (Cu)
2. Animas R nr Silverton 0.92 7 (Zn)
3. Clear Cr biw Idaho Springs 0.83 5 (Cu)
4. Clear Cr abv Golden 0.94 10 (Cu)
5.Clear Cr abv Golden 0.94 9 (Zn)
6. Arkansas R biw Leadville 1.00 6 (Zn
7. Slate R biw Crested Butte 1.00 5 (Zn
34

-------
APT.F 2 . TART.F flF S1ATTflPIS WV4FRF WATFR QUAlITY CflNCEPTTPATXflNS FXC .FDS CRTTFRTA.
3AI1 F B MAP A R MAY JUN .1U . At IG
c :p ocT ny
QFC Mn. EXCFFOFNCF
fiBS PRORARI I,ITY
00300
ARKAMSA RTVFR NFAP MAlTA. CO.
ARKAMSAS PTVFP NFAP AVflNOAT.F, CO
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TART,V 2 . TAB lE OF cTATIIINS W hERE WATFR QUAlItY cnNrEplTpAtInNs EXCEFDc CRITERIA.
A OU In P CR AT RI.DR WEll) Cfl T INE
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FOTINTAIN CPFFK AT C0t,flRAflO SPRJN
Mf1NIJMFHT CDEFK AT PTKF.VIFW. C o.
c w 1 11AM RIVWR At SHTPOCK 1 NM
P4CFI,MO CREEK NEAP rol.nnAno-IITA$4
PICEANCE CPFYK AT WHITE PIVE9.Cn.
PRTNG CREEK NEAR N9NtRfl5f CD ,,
4OIITU PI,ATTF ktvrp At .luflAni Rr..
0fl61 5 1 4 0 7 N
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ARKANSAS RIVER AROVF PIFRl O. .Cfl.
ARKANSAS RIVER NEAR P uEBlO. Co .
ARKANSAS RIVER NEAP AVONPATE. ro
ARKANSAS RIVER NEAP NEPESTA. CO.
ARKANSAS RIVER NEAR NFT4STA
aRKANS aS At (AtfTN CANAl. HOC?
ARKANSAS RIVER NEAR IA JUNtA
ARKANSAS RIVER At V A3 ANIMAS
ARKANSAS RIVER At ! ,AI4AD. COlA
ARKANSAS RIVER At t,A ANIMAS
FOUNTAIN CREEK BElOW CO LORADO qp
FOUNTAIN CRE K NEAR P 11 101 1. Cn. -
FOUNTAIN CREEK t PuERTO
Co l u l pAno RIVER NEAP HOT S I1.FIIR SPRIN(,S
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xx
V
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xx xx
I
xx
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xx xx xx x
xx
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A 0.11
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3 0.33
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11 0.18
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P
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P fl .A3
TAN
FEB
MAP
A R
MA
JUN
.1(11.
AUG
SEP
0 T
D C
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xx
xx
xx
xx
xx
xx
xx
xx
xx
xx
x
x
xx
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xx

xx
xx
xx
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9
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xx x
x
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x
x
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xx
xx
xx
0
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x x
0
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x
xx -
CRTTFRTA BY TESS TNA I S! -
CRITERIA BY NOPE VA 15 t TF SS THAN 05*
CRITERIA BY WORE THAN 05*
xx
xx
xx
x
x
x x
xv xv
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-------
 n r 1ARTE oF STATIONS WHEPE WATFR OIOAT1TY CnNCE TRATIflNS FXCEF.DS CRTTPRTA.
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TADI.F 2 TJIHT,F Or STATIONS WHFRE WATFR QIIAT,ITY CONCENTRATIONS FXCE DS CRTTFRIA.
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FXCEFDS
FXCF.F.DS
CRTTFRTA
CRTTFRTA
CRTTFRTA
BY
Ri
p ,
l, 5S
MOPE
UfiPE
THAI
THAN
THAN
15%
15 
R5
C)
0
I-
0

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1ATJ, 2. TART E UF STATTOMS WHFPE WATFR oItAT,ITy CnNCL TPATI0NS FXCFFDS CRTTP RTA.
iAN FFR MAP APR MAT JI tN  UT ,I AUG OcT 0 D!C 0. CFFflF.MC
fl 5 PPIPARETTTY
Ptflfl7 FORK C!. P CRFFK HFL,OW ITT,ACKI AUK 33
SANO (P I PUPI.TN OTICH NOSOO NOt XT TX XT XX XX XX - - 44
RFAP CQFFK aflnVF MPRPTSfl  X! XX XX XX A flA7
RFJ P CPFFK Al iF FRSOPt flEMVFR COUNTY TX V 0 XX XX X x l fl . A7
00660 T p04
- I
ARKAMSAS RTVFR AT PORTT.ANO. Cfl XX 0.13
ARKAPJSAS RJVFR NFAR JFPFSTA. (0. ___________ X XX 4 0.75
APKAPJSAS RTVFR NFAO C(lflf,TD( F. MA xx - - 3 -. .33
FOUNTAIN CP K NFAD rnt.o AnO SPR XX nco
FOIIPJTAIN CPEFK Al COT.OPAOO .sppTN XX XX 1.00
FflI Nl4TN CP YK NFAP PTNr) . cr . 1 x xx 0.67
Mf)PlI)NFPT CPFFK Al PTKFVTFWJ CO. XX XX 7 1.00
Cnl,flPAr)0 RTVFR RFI.flW CflT .flRAflflIIT XX XX 3 0.67
SAPt ITUAN RTVFR A? SHIPPOCK. NM TX XX 1 0,67
54M ThAN P Al FOIIRCflPMFPS, Cfl !X x
MCFI,Ufl CPFFK NFAP COT,OPAOOIPTAH XX XX 0 3 1.00
TAPTATA RTVFR Al C l ) ? OQAOO PJfW T , xx xx I fl . 7
WHTTF plvrp RFT.flW MFFKFR CO. X XX 7 I .fl0
4HTTF QTVF.P AROVP  PANGF!,V. en, XX XX XX 3 1.00
PTCFANCF CP VK Al WHTTF PTVPP. CO. xx xx a
VAUPA RTVF.P RF7.0W OTVFRSTO. NFA - X
YAIP QTVFP FT.0W ct,KHFAn CRFPK - - - - TXXX 3 -
VAMPA 1TVFR PF!OW RAT( . rn . 1 -  -- - XX XX 0.67
- VAMPA QTVFP SWAP MAYRFTI,. C O , XX XX 3 0.67
T.TTT!F SNAK R!VFP NFAP ?I Y. Q - -- X - - - - I i.flO
WlT,I.TAUS FORK AT MOUTH. FAR HAM XX XX X 3 1.00
SA  MTr ,UFT. pxvcp Al MA ?IPPTlA. o X
SAM UTVIJ , RTVFR Al IPRAVAN. rn. 0 
SAN NTr ,hIrt, RTVFR Rrbnw_UPAVAN. c x X 3 0.67
(IIMNISON RTVFP NFAP GRAMP ,TIIMC 7 I !X XX 3 0,67
SPDTMC CRFFK NWAP MOUTPOSF. Co. XX XX 0 , 7
PIOPTH FUPK GI!NNTSOJ RIVER MF P S X - .
PAPACHUTF CPFFK UFIR C,PAND VAI,TF XX XX 4 0.50
(RANflE NFAP T,OflATOS.,Cfl. .. - ________  XX _ x _____ - - I ! . O
511Mm PI.A1IF RTVFR Al TU,FSR,,Rr.. XX XX 7 1.00
CACHF TA Pr UORF PIVFR AT TTMNATH - X 0.60
ST VPATN RFL,OWI,flNCMOPIl - XX -- - ____
T.EFT HANfl CRFFV AT MOUTH. AT I,flN XX 3 0.33
00516 PF T0IIW - - - - -  -
- -
S PI,ATF a 60TH IVF MflSDfl NO I XX TX XX TX X 40 n07
p ), T  I $RTU AVE  UflSflfl NO.1 Y x X X X ____ 50 0,76
SAMO (P I RUPIlN )TTCH 140Sf )) NOT XX TX X l XX V 0 4R fl.flt
70300 PESTflI !
- - - - -
ARKAMSAS RTVFR NFAP PIJFR?,U XV , - -
I,FGFNOI O fXCEFDS CRTTFRTA RY TESS THAN 15
X- FXCEFDS CRTTFR!A RY MQP THA 15% 6 hESS THAN 5*
TX FXCKFOS CRTTFRTA V MORE THAN P5

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TAOI.F 2 IART OF cTATTI)PS WHERE WATFR QUAlITY CONCENTRATIONS FXCEFDS CPTTFRIA.
jAN F 8 AR A R NAY JUN JUT AtI , F.P OCT OV DFC NO. EXCFFOFPJCF
- fl$S PPOPARIT,ITY
ARWA ?SAS RTVFR NFAP MFPF TA X X X -- fl -- X 0 X - X 2 fl A4
AR(A SAS AT CATI,TN CANAl HOC.1 XX XX X n X A
ARVA 1SAS RTVFR N AP 1 ,4 J I!NTA x XX xx xx xx x XX 11
APKAHSAS PTVFR AT .AA ANTMAS XX  - -- XX XX XX -
APKAHSAS RTVFR AT T,AMAP. Cflt,fl XX XX X XX XX XX XX XX 1 1.00
ARKANSAS RTVFP TIFAD CnOl.TN .F. NA - XX XX XX XX XX XX XX XX lfl 1.00
ARNAMSAS RTVFR AT lAS ANTMA XV - XX - - XX - -- - XX - XX A
PIIP(;ATOTPF R!VFR OFIOW TRINYOAn XX XX XX XX XX XX A 1 00
pIIpcATnTprRTvFR NFAP 7.45 ANIMAS XX XV XX I 1,00
APISIIAPA RIVFR NFAP 4(,tUl7 , P - I 1 6 1.00
llIIFPFA tfl PIVFR AT WT(HWAY P 87 X X XX X fl I A 1.00
CUIrHARAS RTVPP BF!,flW XX XX XX XX X xx 1.00
FOUNTAIN CPFK OFTflW (flT,flRftflfl cP I 0 - X 2 0.72
VOItNTATN CPEFK AT P(PFP!,() XX XX XX XX XX XX A 1 .00
COT ()PAflfl PTVWR AT MEW CASTT.F I X 0 X I X 21 0.61
CnT,O Afln RIVFR NFAP CAMEO -- - -- - _____ - -  - -
CflT,OPAOCI RIVWR NVAQ TflM4 V 0 X X X XX XX I X 21 0.76
COlORADO RTVFR NFI 0W Cfll,flRAflfl17T I 0 X 0 X X 9 fl .f 7
cAPI lOAN RTV R AT cHIPPOCK. NM a a 17 C 175
SAW ,1IIAN IT AT FOUR COPPIFPS 1 Cfl ! X - I x X 17 fl47
NCFI,UO CPFFK WFST or CORIF7 XX xx XX - X XX - 5 1.00
cc . n CPFFK NFAP COT,OPAPO IITAI XV XX XX XX XX XX XX XX XX XX XX XX 13 1.00
MAMCOS PTVFR 3 MTI.FS NORTH OF STATF !,INE X I XX I X XX 1.00
TA PT,ATA P NflRTH OF IA PT ATA XX I) X! - X l c 0.90
TA ATA RTV R AT COI.OPABflNFW H -- - - XX XX -- - - - X XXXX Xx1 0.15
ANIMAS RTVFR N AP 5IT,V RTflN - I 13 fl ,15
FlORIDA AT CON. WITH 4 TJM4S 0 6 (1.70
i pFF RTVFP AR COP. IIT H i,TNF  - - -  - --
WIITTF RTV R PFTOW PICFANCE CRK. A 0.13
w rr QTVFP AT RAN( ETY I  n
WHTTF P. NP. CflLfl. N II -  - -- - ----- - -
VAMPA RFT.rlW T.TTTT.E SNAKF RTVFR 0 - A 0.17
VTTTT.F StAKF RTVFR NFAP lIlY, CO - ____ I X 11 0.18
flfl (lPFS PIVF.P BflVF CONFT,IJFPJCF WtTH AN - - XX Y XXX  
flOT,OPFS PTV P AT c,ATFWAY XX XX XX X 6 0.90
6AH MTt IIFT. R VFR AT JATUPTTAJ  - ____ X a a 10 (1.40
cAN utv iivt, RTV P AT TIRAVAPJ. iri.  Y X -  - ______ -
cAM T IP !. RTVFR RFI,nW IIPAVAPS  C XX TX X X XX I I A 0.10
C.IJMNTSON SOIJTHFAST OF C.RT) ,TPIWCT a - A 0.17
(IPMIJTSOM RTVFP NFAP C,PAND JIIWC7T -- - -   X -o  .44
cPPTWC CPFFK NWAQ MOMTROSE. CO. XX XX X X X XX 0 0.67
IINCIJUpAI4CRF PTVFR af PTDCWAY 0 c
, wrOupAHr.RF PTIJFP AT flFt ,TA - 0 X XX XX XX XX XX XX 16 AQ3
SIIPFACF CPFFK AT ORCHAPO CITY y 6 0.17
N FK fl CIPIINISON AFFMW HOTCHKTSS XX I 6 0.60
ROAN CPF K NFAD OF I3FOITF I XX XX 4 ( I15
DOFtRTN(, FOPK AT MOIITH - IA 0,0
Far-IF RTVFP AT YP TIU I X x n n 75
CPOS CPFFK AR CON, WITH EAC.T,F - X - - - 0 - - a In
RItIF RTVFP APOVE DILlON PES. - - - A A 0.17
IFr.FNflt 0- FXCEFDS CRTTFRTA BY t.FSS THAI 15
X FXCEFDS cpyTFR A BY MORE THAW TFSS TRAM 95
XX- FXCEFDS CRTTF.RTA BY MOPE THAW P o
0
I-
0

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TARI,F 2. T RI.F fl STATTOUS WHERE WAT R OItAT,ITY CONCE TRAT1ONS EXCFFDS CRTTFRYA.
ARKA?JS S RTVFR NFAR PI FRI.0. CO.
APKAP1S7 S RTVFR N A0 AVONOATE. c)
RVA ISAS R VFR NFAP FPEsTA. Cp. - -
N) APP(A t5AS RTVFR AT A ,1 NTA, Cfl
APVA IS S !V l ! NTMAS . o -
APVAJS S RTVFR RFI,0W ,1OHM ! AP1 !P4
ARKANSAS RTVFP NVAO COOLTDr.F. KA xx xx
F(111N1ATN CPF  K N AP PTPJOH. CO. X_____ X
f.ITTT.F FflhI TT TM CRFFK PJFAF FflUMT 0 X
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MAP A P
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APTCKAPF PTVFP HF R UPAY. Cfltfl
XX
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cOIITH PI.ATTF AT IFNFWR OU
SflIITtl Dl, TTE Rrvrp N AP P1 ATTVTLTE
Y
0
X
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0
x
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20
3
0 75
A 7
SnI?TU PIATF PWAP KFPY
XY
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XX xx
ri
xx
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XX
20
c.Pt,,vrl F RFIJ1W FT. HORCAM
xx
xx
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SOIVTN PI, TTE PXVFR AT flAT,? C
x
xx
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SOtITH PlATTE HFIOW FPLTNC
x -
xx
xx
xi
xx
1.00
511111U PJ.ATTF R7VFR AT .IIJT.ESRIIPC,.
XX
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XX
XX
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17
1.00
CACUr TA flpfl PEAR Fl. rnt.t.t 1S
x
xx
xx xx
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XX
20
CACH  IA PflU R EAK GPE LFY
X
XX
xx xx
Ii
XX
XX
XX
XX
XX
XX
70
P;( THOMPSON NFAP MOTITTI -
I.ITTI,1 THf)MPSO 3 IF R RFRIHflhJfl -
XX
- - XT
TX
- -
XX XX
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0
XX
XX
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I,TT1T,F. 1$IOMPSON EAR HTI,t.IKFM
XX
XX
XX XX
0
X
XX
XX
XX
TX
XX
XX
10
STVRATN RFLOW TONCHONT
X
X 0
x
XX
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1
A
077
T , URATH WFAR 14 (11 1TH
X
XX
0
X
T,FFT HANT CR EK F.AP NIWOT
XX
X
X
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(I.FAP CRFEV NF B MOUTH
X
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PE P CPF K AT  rFrRqnN -nFMvFR COUNTY 7.1 n
o
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0.42
7 3OI flTcs 501
* *** *** $ $$ * $ S * 5* *
x c
0 X 7
x n X 7
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XX X XX X XX X XX
XX XX XX XX XX XX XX XX
Cfl flRAflO R!VFR N AP CI,cNWOOfl SPR
CfltflQAflfl RTVF R 7JVAR flF B 0IIF CO
f(IlnQAPI) R V R PwA (AMEn. CO.
(flTflPAflfl RTVcP RFL.OW COliORAOO-IIT
.qAH ThAN RTVFR AT SHTPPOCK. P4 -
SA 1 1 11AM P AT FOuR CflR F. S, CO -
UCFI,(l CPgFK NFAR roT,00AOo-IITAH
M$ Il(o5 RTVrR N AP fORTrP. CO.
TA PIATA RTVFR Al COT,OPAOONFW 14
WHITF PTUKP TIHOYF DAN(c 1,Y. ( ll
WHTT P. NP. Cr11.0. STATF LTNF. UT.
V77.IOW CDFFK N AP WHTTF PTVFP. C
PTCFANCF CEFK Al  WHYT PITFP. CO.
Y,TTTT,E .SHAKF PTVFR NFAP lilY. CD -
WIlSON (0F. K NWAP AXTAI.. CO.
FOTrWT, CPFF K Al MOuTH. NFAP (IAn
APJ U1C.IIFT, R!VFR Al HATIIRTTA, rO
SA MTC.IJ T, RTVFR AT IIRAVAN. CO.
SAP MICIIFT, RTVFI4 RFI.OW IIPAVAP3. C
2 11
I X 0 7
-- o A
 0 X 0 X X P
fl 0 ( 1 fl - (1 ______ 12
I X - X - X 1,
XX XX XX XX XX XX XX XX XX XX XX XX 12
X TX XX - _____ 5
XX XX XX X X XX TX XX XX 17
O X 0 1 9
2 .
- -. XX XX XX XX 4
XX XX XX X X XX XX XX XX XX XX XX 17
- X X I I
XX X XX XX XX XX P
X XX XX XX XX 7
I -i 0 12
- 7
3
0.20
0.43
1.00
1.00
1.00
10 1.00
2 1.00
-- (1.40
(1,43
0.A3
fl.A7
0.42
0.33
1.00
0.60
(l 75
(T 44
-- I  00
1.00
1.00
0.7 1
0.30
0.50
I ,FC.I Nfll
X
xx
xx - .- XX
fXEFOS CRTTFR!A BY TESS THAN 1
FXFPI)s CRTTFP A BY MOPE THAPI 15% A I.FSS YPIAW
FXCEFDS CRTTFRTA BY MOPE THAN R5

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TAOI,F 2 ?A T OF STATTONS WHERE WATPR OIPAT,ITY CONCENTRATIONS FXCEFOS CRTTFRIA.
Y X
Y - X
XX TX XX
X
X i - XX
X X
I
I, C.FNfl! 0
XX 
X
x ri

XX
I
I) I
XX
I
FXCFFI)S CRTTFPTA
FX ( EFDS CRTTTRTA
FXCEFOS CRTTFPIA
0 0
I
BY T,ESS THA 3 jS
BY MORE THAN 15% 
BY MODE THAN Q5
.IAW
F B MAP
A R
MAY
JI3N
1U
AUG
P
OCT
Noy D C
Nfl
EXCFFOFNCP
-
-
fl S
X X
xx
I
xx
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x x
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1.00
1.00
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XY
XX
XX
0
XX
XX
0
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X
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XX
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XX
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10
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1.00
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XX
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SATT CPFFX NFAP MArK. CO.
FAST SAlT CRFI.V( ,tFftR MACK. CO.
WF T SAIl (RFFK NFAR MAN. CO.
Al)I1HF CRFFK MEI R FPIJTTft. CO.
C.IIINTSON RTv P NTAD (.PANO JIINC7I
cPPIMG CPFFK NFAP MOITpocF., fl,
IINC(1PAHC.RF RIVER AT DFL.TA. fl.
p(1? u CPFFK NFAR flF. RFOIIE. (TIe
PAPA(IIIITW CRFFK NEAR GPAHD V ITF
PAQACHUTF CR FV ATc,PAND VAT.t, Y.
F rI.c  PTVFR Al GYPSUM. CO. -
SOuTH PI.ATTF R!VFP NAR WETOONA.
SOuTh PI.ATTE RTVR l .1IIT,FSRIIRG.
RT,I(l (PFFK NFAR FT. MORGAN. (0.
CACH TA PoIJnRr R(VEP P JOW FORT
ACHF V.A POIJOPP  DIVER AT TYMPIATH
CACHF TA POUOPr RIVER EAR GR FL
RTG THONPSflN RTVFR AT W0 1 1T14.NFAR
ST. T7RAT CRFFK AT MOUTH. F4F AR P
lEFT HANO CRFEK AT MOUTH. Al LON
00005 CNflIJCTVY
* * 5* * 5 $ $ * 5 * * * 5* **
ARKAMSAS RIVER NFAQ PuERTO -
I RICA SA.S RTVFR NVAP PU IlT.O. CO -. -
( APKASAS RTVFR NFAP AVONOAT,F.. Ca
ARKASAS RTVVR NFAP UFPFSTTI. CO.
ARYASAS RIVER N AR PJEPF TA
ARKANSAS A CA?l,TN CANAl, HOGT
ARKANSAS RIVER NEAR V .A JUNTA
ARK ASAS RIVER AT .A .JIIN1A, ( Cl. - -
ARKANSAS R TVEP AT lAS ANYMAS -
ARKASAS RIVER A lAS ANIMAS. (0
F%RKAAtSAS RIVER BElOW .IflHN MAPTIPI
VtRKAVtSA.S RIVER AT LAMAR. (OhM
ARKANSAS RIVER NEAR COOLIDGE. KA
PI A SA. R VFR A  uA ANTMA _  -
PUPC,ATOTQF RIVER BElOW TPTNTOAU
PIlP( ATflTflF RIVER HEAD lAS ANTMAS
APTSHADA RIVER NEAR GhlV .FP  . 
u4IUFRFA n RTVER AT HIGHWAY PSRi
rIICHAPAS PTVER NFT,flW WALSFMRIJRr
FONTAIN CRF.FK AT COT.ORAOO SPR PJ
FONATN CREEK BELOW COlORADO SP
FOUNTAIN CREEK HEAP PINON. CO.
FOIINTAYN CREEK AT PuERTO
lITTlE FOhIITATPJ CREEK NEAR FOUNT
rfly,nnADn RJVFP NEAR C.IFNW000 SPR
COT,00#flfl RIVER A PJEW CASTlE -
( flT,OPAOO RIVER NEAR flF OFOIIF, CO
IT
I
X
X
I
X x - XX
- XX XX
XV TX
XX XX
- XX XX
XX XX
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TX XX 0 XX
1X XX - - -X-
XX X I IX
XX XX TX XX XX
- - - - XX - - - - 
XX X X
XX XX
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1l 0.09
IS
IS 0. A7
 22 - - ( . 50
X 1 11 (L 5
-- ---  __ - I I .(O
XX XI A
XX 1 5 fl03
- . 1.00
XX XX XX XX IA 0.94
XI TX XI IX 21 1.00
- XX A
XX XX A 1.00
XI XX
I - A -- ( R3
V I A 1.00
X X A 1.00
o 20 0.15
O 24 0. R
I 5 1.00
- - - A I.Oo
XX 7 0.50
41 0.05
n 0 2 0.51
A
C i
X
I
TESS THAN P55
C-)
0
I-
0
0
0

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TAT* ,F 2 TART F n STATIONS WHERE WATFR OTTAT.ITY CnNCFNTPATIONS rxrrroc CRTTFRTA.
JAM FF6 MA A!R MA7 J jN .TUtj AIJG SE! OCT P30 fl C O. EYCFF.flENCW
- ORS PROPA II.ItY
COTITRA nO RTVFR NFAP CAMFO. CO. - X X X X X 0 .36
Cfl OPAfl0 RTVFR NFAP CAMFO x I
CnT,fl 7AOO RTVFP N A P TOMA X X X X X X 27 073
CnV.OPA OO RIVFP RFT,OW COLORADOITT X 0 0 X P 0.30
cAP uTAH P At F o uR COP PS, ro g, 0 fl X 17 0.47
U F7,flfl CPFFK wWST flF COPTF? - X! - XX XX XX XX - 5 1 .00
Mrrr ,n CPFFK NFAP COTOPAPOTI7AR xx xx XX XX XX XX XX XX XX XX XX XX fl 1 .no
MAMCOS RIVFP NPAP CORTFZ. CO. X XX X - S 0.60
MAMCOS RIVFP 3 MTLFS NORTH fir STATE T.INE XX X 0 X XX 3
TA PTATA P NORTH flW TA PTIATA - XX X x S 0.S0
TA PTATA RTV!P AT oTORAO0NFw M XX XX X 0 X X X V XX 12 0 75
C,HFFN P1VFP ap COT 1 , UTAH LINE  n A 0 .1 1
WHITF RTVFP PFTO%P! PICEANCE CPK. 0 A 0 .17
WHITW RIVFP ABOVE RAMCFT,V. ro. 11 0.18
WHITW PTVFP AT PANCETY - - A 0.17
YFTI ,OW CPFVK NFAP WHTTF PIVFR. C XX XX X XX XX XX XX XX XX XX IQ 1.00
PICFANCF CPF.FK AT WHITF RIVFP.CO. XX XX XX X X XX XX XX XX XX XX XX 17 1.00
T,ITTTF SNAKE RTV!R NEAR TIT, . CO ! X 11 0.18
WIT SON CRFWX NFAR AXTAT ,. CO. XX A - X XX XX XX 1.00
FOTF 1FT. CPVFK AT MflTT H NFAR OAK X XX XX - V X 7 0.71
OOT(IPFS RIVER ABOV! COMFT.IJFNCE WTTH SAN XX X! XX XX 7 0.57
noi,oPp-c PIVFR AT CATEWAY - -  -   XX - XX XX  XX c o. o
SAM NICHE!. PIVFR AT M ATIJRTTAJ o - X 11 0. 18
SM MIC IIFT , RTV R AT ITRAVAN. Co. 0 X X 8 0.30
a SAN MfC Jfl, RIVFR RFT.OW urAVAN. C X X 0 X XX X 11 0.64
a ATt CPFFK NFAP MACK. CO. XX XX XX XX 4 1.00
FAST SAlT RFFK M!AR MACK. CO. - -  XX - XX -  - XX 4 l AO
WEST SAlT CPFFK NFAR NeCK. p. V V XX - 1 1.00
ADORE CRWFK NEAR VPIJITA. CO. XX XX X X X 4 1.00
C IINNISON PTVFR NEAR C,RANO ,11lPC71  X I X 10 0.40
SPPTHC CREEK NEAR MONTROSE, CO. X V 0 0 V 0 0.56
IINCOtPAHr,RV RIVER AT R DCWAY 0 3 0.70
INrnpAH( Pr RIVER AT DFLTA -  . 0 X XX XX XX X! XX 13 0.87
I,NrOIPAHCRF RIVER AT Orl,TA 0 CO. XX XX X X XX XX XX 11 0. R2
SIIPFACF CREEK AT ORCHARD CITY - X - 6 0 ,17
N VI( fiF C.IIMNISON RFLOW H0TCH TSS I X X S n.A0
ROAN Cr)I.FK NEAR OF BFOIE. CO. X X 0 0 I XX XX X 11 0.82
ROAN CRFFK NFAD OE RF0IIF - 11 XX XX X 4 l AO
PAPACHTTTF CRFFK NEAR CRANDV TJ,E X X P 0 75
PAPACHITF CREEK ATCIPAND VAI.TFY. I t V X X XX 7 .7l
FAC.I,F RTVFR AT CYP5 1 1M T X V n 17 o.ce
nC.u,w PTVFR AT P$UM. CO. - V 0 X 0 X 41 0 7R
NORTH FORK RFPTRTtrAM RIVER NEAR LAIR!) X 4 0.75
ARICKARFE RIVER NFAR WPAY. COLA - X XX XX 3 0.60
SOOTH PlATTE AT HEPJDERRON V X X X X 0 0 X X X X 21 flA t
SOiTH PlATTE RIVER NEAR Pl ,ATTVTLI.E A X 7 1.00
SOTITH PLATTE NEAR KERSEY XX XX XX X X XX X XX X X X 10 0.89
SOUTH flLATTE RIVWR NEAR WFIDONA. XX XX XX X A I X XX XX X XX 1? 0.92
S.PI,ATTF RFI.OWFT. MORCAN XX - XX XX X - X S l AO
SOUTH PI,ATTE RIVER At RAI,ZAC XX XX XX X - - XX 5 1.00
LEGEND! 0 EXrEFDS CRITERIA BY TESS THAN 1 5% . - - -
X EXCEEDS CRITERIA BY MOPE THAN 15% A lESS THAN R5
XX FX EEDS CRITERIA BY MORE THAN P5S

-------
TAVII,F 2 TAM? F fl  STATTONS WUERF WATFR Q tAT,TTy CONCENTRATIONS FXCEFI S (RTTFRTA.
IA F B MAR
XX
XX
XX
XX
XX
XX
XX
IX
X x
X
X X
XX
XX
XX
XX
0 XX
X X!
XX X!
X XX
XX XX
X V
X XX
XX
XX X XX
XX T X
V
V
00070 TII R
NHPTU PLAT rF RTVFR NFAP NORTIIGATF. CO.
S PI.ATTF I 60TH AVF Mfl 5flfl
S 0l,ATTF i BATH AV  1 nsnn MO$
SAN ?) cD  OTIPITN DITCH MDSOO NOl - -
17
V 40
- 0 X XX 50
TX V XX XX XX 4R
00510 PFSIOIIF
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ARKANSAS RTVFR AT POPT7A4fl. C o.
ARKAPtSAS RTVFR NFAD AVOMOAT,F. CO
RKAS S RJVFP NFAP MFPFSTA. CO.
AWV#NSAS RTVCR N AD
APVAMSAS AT CATI,TN CANAl. Hfl(T
1TRKAHSAS RTVFP NFAR I A_JuNTA
ARKA4S S RTV R AT lAS ANTHAS
ARWAISAS PTVFR AT T 1 AMAP. COIn
APVA SAS RTVFP AT lAS ANTMAS
PTVFP H AR SF(U?Iflfl -
BFI.OW TP1 ITrIAp
P(Jr,ATflVRF RTV R NFAR LAS ANTMAS
IIIPFRP AMO PTVFP AT T TV.HWAY R5R 7
CIJCIIAITAS pTVrR IIFIOW WALSENRI1RC
F OT?NTATN CPFFK NWAP UANT1 II
FOtINTAIN CPFYK NAD lflTORAOO SPR
FoINrATN CPFWK AT COT,ORAflfl SPRYN
FOIINI ATN CPFFK I FT,OW CflL .flRAflfl cp
FUIINIATPi CPF.FK N AP PTNOi. CO.
V
V X
XX
X X
XX
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0 XX
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XX
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p 075
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21 0 ,67
-- 0 .64
A 0.11
0.44
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A A33
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A 0.13
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XX 10 fl.R0
XX d n i5
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XX
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5 (1 11Th PI.ATTF rwtrw STFQ1 TNC -
SOIITU Pi, TTp HTVWR AT 1IIT,I . . .SRhRC ,. XY XX
RTTflhI CPFFK FAR FT. MORr,AN. (0. XX XX
CACHV TA PflIIORF RTVFP AFTOW FliRT -  -
CACIIF I A pn jnpr PT IFD AT TTMNATH X !X XX
CACH TA POTIORF ?FAH Fl . COll INS X XX XX
CACIIF T A PflI ?ORF RIIF.P NFAW CRFFI . XY XX XX
CACHE TA POII! PF FAR C.DEFLF Y XX XX XX
RT (  THOMPSON RTVFR AT MOuTh-?. NFAR IA SALI X! XX XI
RI( TIIOMDSON PJFAP MOUTH XX TX XX
T,TT1?.F TUHUPSON lF P R RTHOhIfl XY XX
lITTlE ThlflUpcn I MF.AR MTI,ITKFN XX XX XX
VPATN RFI,rW T ,flTJC,MflNT . X V
VPATN MFAR MOUTH
ST. VPATN fRFFJC AT MOuTH.  ftR P Y X X
ROIIT,OFR CR, S IT 01.01) WFt,n (0 TINE -
lEFT HANO CRFFK *PFAR NTWOT T
,,FrT HAN?) CRFFI( AT MOUTH. AT TON XX
CI.FAP CRFFK NI AR MOUTH I V
RT..AW CQFFK Al tFFFFRSfl -flEPJVFR, COUNTY 1.1 n 0 X
TIPRKFY (RFFK NFAP MORRISON. CO. XX
A Oy DFC 40,

I
XX V XX 14
0
14
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XX
V
XX
X
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XX V XX
X V XX
X XX XX
XX I XX
XV
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EXCF Efl F N C F
PPOPAPIT,ITY
1.00 -
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X XV XX XX XX XI
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XX
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XV
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XX
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FXC F F D S
FT CFF OS
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fl XX l
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CRTT RTA BY TESS THAN
CRITFRTA RY MOPI ThAW
CRTTFRTA BY UOPF THAW
t515
15 v.FcS THAPI R5
R5
C,
0
1
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-------
TAOIF TABtE OF STATTOPIS WHERE WATFR QUAlITY CONCEPTRATIONS FXCEFDS CRTTFRTA.
JA J FFR MAR APR MAY JIIN IUb AUG SFP OCT 11W OFC O. EXCFFOFNCF
OT IS PROPAOIT ,TTY
FOIINIATN ERPFK AT PIJFIII.0 - - c X x - XX A
!,TTTT,F FOIINTATH CRFE.K NEAR FOIJPJT XX X XX 4 0.75
MOMIIMFPIT CPEFK AT DIKFVTFW. CO. XX XX X XX XX K lfl 0.70
ri,T.nPAOr RTV R NFAP bOTSF fl X X - 23 fl.13
COJ,IIPAOO RTV R AT NLW CASTlE XX X 71 0.17
CflT,( D fl ) RTVFR NFAP CAMFO X 5
(  T,flQAflfl RTVFR HCAD t,(1MA - X XX - xX x x - - x -  77 0 . 
APJ tHAN APOVF NAVAJO P SFPVflTP XX A (1.17
SA J .1IJAN RTVFR AT SHTPPOCK, PIN ________ X _______ XX XX XX K fl 0 X l XX I I
i cFi Mii  XX  XX - XX -
MAPICOS RTVFP AT MANCOS XX
UA tC0S RTVFR 3 MTI,FS NORTH OF STATF ?,TNE XX XX XX (LAO
TA PT,ATA P NORTH OF TA PTATA XX 0.20
INTMAS RTVFR NrAP ROMOAD. COT. XX c
r I,oRTr)A AT ( ONe WTTH ANIMAS _____ XX
InS DTMn PIUFP NEAR I,ARncA XX c 0.20
PTFI)RA RTVFR N W OF ARROT.FS. COT,O XX A 0.17
NAVA.tfl RTVWR WFAP ( HPOMO X c A. O
UHTTF PTVFP RFIOW PICFANCE CPK. XX XX A 0.11
WHT W !7TVFP AT RAN( FTY XX XX 0 A fl . 0
VAMPA pr IFD AT MTI,NFR -  XX - in - n 1o
VANPA PFT,OW l,TTTT F SNAKE RTVFR XX XX
T,11TT,F SNAKE AROVF t.TI.V - XX 7 0 O
flfl l.HQFS PTVFP AITOVF COPJFI.IJFNCE WTTH SAPI X XX XX _____ A
flfli,I1PFS OTVFQ AT C.ATFWAY -  XY 4 ( L
SAN MTv 1 1F 1, NFAP NORW000 n.n
C.IIMNTSON RTVR NFAD OFI,TA - - - 0 - - - 3 A.7Q
C.IIHHTSflPI SOIITHWASTOF r.po .ti, ic r XX XX -
IINC(IUPAHC.RF RTJFP AT OWT,TA - - XX XX XX XX x 14 0.71
NOPTIV FORK C,IINPJJSOM RTVFP NFAR BOWTE X 4
N FK OF ( IIPNTSflN RFLOW HOTCHKTSS x 4 095
ROAN CRFFK NFAP OF RFOIPF XX XX (I X 4 1.00
PflAPTNC FORK Al P011TH XX K IA 0.19
CRVSIAI, PTV D AT RFDSTONF XX 4
CRYSTAl. PTVFR FAR MOUTH - XX 7 0.14
FACIF PTFP AT C.YPSIIM X XX X _____ I? 0.13
OFAVFP CPFFK AT AVON K p.13
cNAK PIVFP PFTOW KEYSTONF - - X 4
NORTh FflRK RFPIIRT ,tCAPJ RIVER NEAR bAIRD 0 - 4 A 75
ARTCKAUFF RIVFR P1FAR WRAY. CO IM XX .4O
50111T t.ATTF AT I1F. IDFRSON 0 (I XX 71 0 .j4
SflItTH IATTF RTVFR NFAP P1.ATTVTI,TE 0 3 0.13
coI T PlATTE NFAQ VEPSFY XX XX Y X 20
c .PI.ATTF RFI,OW FT. MOPC.AN 5
5fl11751 0 1,ATTE RTVFR AT RAT.ZAC 1 0 0.40
CACHF TA POIJORF NEAR ( PEFLrY XX X I X 70 0.30
R C THr)MRSflN NFAP MOlITH XX XX XX XX 71 0 43
lITTlE T4flMP T) PFftR HFRTUPUO K A 0.17
lITTlE TIIOMPS0P IFAP MT1,TIKF - XX - XX XX XX X -  -- 71
ST VPATN KFI,OW I,ONCMOHT - . XX 11
l.FGFNO I O rXCEFDS CRTTFRTA BY T,ESS THAN !5 - -
X FXCF2FDS CRITERTA BY MORE THAN 15 A T.FSS THAN R5% -
X x  FXCEFDS CRTTFRYA RY MORE THAPI R5

-------
rAnI,F TARTE or STATTOWS WUFRE WATFR QUAlITY CONCE:MTRATIONS FXCF D CRTTFRTA.
vp rpj P! AR MOUTH
R ItOFP CR. AT RI.DP WFI,r) CO I,T iE
CT.FAP R FK MF.AR MOUTH
RFrIP CRF K AT ,I Fc RSOMnE NVrR (OUP3TY t.
10209 PFS SIIcP
-
c l pIV p r !IRAVAFI. ro.
SAM MIC.UFI RTV R RF1,OW IIRAVAPJ. C
H0 154 cUSP SF 1)
-
APKAMSAS RTVPU AT P(IRTT,A40. (0.
AWYAMSAS RTVFR HFAR POPTT,Afl. ( 0
1 )PKAHSAS RTVFR NFAP CflOt, O(F. KA
CIUOPAOO RTVFR WFAQ rw HFOIF. W
S H ,YIIAN RTVWP AT SHIPROCIC. M
SAM IIPAN P AT 0IPR COPMFRS, CO,
PC T.MO CQFFK NFAP rO!,nPAr )ntPTAH
tA PIATA RTVFP AT COTOPAOONfW H
WHTTF PTJE:R RF tflW MFFKFR. (Os
W l TF PTVFR AROVF QAMC,FI,Y. C .
WHTTF D NP. Cr IO. STATE: LTNF. UT.
YAMPA PTFP RF7.OW flIVEPST0J NFA
v ii i PTVFP PEV,OW CRAI(. CO.,
VAMPA DTVFQ ME R MAYRETt,. 10.
lITTlE SPIAVE PTVFR NFAQ TIJY. CO
WI1I,TAII.S FORK AT MOUTH. PIEAP H M
flTflFI, CPFFK At MUPITIP. NFAP OAK
SAM UTC.IPFV, RTVFP AT PIATIJPITA. Ct - )
rIINNTSON RTVFR N AP (RANO 7 1 1MC7T
SPP1MC CPFFK NVAR UOMTPOSF. CO.
NORTH FORK ClIIIPtTcplM PTVFP P F R S
PAPACHIIT CRFFK NEAR GPANI) V L!E
PAQACHIJTF CRFFK AT C.PAMI) VAT.FY.
!.ITTIE r.PT?7 ,tY CpF M Al flVF FIFRPO
PIP CRANOF NFAP T,I1PATOS. CO
Sfltt9 II PlATTE: RTV R AT 7lPV.F5RlR( .
!. FT HANO CPFFK AT MOUTH. AT ION
00910 CHI.OPTPE:
* 5 5* 5* * 5* 5*5* 5
VFT.IOW CPFFK NFAP WHTTF PIVFP. C
flflt.ORFS PIVFP AROVF COMFY UFNCF WITH SAM
flUtflpFc QTVFD AT C.ATFWAY
FAST SAlT CRFFK P1FAR MA(K. CO.
X X x
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X X XX XX X XX
X XX XX X XX
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l,FCCNflI fl rxCEFDS CRTTFRTA BY lESS THAM 155
X rxC t- $ CRTTFPTA RY MOPE: TWAM 15% & V.FSS THAW P5
TX  cXCEFDS CRTTFRTA 3Y U P THAW P51
0.70
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- 0 0 5
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XX X XX XX 0 14
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XX XX XX XX TX XX XX IQ
XX XX X XX X IA
XX XX XX XI XX XX 17
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0
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-------
TAOIF 2 TAR!! OF ST TTO!tS WHFRF WATFR OHM pry CnNCENTRATIONS FXCEFDS CRTTFRTA.
 A FFB A R MAY J N JUtJ A SE o P!nV  FC IH. !xcF !O !Pc !
- flB PRnR flI!,TTY
ARKA !iSAS RTVFP NFAQ DUFRT.O. rO XX 1 fl 14
APKA!ISAS RTVrP NrAQ AVflNOAt, !. CO X K X
IPKA I5AS RTVFR NFAQ NFOFSTP . CO. X X 0 q
AR A SAS PTV R P1FAP PJFpIcTA X K X A 0.67
ARKA!1S S AT CATIYN CANAl. HOCT XX X l K 0 5 A.PO
ARWA IS S RTVFR NFAP IA J NTA  XX XX XX XX XX A
M KAuSAS PTVFR AT IA IUNTA. CO. XX 1 1.00
API(ASAS RTVFP AT 7.Ac NTPIAS XX XX XX XX XX A fl .fl3
ARKAHSAS RTVFP AT TA ANINAS . o X I 1.00
APYAM.SAS RTVFR RFI,OW .IrIHM MA TTN XX XX XX XX XX XX XX 1 flO
ARKAMSAS PTVFR AT lAMA . rnl.n XX I XX XX 4 1.00
FIRKAHSAS RXVFR NFAR CnnI,Tr)(W. KA XX XX XX XX XX XX XX XX KY XX 1l_
ARKAHSAS RTVFR Al lAS ANTHAS  XT X X XX XX XX A AR3
PIJ0;ATOTPF PTVFR H IflW TRIJTflAfl XX XX XX XX XX XX S . O
PtJPC.ATOTPF RTVFR N AP lAS ANTMAS XX XX XX XX 4 1. 1 )0
PTSUAPA RTV R PIFAP Ac ,tI IFP 1) fl 0 fl .AO
4IIFRFAHn RTVPR AT )lJc.UUAY P5Al XX XX X K XX X A 1.00
CIICHARAS RTVFR RFEOW WALSFPJRIIRc XX XX XX XX I XX A I .00
FflNTATN CPFYK RFI,nW COLORaDO p n A 0.13
rflIIKTATN CPPFK NFAP T OP . CA. 0 K X X 4 1.00
Ffl INTATN CPPFK AT PLIFRIn XX XX XX XX XX XX
!,TTTIF FflhI!TATPJ tK II FI1UPIT 0 XX A 0.40
Cf )I,flRAOrl RTVFR NFAP TOMA - 1 0 X A flA7
COT ODAOf) R!VFR lOW CflIORADOHT X 0 ?
SAP JuAN RTVFR AT SIITPPOCK. PJM 0 0 0.17
cAfl IIIAN P AT FOUR CORMFPS 4 Cfl fl K V X I 12 0.42
HCFJMfl CPFFK WFST OF (OPT!? XX XX XX XX XX i .no
UCFI.MC1 COFFK NFAR rO?OPAnnIITAII X! XX XX XX XX XX XX XX XX TX XX XX i I .fl0
4ACflS RTVFR NFAP COPTF7.. Cfl X XX XX A
M4I ( rlc PTVFR 3 MTI S NORTH OF STAT! TIll! XX XX K XX A
.A PT ATA P NORTH OF A PtATA XX 0 XX XX
TA PT,ATA RTVWR AT CQTOPAflflNFW N K! TX XX X X XX XX XX XX 17
ANTMAS RTVFP NFAP ITV!RI I)P y A ( 1.33
C.PFFI PTVFP AR ( fl!. ITAH lYPIF 0 A 0.17
WHTT QTVFP AROVF PA (FIV . CO. 11 11 O fl9
YFI,T,OW CPIFK NFAP UHTTF X! X X XX XX X! XX q
PICFANCF CPFFK Ar WHYIF PIVIR. CO. I K I fl XX XX X X XX X X 1, fl .07
TITTIF SPIAK ! RTVFW NFA TIl . CO X K II ( ). IA
WIlSON CPFFK PIFAP AXIAl,. CO. X U ! _X fl75
FOTI)FI CQFFK Al MOuTH. NEAR OAK - X IX XX XX XX 1
flfll.OPFS PTV!P ftRflVF fflJFIIIFTJC ! WITH SAPS X X V XX S fl.A0
on InPIc RIVER AT ( ATFWAY X X I XX A fl $O
SAM UI .II I. RTVFR AT PIAT(IPTTA. o 0 0 1) 11) 0.40
cA RTVFR AT tRAVAN. rr. X
SAL UIr PFI, RTV R OFIAW II AVAN. C XX XX A .A7
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FAST SAlT CRFI -V PIpAR M )CK. CO XX K XX XX 4 1.00
WFST SAlT CR !V MFAR M CV. CO. XX XX XX -
OOHF CRFPK lEAP FPUTTfI. CO. XX XX X XX 4 5.00
r ,IIPINTSON SOI ITHFAST (IF (.RO TI IPICT ! - 1 1.00
l,Fc.FNO I 0 FXCF.FDS CRTTFP3A BY TESS THAl 15%
X. FXCFFDS CRITFR3A BY MOPE THAPI 1  % A lESS THAW A5
XX FXC!FDS (RTTFRTA BY OR! TMM P 5*

-------
.yAt) F R MAR
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SP?INC. CRFFK PJFAR MONTROSE . Co.
IIMCOMPAHC.RF RIVFR AT RTDC.WAY
IINCOUPAHGRF PIVFR AT OFt,TA -
TVNCOMPAHCRF RIVER AT DFLTA , Co.
SIIRFACF CR!EK T ORCHARD CITY
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CACUF V A POIJDRF RIVER REI,OW FORT
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XX
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-------
ARI,F 2 . TAfl!,F OF cTATTONS WhERE WATFR OIIATITY CflHCI2 TPATIflNS FXCF.FOS CRTTFRTA.
)A 1 FF MAP A R MAY JUN JUt AUG S .P O(1 rniv DFC Un EXCFEOF.HCF
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ARKAMSAS RTVFR UFAD PIFPF.STA 27 005
Fr1JPWTATN PFFK NFi,r W rni,npann sp x xx x x xx x Xx a Xx 24 0.63
FOUNAIW CREWK AT PUFRTO xx 6 0.17
CflT(IPAOII PTVFR NFAD rAM O
AVA,Ifl RTVFR NFAR CHt DUO XX
WHTTF RTJFP PFTnW DIC NCF CRK. XX c
flOT,OQFS PIVFQ AT .&T WAY X x X fl.40
I,NrrIP, H(RF PTUFP AT flFTTA XX 1 . 5 007
CRYSTAT, RTVFP AT RFOSTONF
PTfl RANflFATAJ,AMflSA - XX
cohiTu DI.ATTF AT H HflFRSflPI Y X xx x xx xx 20
.50 1 1TH PI,ATTE RTVWR NFAP PI.ATTVTIJT E 0.33
c(UITU PlATTE NFAT K RS Y xx XX 21 0.14
AfHF TA POIIORF PEAR FT. Cfll,t,TPJS o 1 0.05
CACIIF T.A POIIOPF NEAR c.PFFbFY I XX 20 0.15
PTG THOMPSON NFAP MOUTH - X 2t
ST VRATN R I OW TMN MONT X XX 13 0.73
RntIj,n P CR. AT RTI)P WElD CO TINE XX 2fl
CI,FAD CRFVK NEAR MflUTII - I X 17 fl75
00720 evANTlw
ARKANSAS P. REI,(IW TEADV]!,l, . CflL
ARKAP t SAS RTVFR NFAD AAlflN CTTT
(71 RKA IS S R7VPR NFAP PiIFB ,O 5 0.0
ARKANSAS RTV!P PIWAP WPEST Xx A (1.17
ARKANSAS AT (ATI,TN ( hNAl, HOGT XI A 0 ,33
ARKANSAS RIVFP NFAP V.A JUNTA A fl. 7
ARKA SIS RTV R AT .AS ANYMAS 6 0.0
ARKANSAS RTVFP AT lAMAR. COla A
RKAMSAS RTvrP AT lAS ANTHAS nfl
PIJDGATOTPF RTVFR NFAP .5E( UMflfl 6 0.0
P!IPC,ATOIPF RTVFR RFU,OW TPTNTflAD A
DIIp( Tl IpF RTVFR N AQ T.A APITMAS A
lhI,VRFANU RTVFR AT NTr.HWAY q5 87 6 0.0
Si CHAOI.Fs APOVP COUFI ,UENCF WITH N ST H X 6 0.17
FOUNTAIN CRFFK NFAP MAII3TOII Xx A
FOuNTAIN (PFFK RFI,OW COlORADO SP A 0, 7
HAT,FNUON (PFFK PIWAD UAT .TA. CO. 0 A7
CflI,UQAOO RTVFR N AP HOT SIJT,FIIR SPRTNCS
COTOPAOO RTVFR NFAP OOTSFRO X 0.70
SAN ,HIAN RTVFR HFI,OW PAGOSA -
UAMCOS PTVFR 3 MITF5 NORTH OF S TF T,IPJF
ANIP4AS PTVFP APOVE I)IIRANCO - 1 3 (133
PIFI)PA R!VFR HF OF A Rflt.FS. COT.O A fl .
NAJA.Tfl PIVFR NFAP CHROMO XX XX 4
WIITTF PTIFR T RAN ET.Y XX 0.70
VAUPA P1 IFP T MTl, lEP 6 0.17
YAMPA PFT,nW !.TTTT.F SHAVE RTVFR 4 0.0
D(IT,OPFS PIVEP AT GATFWAY . - XX . 5
t.FC.FNDT 0 FXCEFD5 CRTTFR!A RY TESS THAN 15% -
X FXCEFDS CRITFPTA AX MOPE TPA  15 & T .F.5S TItAN P5t
Tx  FXCFFfl5 CRTTFRTA BY MOPE TIIAP R5

-------
TA UIF 2. TAR! P OF STATIONS WHERE WATFR O h M ITY CONCENTRATIONS EXCFFDS CRTTFRTA.
x
I
x x
I
I
xx
xx
xx
SE P OCT NOV OFC NO,
n R c
4
Yx I
A
4
1 4
1 4
4
I A
F. V CFED FNCF
PP O PftPII ,TTY
1.00
0.17
0.75
O . c i)
0.75
O.7
0.17
0.17
0 13
0.40
O  70
np
0 .70
4 0.75
7 0.50
4 O 75
O.jj
S
3 0p33_
5 n.0
5 0 ,0
5 0.70
4 fl.25
4 0 ,75
5 0.70
5 0 .0
5
-
A 0.17
A O. l7
A
A
S
S
S
01014 rqponjhhpj
* S n * * * * 1* 5 $ * $5 * *
ARKANSAS RTVFR NFAP NFPFSTA. CO.
cAN T hAN RIVFR At SHIPPOCK. NM
nit4i crt,FNITTN
$ 5* 5* ** $ * 5* ! ** *5*
ARKANSAS RIVFP At t,AMAR. Coin
FOUNTAIN rpFrK At DIIWRT,O
rOI,ITPA O RTVFR NrAD cOMA
UCFI,MO CPFFK NFAP rOf,OPAOO-hhTAhh
4 0.75
l AO
4 0.75
7 0.50
C )
0
h
(3
0
AeR MA Y JON JUt A UG
xx
x
1 A UTCITFI. NFAP PJ!)DW000
SA MI CT I W I, RTVFR OFLflW (IPAVAN. C
(tI NISflN RIVFR NFAD flFt.TA
hINrrlMpHr.pr PTVFP AT DFLTA
ROAN CRFFK NWAP OF BFOIF
FAfl.F Q1VF AT RrOCLIFF
flEA V R CRFFK At &VON
(,OPF CPFFK At PICUORN SIIRDTV.
CODE CPFFK At MOOT
runss CREEK AR CON. WITH FApI.P
PLUF R IVER AROVE DTtJ.Ofl PISp
RT,UF RIVER RYLOW DILLON FS.
TEN MITE CPEEK AT FRTSCO
MICUTCAN RIVER AT WAI.UFN
Pin CRANDE RTVLR NFAP CRFEDF
Pin (.RANflF At R!,AMOSA
rom.,TriS PTVE NEAR MAGOTE
SAC.hIACIIF CREEK NEAR SAC IIACHE
.cr)hIThi PlaTtE RTVVR NFAJ) TOWN O  SOOTH PL
south , Ph,ATtt A hENDERSON -
co T PlATTE RTVFR NEAR Pi,ATTVTT.LE
cpiit PI,ATTE NEAR v ;.Rsvy
c.Ph,ATTV RELOWET. MORGAN
cflIhTh PlATTE RIVER AT RAt.Z C
SDT PlATtE PFI,flW STEPLYNC
22 CArHE V.A PO IIOR E AROVE FT COL lINS
CACHE VA PflIJDRF NEAR C.pFFI,FY
RIG THOMPSflN NEAR LOVElAND
RIG THflMPSON NEAR h4OhlTh4
ST VRATN RET,AW l,ONCMONt
ST. R lN NEAR MOutH
flflhhl,DFP CR. AT Pt DR WElD CO j.INE
(fEAR CREEK AT WMEAT RIDGE. COLO
JAN F!R WAR
V
V
V
xx
V
V
V
xx
xx
V
V
V
xx
xx
xx
I
xx
xx
V
x
V
0
x 4 O75
71q 00 MERChIR Y
YANPA RI VER NEAR P4AYRETL. CO.
x
_xx I
0
x
V
CRITERIA BY TESS AI 15%
CRITERIA By MOPE TMAPJ 15%  LESS ThAN 05%
CRITERIA flY MORE TWAN 05%
lEC,FNOh ; rxrrnS
X EXCEEDS
xx   XCEEOS

-------
TARIF 2 TaRTE OF STATIONS WHERE WATFR OHATITY CONCEUTRATIONS EXCEFOS CRTTFRTA.
JA FFB MAP APR NAY JUN TUf AUG SEP O T MO DFC P1fl E:XCFFDFPTCF
- _ fiRS PPOPARII,ITY
o1o47 CflPPFR
ARKANSAS R BElOW T,FADVJT.t,F. C2L XX X Y X A 0.67
ARVASAS RTVFR Al PORTT AND. (0. XX 4
RKAMSAS RTVFR NFAR AVONOATF. CO 0 XX 3 0.67
ANKANSAS RTV R NFAP MFPFSTA. CO. XX I 0,33
AR (AP1S*S RTV P NFAP HEBESTA 21 0. 14
PIIPC,ATOTPF RTVFR NFAP SEC,(INOI1 A 0.17
l1!IFRFAMO RIVFR AT NICHWAY R5 7 A 0.17
FOuNTAIN CPFPK NFAR PINOM. C-fl. 7 0.50
I4AIFNUON CPFFK NFAP MAlTA. CO. 3 013
cAH IIJAN ABOVE NAV Jfl s vn R xx S
SAN 1 1 1AM RTV R AT SHTPROCK. NM XX XX - 4 0. 50
cAN 111AM P AT FOUR CORNFPS. Cr1 X xx 3 0.67
NANCflS RIVFR Al MAPICOS - - XX 0.70
TA PIATA PTVFR AT I1T HWAY 1611
I A PT.ATA P NORTH OF V.A PTATA X - S 0 20
ANIMAS RTVFR NFAP ITVFRTON XX XX XX XX X 17 0.59
InS PTPIOS PIVER NFAR t,? 1 RflCA  XX 4
VANPA RTVFP MFAR MAYBF Tt.. en. X 4 0.75
ITTIT,F SNAKE: APOVE lIlY - XX 7
TTTTT,F P1AKF RTVFR NFAP lilY. CO XX XX 0 4
WIT SON CRFFK NFAP AXIAl  CO.. XX 0.75
flOT.OPFS RIVER AROVF CONFTUFNCF WTTI4 SAM x - 7 0,14
AM UTC.IIFT, NFAP PIOPW(lflfl XX S
CIINUTSON RTVFR NFAR CR Nfl TIJPCTT 1 4 0.73
IINCOMPMI(RF RTVFD T RT!)c.WAY - X 0.50
FAST RTVFR Ar COMFY,. WITH TAVtflR 0 5
ST.ATF  PTVFP flET OW CPFSTEO IU?TF XX I XX 0.60
FAc,I,F PTVFD AT TflWU OF FOWARIIS 0 0 - 21
OFAVFR CPFFK AT AVON - - XX 0 7 0.79
0 1 , 1 W RTVFP NFAP COHFI.(IFNCE WITh COT,00AOO X S A 70
SNAKF I1TVFR BI T.OW KFYSTOPJE X X X 4 1.00
FPASFR RTVFR NFAP CRANRY 4 fl.25
PlO (PAIJOF PTVFR NFAP flFf PJORTF n 3 n 13
PI (WANPF NFAP t,OflA lOS. C fl X 4 0,25
S FflD RIO GQAD  P Al TflWN Of SOUTH FOR V 0.40
5011111 PlATTE: RTVFR NFAP TOWN OF SOUTH Pf 0 6 0.13
SOUTH PI,ATTE AT IIE:MDFRSOU . X 21 0 05
CLFAP CNFFK 0E: .OV 104110 SPPIA ,f..5 - X XX XX XX - XX
CI,FAR CRFFW ROVF C- ,flT.OFN - 0 XX X XX XX XX XX XX XX XX )7 0.04
rIFAP CPFPK AT WHEAT RI1)CE. Coin - XX 1?
CT.FAR CRFFK NF.AP MOUTH - XX X I 0.17
NORTH FORK CI.FAR CRFFK RFI.OW RI,ACKHAWK XX XX XY 3 1.00
WFST FORK CYFAP CRWFK RFT.OW FMPTRE: 1 1 0.67
01051 lEAD
** ** * **** *
AN II I AN R AT FIllIP CORNERS. CO TX 1 fl. 33
ANTMAS RIVER N AP c1l,VFRl0N fl 17 0.AR
LFGFNOI O XCEFDS CRITFP!A BY TESS THAN 15!
X- fXCE:FDS CRTTFRTA BY MOPE THAN 15$ fF55 THA P55
XX EXCEEDS CRTTFRTA MY MODE THAN P55

-------
TAPI r 2. TAB! F OF cTATIOMS WIIERI WATFR QIIA!.TTY CONCENTRATIONS FXCFFOS rRTrFRTA.
JAM FFB MAR APR NA .Jt N JIfl, A IIC SEe fi!T  (1 D!C
Mn..
S
EX en rwn cr
PPflflAfli !. ITY
fling? tin e
- -
ARKASAS R, PE!,I1W !EAflVIIt,F. .jpt. X X XX XX XX XX A
ARKASA.S RTVFR AT PORT!,AMD. en XX 4
ARKAnSAS RTVFR NFAR AVONOAT.E. C o X 1
ARKANSAS RTVFP NFAP MFPPSTA. en. XX 1
ARKAPJSAS RTVFR MF AP MFDESTA X XX 21
ARKAMSAS RTVFR AT lA MA R. Cfl!9 XX 1 4
PIIPGATflTPF RTVFR NFAR SLGIJNDI - XX A
IJUFRFAMO RTVFP AT HIC IIWAY P587 XX A
FOUNTAIN CREFK RFI 1 flW rflI ,flRAflfl SP X 24
FOIIPJTAIPI CRFFK NFAR PIAIOM. en. X 7
rny.npAnn RTVFR NFAP CAMFO I -
SAP IIIAN RTV R AT SIITPROCK. !M XX X - 4
SAM lOAN R AT FOUR CORNERS. ro -  - - - -   XX - - -
ANTUAS RTVFR N!AR Si!,VFRTO N XX XX XX X XX XX XX 1 9
ANTHAS RTVFR A PPVF D!IRANCO 0 1
WT!,5fl14 CRFFK NFA AXIAl ,  Cfl. n
SAP  MIC IIF!. RTVFRAT MATIIPTTA. CO fl
r.ppMNT SnN SOIITHFAST OF CR0 JIINCT fl  1
I!PIrOMPAHCRF RI U I O AT RTDCWAY. (1 3
FAST RTVFR AT flMF7. WTTP4 TAY lOR X S
SIIATF RTVFR PETI! CRFStEO PIITTF XX X XX fl XX S
FACLF PIUFR T pFnClTFF - X 4
rAcI.F PTVFQ T TT!WM OF FOWARTIS XX X 21
FACIC RTVFR AT CYP IIM . . 0 I I
(R(S rRFFK AR imn. W ItH EAed.E  - - -- - --------   - ---   - - 4
SNAKF RTVFR RFTI1W KEYSTOE XX X XX X 4
TfM NT I S CPEFK AT FRTSCO - X 5
Pjn CRANAF NFAR wAr.nnwnfnr.Ap    X - - - - - 2
Din CR ANOF RTVFP NFAP nE ! NORT ! X . - 0 4
Cl,FAR CR FK AFt fiW IDAH O spp in s . - XX XX XX X XX XX 7
rT,FAR CRFFK ftflflVW CflT.DFN - - - X l - - XX - - X XX X X X - r 17
rl,FAP CArrY NFAR MO uTH X 1 ?
M0D9II FORK CEFAR CRFFK AFIJOW B!,ACKHAWK _______ XX XX _____
01077 CAOM7IIW
ARKANSAS R RFT.OW !,E.AflVTT,I F. - fl it.
f4RKAPISAS RTVFR NFAQ PIIFRT,O. en.
SAN 111AM A AT FOUR CORNFDS. en
MAVCfl.S RIVFP AT MAMCOS
N0 T FOOK CIINMTSON RTVFP PJFA P S
PJrJRTN FODK CPPN iSfl RiVER WFAR ROWTE
cI,ATF PTVFR PFT,f)W CRFSTFfl RIITTF
r I,FAR CRFFK RET,OW TI)AHO SpR IN GS
4 -
7 0.30
3 0.13
- -
XX 4 0.75
4 0.25
- - ---- - 2 O .3O
3 013
PROCFSCTNG CrIMPIJFTF FOR PFOIJFSTFfl PFR inn
C,
0
r
0
a
0
1.00
0.75
0.13
(.11
( .19
0 .07
0.1 1
0.17
0.04
O  Sn
0.70
0.50
- A.I l
n.q2
0.13
0.17
1.00
0 , 14
- -
0.70
I .00
- - 0.25
0.13
0.09
 - (L it
1.00
0.20
- 
0.50
1.00
(LOB
I  00
XX
XX
XX
X
XX
XX

-------
Table 3. Water Quality Trends
Stations and Parameters where Stgniftcaflt Statistical Differences were Observed.
Legertdz = In roving Trend; Degrading Trend; * = Parameter concentrations are at high levels.
., , I I
Station I I I
Arkansas R biw Leadville
Arkansas R Hr Malta I I I
Arkansas R Hr Canon City 0 Cd
Arkansas R at Portland I
Arkansas R Abv Pueblo I 0 D
Arkansas R Hr Avondale D
- - 
Arkansas R Nr Nepesta 0* 0 0 As
Cd
Arkansas R Hr Nepesta Cu
Pb*
 --
Arkansas R Hr La Junta As
Arkansas R biw John 1*
Martin Reservation
 -
Arkansas R at Lamar D C 1 Zn*
Arkansas R Hr Coolidge, KS
I
I
5 e
Purgatoire R Hr Segundo
0 Cd
Purgatolve R biw Trinidad
0
0 Cd
Purgatoire R Hr Las Animas


0
Mg
Cd
Cucharas R biw Walsenburg
Zn
St Charles R abv N St Charles
.,
0
0
0
D
Fountain Cr Hr 1anitou
0 Cd
Fountain Cr at Cob Spgs
I
I
Fountain Cr blw Cob Spgs
Fountain Cr Hr Pinon
0
I C

1
Founta1CratP l
.---
.-
L
-
-
-
-
_ -
H-
-i-
54

-------
Table 3 (continued). Water Quality Trends COLORADO
Stations and Parameters where Significant Statistical Differences were Observed.
Legend: I = Improving Trend; O Degrading Trend; * Parameter concentrations are at high levels.
Station
a

-
a
u

c
V
0
0


z
a
0
i
0
.
0.
a
o

lI
0
0
,,

a
>

0
a


0
0
.,
0

o
C
41
0.

,
a


C


a
a

U,
a
o

i_
o
1
C

u
-_
1
a
a
a
c

..
=
a
.
Z
Monwnent Cr at Pikeview
D
Halfrioon Cr Nr Malta
D
Granby Punp Canal Mr Grand Lake
0
Colorado R at Hot Sulphur Springs
0
Colorado R Mr Dotsero
0
I
I
Zn
Colorado R at New Castle
D
0
1
I
Zn
Colorado R Mr Cameo
I
0
Cd
Colorado R Hr Loma
I
Colorado R blw COUT Line
I
I
I
I
I
Mc Elmo Cr blw Cortez
0 Cd
Mancos R at Mancos
0
1*
0 Cd*
Mancos R Mr Cortez
1*
1
La Plata R at Hwy 160
0
Animas R Mr Silverton
-
I
D c
Aniems R Mr Bondad
0 Cd
Florida R abv Animas R
0
Navajo Mr Chromo
D *
Green R at COUT Line
D
Cd
White R at Meeker
D
Cd
White R blw Piceance Cr
0
0
Cd
White R at Rangely
T
0
Cd
White R Mr CO .UT Line

.
1-
I

L
55

-------
Table 3 (continued). Water Quality Trends
- Stations and Parameters where Significant Statistical Differences were Observed.
Legend: I In roving Trend; = Degrading Trend; * = Parameter concentrations are at high levels.
-
Station
a


0
.


c
a
c i
0
l_
.
z
A


a
.c
0.
U)
2

.n

0
a
.
a
>

o
U)
.

I
;
0
Q
0
a

c
a
0.

In
a

C

.
a

a
1

&,
a


i
0

-i

U

U
1

a


.



a

X
Yampa R Mr MImer
Yampa R biw Little Snake R
o
0 Cd
0 Cd
Foldel Cr at Mouth
D*
Dolores R abv San Miguel
0*
0*
0*
Dolores R at Gateway
DCd
San Miguel R Mr Norwood
0 Cd
Gurini son R Mr Delta
DCd
Gunnison R Nr Grand Jct
i
i
r
D g
Uncouipahgre R at Ridgway
D
Mg
Uncompahgre R at Delta
0*
0*
1*
I
I
Cu
2
Toinichi Cr at Gunnison
0
DCd

E Taylor R abv Taylor R
D
Taylor R at Almout
0
Roan Cr Mr De Beque
D*
D

Parachute Cr at Parachute
D
Pb
Cd
Roaring Fork at Mouth
D
0
D
Cd
Eagle R at Edwards
I
.
0
Cd
Eagle R at Gypsum
D
0
1
0
Cross Cr abv Eagle R


0


I


Cu
Gore Cr at Vail
U
(
Gore Cr at Bighorn Sub.
U
Blue R abv Dillon Res.
0
0
I
D
Cd
56

-------
Table 3. Water Quality Trend Table
Stations and Parameters where Significant Statistical Differences were Observed.
Legend: I = Improving Trend; O Degrading Trend; * Parameter concentrations are at high levels.
Station
a

.
a

C
a
a
0

a


0
.C
a.

a
-
0
v,
O
a
>

0

al
.
0
v
0
a
O a
0
a c

a

a

a
O





a
a
a
,



Blue R abv Colorado R
D
0
N Platte R Nr Northgate
I
Michigan R at Walden
DCd
Little Grizzly Cr abv Hebron
I
Rio Grande R at Alamosa
I
Zn
Rio Grande R Nr Lobatos
0*
D
S Fork Rio Grande at South Fork
0*
Conejos R Nr Magote
D
N Fork Republican R Nr Laird
D*
D*
D
0 M
Arickaree R Hr Wray
Zn
S Platte R Mr South Platte
I
0 C
S Platte R abv Littleton
I
I
S Platte R at 60th Ave, Denver
1* NO
DJ
) 1*

0*
0
S Platte R at 88th Ave. Denver
0 (Ki
ldahl
D
0
D
S Platte R at Henderson
1*
0
S Platte R Hr Kersey
1*
i
D
S Platte R Hr Weldona
.
1*
1*
i
i
S Platte R at Baizac
0*
S Platte R biw Sterling
Mg
Cache La Poudre Hr Fort Collins
0*
1
I
Zn
Cache La Poudre Hr Greeley
- 
ii
I
1*
I
P
I
II
I
I
I
I
El__
Mg
I
COLORAD3
57

-------
Table 3 (continued). Water Quality Trend Table
Stations and Parameters where Significant Statistical Differences were Observed.
Legend: I_=_Improv inq Trend; D = Degrading Trend ; * Parameter concentrations are at high levels.
-
Station
a

I_
e

i
01
0
.
U I

I-
o
.C

2
U,

0
v,
0
l
>

0

U,

0
U#



C


a
C

u
a

o


g


3
U I


c

U,


Olympus Tunnel at Lake Estes
D
D
D
Big Thompson R at Mouth
I
I
Little Thompson R Mr Berthond
DCd
Little Thompson R Hr Milliken
I
1*
1
i
DCd
Little Thompson R Mr Milliken
i
Horsetooth Res Mr Fort Collins
I
I
St Vram Cr biw Longmont
t Zn
St Vram Cr Mr Mouth
1*
D
Left Hand Cr Mr Niwot
0*
Boulder Cr at BoulderWeld
County Line
D
Clear Cr abv Golden-
0
*
Clear Cr at Wheatridge
I
0
0 M
Clear Cr at Mouth
DCd
Sand Cr at Burlington Ditch
D
D*
Bear Cr abv Morrison
0 Cd
Bear Cr abv Morrison
1 Zn
Bear Cr at JeffersonDenver
CountvL lne

o*
D
o
o

.
I
- --.
I
I
I
.
I

11
.
I
. .

L
I
I
58

-------
M0NT 
Table 4. Ranking of Critical Water Quality Stations by Pollutant Group
No. Avg.
Exceed. Mos. Conc.
Fecal Coliform Prob. Excd mg/i
1. Muster Cr nr Kinsey 1.00 2 13760
2. Yellowstone R at Huntley 0.67 10 1305
3. Custer Cr nr Kinsey 0.40 2 5793
4. Yellowstone R at Billings 0.64 7 390
Nitrogen
1. West Parrot Cr nr Roundup 1.00 12 2.49
2. Muster Cr nr Klnsey 1.00 4 5.15
3. Big Muddy Cr nr Antelope 0.71 5 2.36
4. Glendlve Cr nr Glendive 0.57 4 4.04
5. E Fork Poplar R nr Scobey 0.75 7 1.21
6. Home Cr nr Ashland 0.75 6 1.31
7. E Poplar R at Intl Bdry 0.57 7 1.19
8. Red water R nr VIda 0.50 6 1.23
Phosphorus
1. Muster Cr nr Kinsey 1.00 1 3.59
2. Powder R nr Locate 1.00 3 1.10
3. Powder R at Moorhead 1.00 2 0.83
4. Milk R at Nashua 1.00 2 0.42
5. Missouri R nr Culbertson 1.00 2 0.34
6. Yellowstone R nr Sidney 0.83 3 0.24
7. Rosebud Cr at Mouth 1.00 2 0.26
8. Rosebud Cr nr Coistrip 1.00 2 0.24
9. Missouri R nr Landusky 0.67 2 0.36
Dissolved Solids
1. Otter Cr nr Otter 1.00 9 5085
2. Hanging Woman Cr biw
Horse Cr 1.00 9 4061
3. Redwater R at Circle 0.92 10 3123
4. OFallon Cr nr Ismay 1.00 10 2501
5. Home Cr nr Ashland 1.00 9 2676
59

-------
Table 4 (Continued). Ranking of Critical Water Quality Stations
by Pollutant Group
No. Avg.
Exceed. Mos. Conc.
Dissolved Solids Prob. Excd mg/i
6 Otter Cr biw Fifteenmile Cr 1.00 9 2526
7. Fattig Cr nr Delpia 1.00 12 1774
8. Redwater R nr Vida 0.92 10 2142
9. Powder R at Moorhead 1.00 11 1637
10. Beaver Cr at Wibaux 1.00 9 1658
Suspended Sediments
1. Powder R at Moorhead 1.00 8 4057
2. Muster Cr nr Kinsey 1.00 4 6700
3. Powder R nr Locate 1.00 7 2337
4. Custer Cr nr Kinsey 0.75 3 5197
5. Glendive Cr nr Glendive 0.86 6 2080
6. Muddy Cr at Vaughn 1.00 2 2790
7. Muddy Cr nr Vaughn 1.00 1 4130
8. Mizpah Cr nr Mizpah 0.71 5 784
9. Musseisheli R nr Roundup 0.71 8 670
10. Yellowstone R nr Sidney 0.86 5 356
60

-------
TAPLY 5. TART V OF CTATTI1MS WIIFRF WATFU ( aII M jty cn rEMTPAtTflNS EXCE FflS CRTTFRTA.
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PI1WOFR RIVFR MFA T,flrhtF. T. X - - X - -
MI?PAH CRFFK AT flITVF. Mt.
MI7PAII CPFFK MFAP MIIP,tH. PIT. _____
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H(1ME CPFFK NFAP ASMLAMI MT 0
PRAIPTF flO( CRFFK lEAP BTRMFY IT
HAJGTM( WOMAP CRFFK MFFtR j3TRMfv, -
POPLAR RTVFR AT INTERMATTOTIAT P U-
POPIJAR RTVFR MFAP SCORFY
WFST FPRY Pfl LftR RTVFR NFAP Pp m 
EAST PflPT ,AR PTVFR At TMTEQNATTO XY X
FAST FORK POPLAR RTVER NFAP ccna
POCK CPFFK RFLOW HflRSF CPEFk.  JE X X
3 1 6Th rpr rol l
MISSOI IPI RTVFR At VIPGFLT,E. MT. xx I?
Uj55O IJP RTVFR NFAP TAPIO IISKY. PT xx Q
YFI.LflWSTflNF PIv EP At TAUPE? MT - - - XX  - - -  - -  - -
O YE?LOwcTOMF RIVFR AT RTIt,IPIGS MT X V 0 XX V Yx V I ) 11
YETLPWSTONF PIVEP AT HIIUtLFY. MT X X 0 X X X X XX XX XX XX PP
yE, ,Lw TNw iivpP EAR ?ItLFS i ttv. Mt. - - - - - -
POWDFR RTVFR M AP TOCATF. MT . XX XX XX I I
TOPC,IIE RTVFR At STATF TIME MR OECKFR MON xx xx xx 1 1
PILISTFP CREFK NFAR KINSFY jT - -  - -  X X  X V - - -  - 4
CIJSTFR CPFFK MFAP KIMSFY PIT XX XX c
flFA?,i,OM CP FK PYFAP TSMAY. MT. XX 0 I I
CLFAP CUFEK NEAR HOYt MT -  - - -  - --- ---- -- -- --- - - -
IIPPFP SFVFMMTI F CRFEK MEAM LTNOSAY Mt x
flEFR CPEFK NFAP ( .LFMflIVF Mt x x c
EASt POPlAR PT IF? At TMTEPNATTO  - V K I t  -
porx CPFFK RFLOW HoRcF qurK. M XX I i II
MII,K RTVFR At NASHUA . MT. X X 1 7
CRflW ROCK A EK PIEAR COI1AG M Mt - - -   - -   d i
PIJYFTDFR CPEFK MFAP POCKY ROY T X 1
M SsrJ.cHr,j, PIVEP AT MO5PY Mt. - - - - -- X  - - - - -
315 01 tot ro i l
* 5 4*5*5 * 5 * 4*4 5* * 4
YFII.OWSTOMW PIVEP AT UlINtIFY. MT XX 0 X X X V X l
YET LOWSTOMF PIVEP MEItP MILFS CITY. Mt. XX 1 4 0 A7
00600 totA l LI -
5* ** * *4* 5* 5* 5* * 4*
MISSOURI RIVFR At V1Pr.FI,U. P IT. 1 1
M ISSOIJPI RYVFR NFAP TALIUIISKY. T 1 n4 4
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-------
TAPI,F 5  TAP.),F flF cTATTONS W WPE WAT R O1A!,ITY CflNCE!TPAT1O JS FXCA I) cpTr RIA.
xx
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YL!,I,OW5TONF PIER FAR MII, S CITY. MT 0
VFP.l,0W 9flNF RIUFP NEAR TFR  Y. T 0 0 X
VE!I,rIWSTOIIF RIVEn NEAR STDPJFV. MT. x
RhJPN CRFF IFAR SAVAC.F. MT.
P(IWDFR RTVFR AT MOOPIMF Al). MI - -- - 
Pfiwnrp RIVFR tJ AP lOCATE. MT. XY
M 1ZPAH CP .FK AT OLTVF. MT.
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Tr1A GuF PTV R AT TATF IUF NP OECKER MON XX X
TOMC,IIE RIVER A TIYIGIIF R DAM. NE
TflPGPIE RIVER BY I4ACTNC WOMAN C.
TO JG PE P BY ORANO IBER RRIr,(:F., xx
TONGuE RIVER AT MITES CITY. UT. Xx
PIIMP T  CPEEY EAR l,OF 5CR. MT.
PuMPKIN CREEK NEAR MTI. S CITY  T x
OTTER CREEK NEAR OTTER MT
(1TTF P CREEK ET,uW AlET F MTI,F CREEK PiP pj X X
 T FP (PEEK AT ASHT,AP O. MT. x XX
HOME CPF K NEAR ASMI,ANP MT X x X
COW CREEK FAR C01$TPTD MT
MYISTER CREEK PJFAP KPS Y MT XX XX X l
CUSTER CPF K NEAR KINSEY MT xx
OFAT,Y,rIN CREEK NFAP TS  1AV. MT.
IIpP P SFF1MTL .E CREEK NEAR T,TNOSAY MT I
C.T,FNflj lF CREEK NEAR ( t,ENflhE MT X xx
OFFR CREEK NEAR Gi,FNOTVV MT - -- - XX -
COTTONWOOD CPFEK NEAR INTAKE MT X 0
OCAVFR CPE K AT N1RA lX MT xx xx
RANGING Wfl  1AM CREEK R I HORSE CPEFK NP I x o n
P))SFRUT) CREEK AT KIRBY MT xx
POSIPIJO CREFY ERR C I,STPIP. MT. 0 X
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RIG SAPfl CT AT WVMONT STATE lINE
PIG MUOOY CREEK N AR AMTVI flPF M1
POPlAR RIVER AT TNTEQHATII)c?AI, RU
POPI AR RIVER WEAR SCOHEY
POPI.AR RIVER APOVE WEST FORK NFA
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WEST FORK POPLAR RIVER I!FAP BRED
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I
xx
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-------
PARL,F 5 TART E flF STATIO S wtl P WATFR QuA? ITY CnHcENTPAIIflhJc VXCIFDS CRITFRTA.
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P flWATFP RTVFK NVAP VTflA. UT X X XX XXX - --
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rpnw RPCX CRFFK PIFAR CnI4AGVN MT X X
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-------
TAPI r 5. TRI#T F OF cTATIOTs MOIRE WATFR QI IAY ITY cnnCEITRAtIONS rxnroc CNTTWNIA.
0 f l650 7 Pn4
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MJ7PAH CPFFK NFAP MI7PAH. MT . XX XX
TflM(;I,f. PTVFR At qTATF T.IE NP UFrKFR MflU i i X XX
tflM(,I I RIVER R I , HAGTNC WOAN . XX
TOPIG IIF RTVFP AT MITES XX - - X  - - I I .ll)
PIII1pXJfl (11FF?  lEAR MIT.rs C7TY MT XX
IITTFP rwrvv AT ASHT.AO. 7. XX I) 0 n 77
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rIISTFR CPFFK MWAR KINSFY MT XX 1 A 14
(lrfl, ;,n 4 CPPYX NFAP IS1AV. MT. XX
GI,FtJOIVI CREFK NFAQ CI,FNRIVE Mt XX XX XV 7 #143
flEFR (PFFK MFAP Gt,FNU7l E Mt - - - I C - - -  - c
roTTnNw(InI) C RE K MFAQ INTAWF $T X A # 117
PFAVFR CRFFK At WI BA I IX MT X XX 17 # 1.17
couljppri, CREFK NP flECKFR. MT. - YX - - - -  n
n(l FflhIfl #1RFEY AT KIRRY Mt XX 7 n.i
Pocr 000 eRFEK MFAP CflI,STPIP. MT. XX XX XX X fl44
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O r [ ,Apv5 PORK YE? LOWSTOPJF Pt 1( 10 NEAR RFLFR 0 XX X I I
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f lOPIAR RIVFR At TNTERNATIONAI no XX XX 0 I I
POPlAR RTVFR NFAR SCORFY XX X A
POPLAR RTVFR APOVE WFST FOPK 1 MFA XX XX I i
POPlAR PTVFR NFAP POPLAR. ?T. XX XX I ?
WEST FORK POPLAR RTVFR NFAP PRED XX XX 17
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FAST FORK POPlAR RIVFR UFAP SCOB X X 17
POCK CPFFIC RFl flW HflR F CPF.FK. NE XX XX I ,
REAVFR CPFFK At INtEPMATIOMAT RO IINPARY _______ XX 4
PPPWATFR RIVFR AT CIRClE. U7 XX X 17
pFPWATFR RTVWR NFAR VIPA. MT. XX X I 
PRAIPIF FIX CRFIK Nf AR OSWU.fl MT - X XX
Il -K HTVFW AT NASHUA. T. X XX V i i
CROW ROCK CRFEK AEAR CAHAGEN MT XX
POXEI,DFR CPE K NVAP POCKY POX MT - V
NE lSON CPFFK NFAR VAN PORMAN. U7
MIISSFLSHFI.?. RIVER NEAR ROIJNPIIP, XX XX
IISSFISHFLI, RIVE P AT MP5RY MT. XX XX XX
flA p ? OPK RFI,IW MlscnL,A. Mt.
XX
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I #1 1 4
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A lESS TRA PS

-------
TAR I,F 5 . TAM F OF q A Tl9 5 wOtRE wATFR Q IAT jty cOUrEPITPATJONS FxrErns rRTTWRTA.
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VET,I,OWSTONF P1FP MFAR STD9FY. Mt. x xx xx
.!P!Y! ? T YP ] ! _ --   - -  - - ___ _ _  __ xx xx
PTWDFR RTVWR NFAR T,nrAE. J xx n xx
ij?PAH CREFK AT flI.IV . Mt. x
OTTFR PRFFK AT ASHIAMO. MT. 0
MIPSTVR CRFFK TWAP KINSFY MT xx
CLFNO 11/F CPEFK UFAP r.lFNOJIF Mt Xx
SOIIIRRFL CRFFK HR OECMFR. PIT. xx  
PI1SKRIJP rRFEK MEAR cfll.cTRIP. MT. xx xx
POSFPIIF) PRFEK AT MOUTH. HEAR R115 xx xx
RI( SAU l) C T AT WYUO T STATE LITHE 43 0
POP I,AR RTVFR NrAP SCOQFY x
POPlAR RTVFR HEAP PI)PI,AR. MT xx
EAST PO PlAR R!VFR A  TNTEPNATIO - - -  X -
FAST FflRK POPLAR RTVFM NT AP ccnn x
MTT,K RIVER At MASHITA. UT.  xx x
HET)SON CREEK HEAP A PIOPHAN. Uj xx
P IUSSFI ,cHFII. P11/E Q  tEAR ROIJMOIIP, xx
UUS5rl,SHETT PFP AT MOSTlY. MT. xx
x
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YET,IflW Tflh1ERi1/EQ NEAR Mturs Ctfl. Mt.
VET.l. OWSTONW RIVER NEAR .STOFY. MT.
POWDER RIVER TIWAR T.OCAE. UT.
t lPYW4f t Mic ,F t ttr; st: - -
UUSTFR CREEK NEAR K1SFY Mt
CUSTER CREEK HEAP K1PISFY Mt
n rA ;.LnN CREEK MFAP Ts AY. Mt.
CLEAR CREEK NEAR HOYT T
tIPPER SFVFMTLE CHFFK MEAR ITNOSAY MT
flEER CPErK NEAR GLENPTVE MT
flh(HORM P 11/EQ AT BTGUORN. UT.
POPLAR RIVER HEAP COMEY
POPj, R RIVER ARI)VF WEST EOPK, N rA
POPLAR RTVER HEAP POPlAR  PIT.
MFPT FflPK POPLAR RIVER NEA P RRFI)
FAST POPLAR RTVFR AT INTEPMATIO
FAST FORK POPLAR RIVER 4FAP scon
PO rK CREEK BELOW HORSE CREEK.
MI lK RIVER AT MASHA. 1.
11 - EF 
0 0 0 0 (4
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xx xx xx xx xx xx
xx - - - -
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-------
TARI,F 5. TARTE OF T1 TTUMS WHERE ATF K QUAlITY CONrE TPATIflI4S FXCII)S CRTT RTA.
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Vl,ATI 1EAD RTVFR AT ( OLIIDTA FAI ,LS X II
0fl94o CHloRIDE
I I I I t I l l
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XX XX XX XX
XX
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-------
TAP I r 5 . TARTE ()r cr  ri OHS WHERE WA 1 FR OIIATJtY cONCEMTPAtI O IJS rxrvrnc rNTTFRT A.
0
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uicsni,pi RTVFR WFAP rIIIHFRTS ON.
YE? I,OMSTOMF PIVj.P AT HUINtIFY. T
y , ,nwcTnor PIvFQ AT F ORSYt h.  IT  - -
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YFY,I,OWSTONF jvt y HFAR IFRPY. IT
YET.I.flWSTONF PIE HEAR STDHFY. MT.
PUPNS RFFV HEAR SAVAGF. Mt.
PoWUrk RIVER At MOORWEAD. MT,.
POWI)FR RIVVR PIFAP lOCAtE. MT.
MIFPAH CRFFI( At Ot,TVF. Mt
MI7PAH CPEFK NFAQ Hj7PAN. MT.
toM(; ,IE RIVWR At cTATr I,IIF NP OFCKFR MflN
tflPGIIE RTVFR At t ONG uE P DAM. NE
t(1PGIVE RTVFR NT. IIAMGTMG WOHAN C.
tONGUE RAT iPNFY flAy ACHflOV PR NP fIRM
tOPGilF R R I. RRANIENRFRG PRInCE,
tIJHGIIE RIVER At MILES ntty. MT.
P uMPKIN CRFEV HEAR LOECCU. Mt.
PUPKI?J CRFFK HEAR MTIIFS CITY MT
OTtER CRFEK HEAR OtTrR Mt
07TJ.P rwrrv REI n FIFTFEMMJI.F CPFEK MR 0
OTtER nRFFI( AT ASHT,AHD. MT.
HOME CPE K MVAP ASH IIANI1 MT
row ru FEK IEAR CflUSTPIP MT -
PRAIPIF nn Curry PflR RIRHFY MT
FAST TATI. CPEFK NFAQ flTtFP MT
MLISTVR CT7FFK N AP K1MSFY hit
CIJSTFR CRFFK p rg p K]H5Fy Mt
CHERRY CEFK PWAP tERRY MT
OFAT.IOM CPEFK NrAP ISAY Mt
CI.FAP CREEK MFAR HOYt IT
uipryR 5I. iFHMtIJF CRFEK HEAR LINDSAY lit
r,LFPJDIVP CRE VK NFAQ CI,FNDIVE t
DEtR CREEK NFAP CI,FMPI F Mt
rruttnownnn r Rr r WrAP INtAKE MT
REAVFR CPFFK At MIRA IIX Mt - - -
TIAPICINC W(IHAH CREEK R I, HORSE CREEK N P1
IAIIC,INC WI l L IAM nRFFK NEAR I3IRMEY.
SQUIRREl. CREEK NP flE KFR. MT.
POSEPIIrI CREEK HEAR rn,,c1RIP. Mt
POSFRUO CREEK AT MOUtH  HEAR P05
FAST FORK ARUFT,LS rprj.K Mfr AR Cf ! 1 -
ARMFT,Lc CREEK HEAR FORCYtH. MT.
SAPPY CRFFK NEAR HYSHA. Mt.
RICHORI RIVER HEAR St. XAVTFf. M
OIGHORN RIVER AT RIC.II)RN. r.
lItTlE RTC.IIOPN RTVFR  IrA Q HAPPIN
FlY CREEK AT PnMPEVS PTI.I.A 0 . Mt.
x x x x
x x xx x
xx xx xx xx
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xx xx xx xx xx
xx xx fl - xi x
xx x xx xx xx
xx xx xx xx xx
x x xx xx xx
xx
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V x xY
xx xx xx xx
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- t____ 0
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xx xx xx xx xx xx x x x x xY
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x FxCF 0S CRITERIA NV I 1 E VA 153 I.E cc PIA Q t
xx  rxrj. EI)5 CNITEWTA ,jY O()Ph, ThhAi P5*

-------
TARI,F S TARTS ElF SFATTUS WIF.RE WATFU O!IATI t Y cnhJrI .. TpAioNs Fxr Foc rv FFRTA,
0fl770 rYAMTnF
3* *3 * *3 ** * * * 3* * 3*
VEILOWSTONF PIVEP AT Ht Jtl,FY. 1 XX
7 n.co
0)034 rHPOITM
POWOFR RTVFR NFAR l0rAT E. MT. xx 4
USTFR CPFFK NFAP VINSFY MT XX
x
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flMc pn,,FTAO )l.pTy
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O LAR RTVFR AT TNTERNftTTOMAT. - - x x xx - j h - - I I O 45
PnPJAp RTVFR MFAR SCnHVY xx x x x t 44
PODT,AR RTVFR APOVE WFST FORK, HFA 0 n x x x Y X 11 .73
POPI,AR RTVFR NFAR POnlAR. MT 0 0 1 1) 17 0 .47
FAST POPlAR RTVFR At TNTEPNATTO x x X X I ) X 14 O 57
FAST FORK P0DI.AR RTVFR p W Q SC R X x x x x 17 0. 58
POGK CQF,FK RFT,OW IIORSF CQEFK.  IE x x xx xx x y o .cs
( 1CFArHFRH CPFEK AT INTFRHATI ONAL
REAVFR CRFFK AT TNTERNATTOPJAJ ROIiIflA Y x x x 1
REOWATFR RTVFP AT rIRrIE. UT, xx xx n xx xx xx xx xx xx xx xx xx I
RF.flWATFR RTVFR NFAP VTflA. UT. xx xx x xx xx xx xx xx xx xx xx t
PRAIPIF FT,K GRFEK NEAR OSWFGO T xx xx xx xx xx xx P
 IIK RTVFR A .Il,JE RERr, RPIP(W HFAR SACO xx xx xx x a x x xx xx i
I lK RTVFR A NASHUA. MT. xx xx 0 x x x x
(ROW ROCK GRWF,K NEAR C OHAGFN MT x xx xx
NElSON CPFFK NFAP VAN HORMAN. IT. x xx xx xx
TIMHFR (PEFK NFAR VAM POPIIAN. T xx xx xx xx xx xx
HALF RPFFD CREFK NFAP KLFIN MT xx x x xx xx xx x x xx xx xx
FAST PARPOT (RFYK HEAR ROIJNOI(p MT x xx xx xx xx xx xx
WfcI PARROT rwwrx yEAR Rflu ntlP M x x x x x x x x x x x
FATTTG (PFFP( NFAR OFIPTA MT xx xx xx xx xx xx xx xx xx xx xx
UUSSFIcHFTT PIVEP HEAR RO I INOIIP, xx xx x xx x x xx xx xx xx
-4 PIIISSFI,SHFI.T RIVER AT MflSfly MT. xx xx xx xx xx xx xx xx xx xx
SUP PIVFR VEAR VAUGHN. MT. x 0
M (Jfl0V rpFgv FAR VAUGHN. MT. n a x xx
UPOY (RFEK AT VAIIr,HN. MT. 0 x x xx 1)
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* * 3* * *3* *3* 3*3* 3 *
ISS nU RI RTVFR NFAP T,AMOSKY.NT
YEI.i,OWST ONF RIVER AT I,ALIPET T,
TONGUE RTVFR A PITES rity. T.
MIISTFR CPFFK NFAP IC IPSFY MT
CUStFR CDFFK NFAR KI SVY MT - -
(. [ FNOIVE (REFK NFAR Gl,FNOIVI MT
ROSFPIII( (RFFK AT MOUTH. E AR ROS
PICHflRN RIVED AT RTGWI)RN. T
POPlAR RIVFR NFAR SCOHFY
POPLAR RTVFR NFAD POPlAR. T.
RflCIc ChFrK RFLIIW HORSE C0l K. E
O  75
0  S l
x
xx
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xx xx
xx 7
xx
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x FxrEfl S GHITEUTA RY (l E THA 15 %  15 55 (IA P59
xx rxrv nc rpyrrw,A MV -I1E rA P5

-------
TAP , 5 TRRT E flF cTATTIIS WH .PF WAT P QuAlITY Cfl,IC ITPAT1nNS FXC F1)c rRTTFMTA.
- .TA I FFR MA Abp  P A JuI IUI, -- A(; rT u V flr I. VCII I l tI(
r 1  I Pl Aj, JTy
DRl 1 1F WI (R EV JEftK OSWF(Q MT XX 2
MIlK vn AT MASHIA. MT. - - --  - - XY   - - -
MET.SQN CQFFK N AP VAM PlQPMI N. PT. n n ciu
uu.ssFI.cHci.T. Q VF.P JFAR RflhJMflhlP X I ( . 1
pu(J sJ c J, , P1FP AT pur py  - X - - - - ii - - - - -
CI,APl( FflQK BFI,flW NTS nhlLA MT. X
LATMFAfl RTVFP AT CUT,1 19R1A FIU,T.S XX 1
otoci IFAI )
** ** * $ $ *$* **$ *
MIISTFR CPFFK OFAR YINS Y MT XX I
01092 7.IMC
IJSTFR CPEFK IIFAP VTMSFY MT X XX 2 1.00
( IFNflIVF (PEFK NFAP T.FNnIVF MT X I I .00
01077 CAOMTUM
MIIST CPFFK NFA KT SFY $T Y 7 fl60
POCK CPF K RF1,flW HOPcF CQ FK. PIE X oco
PR0CFSSTM( CflMPbFT WOP PF0 lFSTFn PERIflO
(.)
.,
.

-------
Table 6. Water Quality Trer ds
Stations and Parameters where Significant Statistical Differences were Observed.
Legend: I Improving Trend; = Degrading Trend; * = Parameter concentrations are at high levels.
Station
e
.
i-
41

C
41
o
0
a
0
.
0.

n

0
,,
0
V
>

0

i
.
0
&,
0
41

c
41
.
e

C
.
41
41

4 I


4..

E



1

a
C
.



Missouri R biw Canyon Ferry Darn
D
Missouri R at Virgelle
D
&
Missouri R biw Ft Peck Darn
0
D

I (
0 (

jeld
02 &
0
I

0

0

D
D

0

D

D
0
2n-
Missouri R nr Culbertson
T
03)
St Mary R at Intl Bdry
0
Yellowstone R nr Livingston
D
Yellowstone R at Billings
0
D
D
0
Se
Yellowstone R at Huntley
Ds
D*
D
Yellowstone R at Forsythe
0
D
D
Yellowstone R nr Miles City
0
0
D
Yellowstone R nr Terry
0
D
D
Yellowstone P nr Sidney
D
Powder R nr Locate
D K
U
D*
D
Mlzpah Cr nr Mtzpah
D
0*
0
D
Tongue R at State line
D
0%
0*
Tongue R at Tongue P Darn
0
D
0
D
D
Tongue P blw Hanging Wanan Cr,.
D*
0
D
Tongue P blw Brandenberg Br
0
D
0
Tongue R at Miles City
0%
0
Ptunpkln Cr nr Miles City
D%
0*
D
D
Otter Cr at Ashland
0
0*
D
Hanging W nan Cr nr Birney
Squirrel Cr nr Decker
I
I
D
I
0*
D*
I
D
D
74

-------
Table 6 (continued). Water Quality Trends
Stations and Parameters where Significant Statistical Differences were Observed.
Legend: I = Imeroving Trend; D-Deqrading Trend; * Parameter concentrations are at high levels.


U,




-
-
UI
0
in

I-
o
.
.


0
V I
0
in
Station
in
i_



C

C I
e

z
0

>
g
.

0

o
C


in)
in


in



Ui
in



IJ
I. .)
in
1
in


n


Z
Rosebud Cr nr Coistrip
D
Armells Cr nr Forsythe
1*
Bighorn R nr St Xavier
I
I
Bighorn R at Bighorn
I
I
D
D*
Little Bighorn R nr Hardin
D
D
D
Poplar R at Intl Bdry
0
D*
0*
Poplar R nr Scobey
D*
W Fork Poplar R nr Bredette
D
0 As
E Fork Poplar R at Intl Bdry
0
0
1
I
E Fork Poplar R nr Scobey
I
Beaver Cr at Intl Bdry
D
0 
Din
0
D
lig
Redwater R at Circle
Redwater R nr Vida
0*
Timber Cr nr Van Norman
D -
Din
0
W Parrot Cr nr Roundup
0*
0
D
Fattig Cr nr Delpia
D
D*
D
 usselshell R nr Roundup
i
T
Beaverhead R nr Twin Br
D
0
0
Lake Koocanusa at Intl Bdry
0
1
0
0
D
0
0
 _-
_
Lake Koocanusa at Ten Mile Cr
0
I
D
Pb
Lake Koocanusa at Forebay
I
D
1
0
Pb
Kootenai R biw Libby Darn
I
D
75

-------
Table 6 (continued). Water Quality Trends
Stations and Parameters where Significant Statistical Differences were Observed.
Legend: I = Improving Trend; D = Degrading Trend; * Parameter concentrations are at high levels.
Station
0 0
(.,  ,
dI
0
C
 I 0 > 0 a
1. 0  C  V
V 0 0. 0 a C 5 I-  
. t. . 0. o I  0 u
.2 :
I,,  =
Birch Cr Nr Valler
I
Otter Cr Nr Otter
0
Cottonwood Cr Mr intake
I
Big Sand Cr at WYIll Line
I *
Poplar R Hr Popar
D
I s
D
Milk R at Nashua
0 
Little Peoples Creek

.


-
-
-
-


0
-b--
Marias R Nr Chester
I
Zn
iI
E
E
I

P
;
I
E
EE

76

-------
NORTH OA O
Nitrogen
Table 7. Rankij q of Critical Water Quality Stations by Pollutant Group
Fecal Coliform
Phosphorus
Exceed.
Mos.
Conc.
Prob.
Excd
/l
1.
Red River of the North -
Fargo
0.50
3
935
1.
Red River of the North at
Haistad, MN
1.00
9
1.95
2.
Red River of the North at
Hickson
0.89
6
1.78
3.
Souris R nr Foxhoim
0.83
9
1.62
1.
Red River of the North at
Haistad, MN
1.00
9
0.30
2.
Red River of the North -
Fargo
0.62
9
0.27
3.
Souris R nr Verendrye
0.78
7
0.35
4.
Red River of the North at
Hickson
0.89
6
0.20
5.
Bois de Sioux R-Wahpeton
1.00
4
0.25
6.
Red River of the North -
Grand Forks
0.80
8
0.15
7.
Souris R - Kramer
0.70
7
0.15
8.
Sourls R - Towner
0.58
7
0.15
1.
Souris R nr F3x c
0.54
6
5599
2.
Souris R nr Sherwood
0.83
10
718
3.
Souris R nr Verendrye
0.70
7
660
4.
Park R on 1-29
0.63
5
880
5.
Forest R biw Minto
0.67
6
625
6.
Park R blw Park River
1.00
3
774
Dissolved Solids
77

-------
Table 7 (Continued). Ranking of Critical Water Quality Stations
by Pollutant Group
No. Avg.
Exceed. Mos. Conc.
Suspended Sediment Prob. Excsd mg/i
1. Pembina R at Waihalla 0.54 3 1063
2. Pembina R nr Vang 0.58 3 832
3. Little South Pembina R nr
Waihalla 0.45 3 409
4. Red River of the North at
Hickson 0.67 4 96
78

-------
tAP I r 8 TAB? F (IF cTATToMS WI IEPE WATFR OllAt ItY CONrLNTRATIOI4S FXCFFOS rRTTFRIA.
,1APC frR NAP ATP
MAY JiIi1 iIJt, A l Ir, !%FP o ct 110k ?
nr c t in  ( rjn n r
nj;c pn ,nj n l 1T Y
u n - - - -
P 1 .0 PT 1 OF TI lE NORTH t I I ? (KS(1W (411 X X
P111 TVFQ OF T IlE NORTH AT IIAISTAP.MH --  Y - X XX
cu  IPTS RTVFR liP cHrpwtinn. (II) XY TX
cOURTS H  TflWMFP. N f l ______ TX
co uRTs P KPAUFP ?IoP1-u OAKO TA X
F(IPFST P 8 MTI,FS EAST OF NTNTO
11616 FIt! fl iI1 - - - - -
P uTS or c nipy P  WAWPFTON. r)
a FAP O tin - - -  -
A K RTVFR ?V T.flQ NORTH DAKOTA X
FORFST P 8 ?U(,F5 FAST OF MTNTO X
316 75 Fru: r o n
PFO RIVER OF Till NORTH At HA? ,StAfl. NP?
S(I IRTS PTVFR N FOTHO II. N
PfRTPIA RIVER AT WAI,HA?,IJA. NO
PEMATNA IE lR VANC. 1.Ifl
31 1 11 tOt flit.!
i****t*4*t*ts**t* - -
cIH IRTS RTVFR NP SHFRW000. M
0 06 00 lfltAi.
RFfl PIVFP OF TUF NORTH At HTCKSON., N
PEfl O i l / FR OF TUF NORTH At HAI,STAO. MU
Cfl ht fl5 RTVFR liP SHFPWOOI). NI)
coflpts tvr nrn FOYHOI,U. NO 
PEMBYNA RTThP AT WAI,HAILA. NO
K
X XX
0 (1
X
0670 P 1 0 3 N
S 5S * 5* 5 . 5* 5 5*
R oT s pr STOUT P a IAIPFTON.  II )
P I I P  FARr,O. tin
XX
X XX
.1
II A_l i 
00610 PIri Plo1
PE RTlEP OF TF NORTH 4t nincon. on
Efl p l u m OF Till NORTH j T IA?SAn. I I !
,ru;r9n. 0 rxr Ff15 CRTTrRTA NY I rcs 1IIA 15
X rxrpros rRTTrHTA BY OAF. l ilA  1S  rss TWA q t
YX rXrmrI,s rWTlLHYA BY il liP , THAI P5
0 A .1I
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-4
to
0 A.i1
-- - j
2 A.Sui
A_c t )
1 A 1
- -  - - )flC-- A 
4
4 A 75
1
A A9
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6  1(1
06615 Nfl ? aN - - - -
sSs*st*s**S*S*S* 
SfltlPTS RTVFR NP S IIWPW000. I I I)
V Y T O
X I i
X
0
X IA A .I 1
2A AA5
V X XX K K
LV X V XX X V V
V X X TX V
-n Ic b -  V
0
I A
I ?
j
 1
I 00
A.A1
A 11
XX

-------
API,F 8 . TAUt F OF cIATIIIHS WIll P . WAIFU ()IIAT IlY CO IJCFPITPATIOIJS FXCFFpc CHTTFHTA.
Ofl6Fib PHOSTOT
i, *$*$,****$*$***
UUTS flF MOllY P  ANP TflN. M I) X X YX
Pf0 PTVFP OF Till IIORTH AT tI1CK l)N. NO XY Y XX
Pf0 P  FAPGO. N XY XX XX
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TA IY 8. TART F; 1  STATTIJ1S WHERE WATFR QII ,1Ty CflPICF;TRATi N FxrE nc rpTIFRLA.
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TAPIJF 8 flMT.F l IP TATTONS W!IFPE WATFR (Jcl I, ry cnNrEuTpATtnh ls rxrrroc CIIT1FWTA.
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-------
Station
Re R of ike NGrth-Vargo-
P d R of the North at Haistad, Ml
Red R of the North at Grand Fork
Souris R nr Westhope
PEnbina R nr Yang
Sheyenne R at Lisbon
Sheyenne R nr Kindred
Wild Rice R nr Abercromble
Missouri R nr Williston
IMissou r i R nr Garrison Dam
[ Missouri R nr Garrison Dam
Missouri R at Bismarck
Missouri R nr Schmidt
James R nr Manfred
James R at Lamoure
Buffalo Cr I b. nr Gascoyne
Cannonball R at Brelen
Heart R nr South Heart
Square Butte Cr biw Center
Knife R at Hazen
Little Missouri R nr Watford City
Bear Den Cr nr Mandaree
Table 9. Water Quality Trend Table o r:; : , -A
Stations and Parameters where Significant Statistical Differences were Observed.
Legend: I Improving Trend; Degrading Trend; * = Parameter concentrations are at hagh levels.
83

-------
Table 9 (continued). Water Quality Trend Table
Stations and Parameters where Significant Statistica O fferences were Observed.
Legend: = Improving Trend; Degrading Trend; * = Parameter concentrations are at high leves.
Station
5

I-



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x
Deep R nr Upham
I
I
Little S P nbina R nr Waihalla
0
Park R on 129
I
Forest R nr Mlnto
1*
Goose R nr Hilisboro
I
D
DMg
8eaver Cr nr Finley
I
Sheyenne R nr Warwick
0
Sheyenne R biw Baidhill Dani
I
Sheyenne R - Valley City
I
Baldhill Cr nr Dazey
I
I
D
Pilot Drains at Oakes
0
 -
D
Cannonball R at Regent
I
Elm Cr nr Golden Valley
I
Charbonneau Cr nr Charbonneau
D
I
I
I
I
IL
I
I
84

-------
Table 10. Ranking of Critical Water Quality Stations by Pollutant Group
No. Avg.
Exceed. Mos. Conc.
Fecal Coliform Prob. Excd rng/l
1. Whitewood Cr biw Deadwood 1.00 12 57539
2. White R nr Kadoka 1.00 5 20000
3. Bad R nr Ft. Pierre 1.00 2 35000
4. Cheyenne R biw Plainview 1.00 3 16640
5. Cheyenne R nr Wasta 1.00 1 35000
6. White R nr Oglala 1.00 2 8200
7. Rapid Cr biw Rapid City 0.71 5 4410
8. S Fork Grand R nr Bison 1.00 1 11000
9. Big Sioux R nr Richiand 0.67 8 1747
Nitrogen
1. Cheyenne R at Edgemont 1.00 1 64.2
Phosphorus
1. Rapid Cr biw Rapid City 1.00 7 2.11
2. Big Sioux R - Brandon
to Richiand 1.00 12 1.21
3. Rapid Cr nr Farmlngdale 1.00 12 0.72
4. French Cr nr Custer 1.00 12 0.76
5. Box Elder Cr at New Under-
wood 1.00 7 0.97
6. James R abv Mitchell 1.00 12 0.36
7. Whitewood Cr blw Deadwood 1.00 11 0.33
8. White R nr Oglala 1.00 9 0.27
9. Little White R nr White
River 1.00 8 0.27
10. Fall River at Mouth 1.00 1.2 0.17
Dissolved Solids
1. Cheyenne R at Edgemont 0.75 9 3648
2. Belle Fourche R nr Elm
Spgs 0.42 5 2544
3. N Fork Grand R nr
Shadehill 0.56 5 2622
4. Bad R nr Ft Pierre 0.50 4 3650
85

-------
Table 10 (Continued). Ranking of Critical Water Quality Stations
by Pollutant Group
No. Avg.
Exceed. Mos. Conc.
Dissolved Solids Prob. Excd mg/i
5. Horse Cr nr Vale 0.33 4 3466
6. Moreau R nr Whitehorse 0.60 3 2450
Suspended Sediments
1. White R nr Oacoma 0.78 7 7077
2. Cheyenne R at Cherry Cr 1.00 9 1750
3. Belie Fourche R nr Elm Spgs 1.00 10 1124
4. Moreau R nr Whitehorse 0.67 581
5. Big Sioux R at Akron, IA 0.89 8 182
86

-------
?API,F 11. TAI*IF OF STA1TONS WIIIPE WATFP QuAlITY CrINrE TPAT1ONS FXCFFOS CRTTFRTA.
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PjC SIOUX P AT AYRON TA XX 24
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-------
TAO I,F i i :. TART E 1)? ST1tTTONS WHERE WATCH Q UA ! I tY CnUrEMTRAtIflNS vxrEruc rpITrRTA.
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WHITE P WEAR DACOMA SI) X XX XX XX
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CHEYEN NE P AT CHERRY CREEK Sfl X XX XX
(HEYENIE P NEAR FACILE RUTIE SI) X
PEltS FOURCHE P AT WYSD STATE L xx xx xx
PEILE En hlarHE P EAR STUPGTS SI) xx
PEI.1 4 E EI7IPCuE P NEAR El N SPRINCS X X
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CHEYENNE P NEAR FACIlE PUTTE Sn - - - - 
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T( STOIJY DIVEP AHOVF NATEPTOWN XX XX IX 0 XX X XX 0 1)
RTr SIOuX NEAR WFR rnwt4 XX XX X X XX XX XX xx xx xx jo
Rj( SIOUX RIVER CEHF:l ADy ROAD XX X X X X XX XX XX X X 17
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RT( Sioux PIVF.R NEAR IWLT. PAPIOS XX XX XX X XX XX XX XX X X II
PI( SiOUX R1IER TNSTOUX FAl,lS ________ XX XX X -- XX XX - XX - XX XX X X 12
.cTflhPX RIVER AT BRANN1N S OAK XX x cx xx xx XX XX XX XX XX XX 14
flf( SIOuX RIVER AST OF CANTON XX XX XX XX XX XX XX XX XX Xx XX XX 31
nic sinux plvF.p FAST OF h4UflSflR XX XX XX XX XX XX XX XX XX YX XX XX 17
R1( SI UX PIVFP SE OF AI,CESTFR XX XX XX XX X XX XX XX XX XX XX XX 1
PI SIOUX RIVER NEAR RTCHLAND SD xx xx xx xx x xx xx xx xx xx xx xx i
VF .Pp4TI Y,IflN RTVPR U O CIIANCET,1,OR _____ XX XX X fl X XX 0 11
VEDHTLT.1nw R NFAP WAXONDA fl XX XX XX XX X XX X X X 17
1AUFS PIVFP NEAR HFC!,A XX XX XX XX XX X fl 0
?AMES PTVFP NFAP STRATFOPO XX XX XX XX XX XX XX 1) R
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1AWS PIVFP ARm /F WITCIJ T,t. XX xx XX XX XX XX XX XX XX XX XX XX 17
jANFS PIVFP flET,O UITCI4ET,L XX XX XX XX XX XX XX XX XX XX XX XX 17
TAIIES P11/FR NORTH OF YANKTON - XX XX XX XX X XX XX XX XX X XX XX 17
KF.VA PAHA RIVER t A WFWFliA XX XX X 0 0 XX X 0 X
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XX 4
- XV - - 4
(,Fr.FNn ( I rxrErl)s rRTTFRTA 1 kV tESS TiA I 5t
X rxrrrns CRTTVRTA RY P(IRf ThAN I it c; I ESS TUA 1 ( 5*
XX  rXch rDs rpTlFWIA 1kV lInt rIIAI PS
4 ( .7 5
A 75
A

-------
n.7L 1
fl7.
 .13
TAPI,F I I. TIAR I r jr CTATTOtS WHEPE W TFR (JlM ITY cONrFNTPATIflNc rxrp nc rRITFI4TA.
,IAM F R - UAP ADR MAY 4 1 11N iii !. A G S P g I rT n f l  , rgr 
oin;i IFRI)
3** 5* 5 5 5 5* 5 5 5 5 5 5 5
WHTTF P NEAR OACPMA sn - - - X X
OI017 7TC -
4IITTF P IfAP OACPMA Sfl XX
rnFyFuF P At rprppy CPEFK 5fl X
01077 rAnNTIJ
* * *s*s*S**Ss**S$*
.IAMF.S P AT CnutIMnIa sn I
WIITTF P PIFAR OACPM& cn XX
ppncrsclnr. (nMPI.FTF Fop PEflLIFSTPP PERIOD
Ptj; i- y( ri ni Pr
prgiua , fl ! JTy
4
0
C u

-------
Table l2 Water Quality Trends
Stations and Parameters where Significant Statistical Differences were Observed.
Legend: I = Improving Trend; 0 = Degrading Trend; * = Parameter concentrations are at high levels.
Station
0
0 0
I
In

a C L. a i 4 1 In
z >
a Q. 0 a Z alt c 
I I 0 U a
2
Missouri R at Qahe Dam
D
D
0
D
0
0
0
Mg
Hg
Missouri R at Pierre
0
Missouri R at Big Bend
D
I
D
Missouri R at Ft Randall
0
I
D
DCd
Big Sioux R abv Watertown
I
I
I
Big Sioux R Mr Brookings
I
Big Sioux R Mr Dell Rapids
D
D
I
DH 9
Big Sioux R at Sioux Falls
I
0
I
Big Sioux R at Brandon
I
I
D
I 
Big Sioux R Mr Canton
D
I
I *
Big Sioux R Mr Hudson
D
0
Big Sioux R Mr Alceste
D
I ;
Big Sioux R at Akron, IA
D
D
Big Sioux R Mr Richland
0
James R Mr Hecla
I
James R at Coltmibia
James R Abv Huron
I
I
I
:
James R at Huron
D
James R abv Mitche l
James R Ur Scotland
D .
I
0
I
I
James R Abv Yankton
D ;
0
Keya Paha R Mr Wewela

11
0 .
D .
1
I
I
L
96

-------
Table 12 (continued). Water Quality Trends
UTH DAKOTA
- Stations and Parameters where Significant Statistical Differences were Observed.
Legendi t = Improving Trend; = Degrading Trend;  = Parameter concentrations are at high levels.
Station
1
0 0
0 0
v, v, I
u
0 0
L. V V V
 41 0 > 0 5 V 0
L D .
41 0 0. o a c a I- 
 1_ 4 ) 0. 0 1- 0 V

Z D. C < LI
1
v
4 1



= Z
White R Hr Oglala
I
White R Mr Kadoka
D
0*
White R Mr Oacorna
-
0*
D
-b--
D
Little White R Mr Whlte River
Cheyenne R at Edg nont
I
Cheyenne R blw Angosture Darn
I
I
I
Cheyenne R Mr Buffalo Gap
0*
Cheyenne R Mr Wasta
D
Cheyenne R at Cherry Cr

-
-
--
Zn
Cheyenne R Nr Eagle Butte
I
0
Belle Fourche R at Wy-SD Line
D
D*
0*
Belle Fourche R Mr Belle Fourche
0
0
Spearfish Cr at Spearflsh
0
Rapid Cr Mr Rochford
I
Rapid Cr blw Pactola Darn
I
Rapid Cr abv Rapid City
D
D
I
I
Rapid Cr Nr Fanningdale
Battle Cr Mr Keystone
Freich Cr Mr Custer
D
0
0
0
French Cr in Custer St. Park
D
Grand R Hr Little Eagle
Grand R at Shadehill N Fork
Grand R at Shadehill
0
I
I
I
I
i
97

-------
Table 13. Ranking of Critical Water Quality Stations by Pollutant Group
No. Avg.
Exceed. Mos. Conc.
Fecal Coliform Prob. Excd mg/i
1. Jordan R at 1700 S, SLC 0.71 5 5557
2. Virgin R at Bloomington 1.00 7 587
3. Jordan R at 5800 S, Murray 0.38 5 2208
4. Paria R at White House Ruins 0.33 3 1735
5. Virgin R at Littlefield 0.50 5 552
Ni trogen
1. Jordan R at Cudahy Lane, SLC 0.53 6 4.34
2. Jordan R at 1700 S, SLC 0.60 5 4.57
3. Jordan R at 5800 S, Murray 0.53 7 3.70
Phosphorus
1. Jordan R at 1700 S, SLC 1.00 10 3.56
2. Weber R nr Plain City 1.00 11 1.05
3. Jordan R at Cudahy Lane, SLC 1.00 9 1.06
4. Jordan R at 5800 S, Murray 1.00 11 0.57
5. San Juan R at Shiprock, NM 0.92 11 0.46
6. San Juan R at Bluff 0.80 7 0.35
7. Green R at Green River 0.80 7 0.30
8. Bear R at Corinne 1.00 10 0.18
Dissolved Solids
1. Bitter Cr nr Bonanza 1.00 5 12576
2. San Rafael R nr Green River 1.00 8 3163
3. Ferron Cr nr Clawson 0.92 10 2284
4. Price R at Woodside 1.00 7 3284
5. Virgin R at Llttlefield 1.00 11 1854
6. Paria R at White House Ruins 1.00 10 1751
7. Muddy Cr nr Hanksvllle 1.00 6 2258
8. Virgin R at Bloomington, AZ 0.89 8 1758
9. Jordan R - Murray to SLC 1.00 10 1100 
10. Duchesne R nr Randlett 1.00 10 1046
98

-------
UTAH
Table 13 (Continued). Ranking of Critical Water Quality Stations
by Pollutant Group
No. Avg.
Exceed. Mos. Conc.
Suspended Sediment Prob. Excd mg/i
1. San Juan R nr Shiprock, NM 1.00 12 5877
2. San Juan R nr Bluff 0.92 8 5268
3. Green R at Green River 0.92 8 5264
4. Muddy Cr nr Hanksvilie 1.00 5 6130
5. White R nr mouth 0.91 7 2428
6. Price R at Woodside 0.88 5 1901
7. Virgin R at Bloomington, AZ 1.00 7 516
8. Colorado R nr Cisco 0.82 6 683
9. Virgin R at Littlefield, AZ 1.00 6 480
10. Bear R nr Corinne 0.89 7 178
Trace Elements
1. Jordan R at 1700 S, SLC 0.80 5 (Hg)
99

-------
TAPLE i4 TAME OF STATI(NS WHERE WAT ROI]ALITY CONCENTRATIONS EXCEFOS CRITrIPTA.
JAN FEB MAR APR MAY JUH JUL AuG SEP OCT NLV fl C NIP.
OFiS
0C 130 0 DO
PARIA R. AT WHTTE HOPPSP RUINS JR GLEN  - - -- -
CR .EPJ RIVER AT GREEN RIVER. uTAH X
PRICE RIVER AT W000SIOF, UTAH XX
.JDRIAN PTVER P 1700 SOtJTH SAT,TLAKt CT 
JORDAN RIVER P CPPDAHY LANE MR SALT LAKE X K K
3 162 5PTCC1Th1  - - - -
*S 5* 5* 5* * 5* 5* 5* 5*
REAR RIVER APUVE RESERVOIR NEAR WOODRUFF K
PEAR P AT RORDER WY ____________ _ X
RIAR R HR COPINP4E 0 K 0 K XX XX
COlORADO P AT LFFS FERRY. AZ. XX
VIR(1N R AT D1,00MINGTON.UT X XX XX - XX XX 
VIPGILI P AT LITTLEFIELD, AZ XX XX XX X 0
PARIA P. AT WHITE HOUSE RUINS HR GLEN CA XX XX XX
GREEN RIVER AT-T.REflr-RTVER; UTAH  -- - - -- - - -
WHITE RIVER AT NOUTH NEAR (PUPA! UTAH 0
DOL.(1RES RIVER NEAR CYSCO, )JT, X
JORDAN RTVEWTS800 SO MURRAY UTAH - - XX XX XX XX  --
JORDAN RIVER 1700 SOUTH P SALT LAKE CI XX XX XX X XX
JORDAN RIVER P CIPl)AHY LANE HR SALT LAKE X XX XX XX XX
SEVIF.R RIVER NEAR LYNtJDYL,UTAH- - O --  -
RIVER NP PLAIN CITY UTAH K K
JORDAN RIVER 0 5800 SO MURRAY UTAH XX XX XX XX XX
31501 TOT COb!
** $ 5* * * * * 5* 5* *5* 5
WHITE RIVER AT MflUTHNFAROURAYlJTAH  XX -- - -
JORDAN RIVER 0 5800 SO MURRAY UTAH XX XX XX XX XX
JORDAN RIVER P CUDAHY LANE NP SALT LAKE XX XX XX XX
JORDAN RIVER P SROO SO MURRAY UTAH -XX - XX - XX - XX - XX -
00600 ToTAl, N
---- --- ---- - - -- - - _--- ------
SAN JUAN RIVER AT SHIPROCK. NH X
PRICE RIVER AT W000SIDF, UTAH 0
WHITE RIVER AT MOUTH NEAR OURAT-1ITAH -- ---0 -   -  - --- x - -- - --- -  -
DOlORES RIVER NEAR CT$Cfl.UT. 0
JORDAN RIVER 9 5800 50 MURRAY uTAH 0 0 K 0 0 0
JORDAN RIVER 0 1700 SOUTH P SALT LAKE CI - X O  - K - -
JORDAN RIVER P CIIDANY LANE NP SALT LAKE X X 0 X K K
JORDAN RIVER P 5R00 SD MURRAY UTAH 0 0 X 0 0 0
00665 PHOSTPT
5* 5* 5 *5 *5* 55* 5 5*5
BEAR RIVER ABOVE RESERVOIR NEAR WOODRUFF X- - XX XX - - XX XX 12
REAR P Al RORIWH WY K K 12
LEGEND) 0 FXCEEDS CRITERIA BY lESS THAN 15%
- XaEXCEEDS CRITERIA BY MORE THAN 15% &LESS THAN 85%
XX EXCE .DS CRITERIA BY MORE THAN 85%
1 XCF.EDF 1JCF
P ROB AR IL. I TV
9 0.13
7 0.14
P 0.13
31 - 0,09
1? 0.33
17 0 .OR
12 0;25
9 078
32 0,OR
- 1 fl0
10 0.50
9 0,33
P -0.13
8 0.13
6 0.17
13 0;38
7 07 1
14 0SA
5 0;20
9 0.22
13 03 8
8 0.13
32 0.50
14 0.36
12 0.50
12 0.08
9 0.11
X 11 0.27
7 0.14
K 17 0.53
K 10 fl;60
15 0.53
K 37 - .53 .
0.50
0.17

-------
TARIE 14. TABLE HF STATIONS WHERE WATER QUALITY CONCENTRATIONS LXCI EOS CRITERiA.
JAN FEB MAR APR MAY JUN JUL. AUG S .P OCT NOV DEC
REAR P HR COPINME - X1XXX XX XX - XX XX XX XX X
COLORADO RIVER NEAR CISCO UTAH XX XX XX
COLORADO RIVER AT HIGHWAY RRTI)GI NP HOAR XX XX XX
COLORADO P ABflVF MI T . cRFEENP:AR HOAR UT- - XXXX XX - - -
VIRGIN K AT LITTT,EFIELO, AZ X
PAPIA P. AT WHITE HOUSE RUINS NM GLEN CA XX
SAN J(JAN RIVER AT SHIPR0CE NM XX XX - XX XX XX - XX - X X
SAN JUAN RIVER NEAR flI,iIFF, UTAH XX XX XX XX XX XX XX
GRFfN RIVER NEAR GPEENUALE, UTAH X XX
c,REFNRrVEPA1GREFT1RTVER7UTAH XX X  XX XX - XX - - - - X - X
COTTONWOOD CR.ABV STR.CANYON.NR ORANCEVI XX
PRICE RIVER AT W000SIOE, UTAH X XX
WHITE RIVER AT NOUTH I3FAR OURAY UTAH  XX X XX - - X - - - - - -
OIICHFSNV RIVER HEAP RANDLF.TT. UTAH XX X XX
DOLORES RIVER NEAR CISCD.HT. XX X
JORDAN RIVER H 5800 50 MURRAY UTAH XXXXXXXX-XXXX- XX - XX --XX - XX XX
JORDAN RIVER H 1700 SOUTH H SALT LAPE CI XX XX XX XX XX XX XX XX XX XX
JORDAN RIVER A CIIDAHY LANE HR SALT LAKE XX XX XX XX XX XX XX XX XX
SEVIER RIVER14EAR LYNHDTL;UTAH X XXX XX
WEBER RIVER HR PLAIN CITY UTAH XX XX XX XX XX XX XX XX XX XX
.JQRDAN RIVER 5800 SO MURRAY UTAH XX XX XX XX XX XX XX XX XX XX XX
00650 T P04
PEAR RIVER APOVE RFSERVOIRNEARW000RUEF XX -
REAR R AT BORDER WY XX
REAR P NP COPINNF XX XX XX
COlORADO RIVER NEAR CISCO IJTAH - --  XX  - - - -
COl,ORAIM1 RIVER AT HIGHWAY BRII)GE HR MOAB XX
COLORADO P ABOVE MILL (REEK NEAR MOAB UT XX
SAN -JUAN RIVER AT SHTPROCK;NM -- - XX_XX_X - - -
SAN JUAN RIVER NEAR BLuFF, UTAH XX
GREEN RIVER AT GREEN RIVER. UTAH XX
PRICE RIVER ATWOODSTDE; UTAH XX 
WHITE RIVER AT MOUTH NEAR OURAY UTAH XX
I1UCHFSNE RIVER NEAR RANDLETT, UTAH XX X
flOL0RES-RIVERt IEARC!SC0.UT. XX -
JORDAN RIVER H 5800 SO P1IIRRAY UTAH XX XX XX
JORDAN RIVER 9 1700 SOUTH H SALT LAKE CI XX XX XX
JORDAN RIVER H CUDAHY LANE NP SAT,TLAKE  XXXX XX
SFVIFR RIVER NEAR LYNNOYL. UTAH XX
WERER RIVER HR PlAIN CITY UTAH XX XX XX
JORDAN RIVER H 5800 SO MIJRRATIJTAH - - - - XXXX XX
70300 RESIDuE
-- - ----- -- ---- ______- ----- -- - - - ------ --- ---_ -  - 
BEAR B MR CORINNE X X X XX XX XX XX X
COLORADO RIVER NEAR CISCO UTAH X X X XX X X
COLORADO RIVER AT HIGHWAY BRIDGE NB MOAR - X X X X -- - -- 0 X XX - XX
COLORADO R APOVF MILl. CREEK NEAR MOAB UT X X X X 0 X XX XX XX
LEGENDI 0 XCEEI)S CRITERIA BY LESS THAN 15%
X -EXCEEDS CRITERIA NY MORE THAN 15% & LESS THAN
XX EXCF.E.D& CRITERIA BY MORE THAN 85%
NIu. .XCFFDPNCF
ripS PROBABILITY
II 1.00
tO 0,40
8 0.50
10 - 0.40
3 ( 1 ,13
1 1.00
1? n . 2
10 0.90
11 0.18
10 0,80
2 0.50
9 0.33
11 ---0.36
10 0,30
0.29
17 - - 1,00
11 1.00
35 1.00
10 - - 0,40
11 1,00
17 1.00
- 033
3 0.33
3 1.00
2 -- 1.00
2 1.00
2 1.00
3 1.00
2 1.00
2 1.00
2 -1300
8 0.13
3 0.67
2 - 0;50
5 1.00
3 1.00
5 1.00
2 0.50
1 1.00
5 1.00
It 0.82
10 0 . 1 10
tR fl.72
19 0.74
-4
>
=

-------
COlORADO R AT LEES FERRY. AZ.
VIRGIN R, AT BL( flMTNGTOFJ,UT
VIHCTN P AT LITTIFFIFID. AZ
PAPIA P AT WIITTE 1 100SF PluMs NR GLFPJCA
SAPI lUAU RIVER AT SHIPRIICK. MM 0
SAN 311AM RIVER NEAR PIUFF, UTAH
GREEN RIVER NFAR GPEENDALE UTAH0
GREEN RIVER AT GRESFN RIVER. UTAH X
SAN RAFA E II RIVER NEAR GWFEfl RIVER, UTAH XX
Pp TcrPTVEWAr-W 0 00sTnE UTAH
WHITE RIVER AT MOUTH hEAR OURAY UTAH
HElLS HOLE CAN AT MOUTH NP WATSON UT
DIICHFSNE RIVER NEAR RANDLFTT;- UTAH
DolORES RIVER NEAR CISCO.I)T.
JORDAN RIVER 0 5900 50 MURRAY UTAH XX XX
JORDAN RIVER P 1700S ITHRSALT1iAKE CIXXXX
JORDAN RIVER P CIIPAHY LANE NP SALT LAKE XX XX
SEVIER RIVER NEAR lYNNOYL, IJTAH XX
JORDAN RTVERB 3800 SOMURRAY UTAH XX
I XCEEDFNCI
rP(iI ADJ LITY
I .00
0 8Q
I .00
-- 1.00
0.25
0.50
0.36
0  70
1.00
I .00
0 73
I  00
1.00
0.71
1.00
-- -0.91
0.93
1.00
t;00
X X
X
-_----- - ---_X
X X
XX XX
XX
XX XX
XX XX
XX XX
BY LESS
BY MORE
XX XX
XX X
- XX - -
XX
(1
- - XX
XX
a
-XX ---
XX
XX XX
U- --
-  - X --  X -
XX XX XX
XX XX
XX XX -XX
XX
XX XX
--0 -
0 0
XX
X XX
XX
XX XX
XX XX
THAN 15%
THAN 15% &
8S%
TABlE 14. TABLE OF STATIONS WHERE ATEP OIIALITY CONCENTRATIONS EXC.EDS CRITERIA.
JAN FEB WAR APR MAY
It O X XX
XX XX Ii
XX XX XX X (1
XXX XX XX XX
3111 1
XX
XX
 XX
JUL
-X
XX
XX
XX -
AuG
X
XX
XX
XX
0
X X
- 0 0--
0 X
OCT
X
XX
XX
XX -
0
X
XX
XX
X
X
0
XX
XX
XX
XX
XX
-XX
-XX--
X
- - XX
-
X
0
X
0
(1
IJOV DEC 1JO
(I(1-.
0 LI
9
XX 11
XX 10
12
X 10
II
X X 10
XX XX 9
XX 9
o x 1 II
XX 10
XX 7
16
XX 11
15
XX 10
16
---XX-X---X -X -----X- -X- -
XX
XX XX XX XX XX
XXX X -  XX 
X X X X XX
XX XX XX XX
XX XXXXXXXXXX
XX-X XX
XX XX
XX XX XX
 XXXX -
XX XX
XX XX XX
-- XX XX - XX  -
70301 PISS SOb
 
PEAR P FIR CrIPINNE
COLORADO RIVER NEAR CISCO UTAH
COT ORADO RIVER AT HIGHWAY BRIDGE NRMOAB
COLORADO P ABOVE HILL CREEK NEAR NOAB lIT X
COlORADo R AT LETS FERRY, AZ. 0 0 X X X
VIRGIN R AT BbrrnMINr.Tor1; IIT - -Xx  -- -- -- XX -
VIRGIN P AT LITTLFFIEI .D. AZ XX XX XX
PARIA P. AT WHITE 14011SF RUINS NP GLEN CA XX XX XX
SAN JUAN RIVER AT SHIPROC NM 00
SAN JUAN RIVER NEAR BLUFF, UTAH X XX
MUDDY CR AT DELTA MINE NP HANKSVILLF, UT XX XX
MUDDY CREEK AT P 10 1 1TH MR HANKSVILLE, lIT; XX
GREEN RIVER NEAR GRFF.NDALE, (ITAH 0 0 0
GREEN RIVER NEAR JENSEN, UTAH 0
GREENRTVER AT-GREFNIVERUTAH 0X -X 
SAN RAFAEL P AT SAN R BR CAMPGROUND HR C
SAN RAFAEL RIVER NFAR GREEN RIVER, UTAH
FERRON CREEK REL PARADISE RANCH NRCLAWS
PRICE RIVER AT W000SIDE, UTAH
GRASSY TRAIL CREEK AT SUNNYSIDE. UTAH
WIllIE P NP WATSON UT - - - --  -
WHITE RIVER AT MOUTH NEAR OURAY UTAH
BITTER CR AT MOUTH HR BONANZA UT XX
X 0 0 XX XX
X X
-  - ----- -
0
X 0 0
- XX XX XX
XX XX XX
XX XX XX
- - ----- - - 0
XX XX
X
XX
0
XX
X
XX XX XX
X
XX -- -  --- - -
X
XX XX XX X XX XX
XX XX XX XX XX
XXXX-XX XX   --XXXX
XX XX XX X XX
XX XX XX X XX
0-- --X--- -- - -
X
HELLS HOLE CAN AT MOUTH NM WATSONUT 
DIICIIESNE RIVER FJFAR RANDLETT. UTAH XX X X X X
HENRYS FORK HR MANILA, UT XX X X X XX
DOLORES RIVER NEAR CISCO.UT, - - -- XX - XX  - 
JORDAN RIVER P 5900 SO MURRAY UTAH XX XX XX X XX XX
LEGENDI 0 EXCEEDS CHITERIA
- - - -- X EXCEEDS CRITERIA
XX EXCEEDS CI4ITERIA
X II L00
X 10 0 80
6 - - 0.67
6 0.67
Ii 11 1.00
9 -0.79
XX 11 0.91
9 1.00
12 0.42
10 0.60
6 1.00
5 1.00
11 0.27
1 0.09
X 10 0.70
XX 11 1.00
XX 10 1.00
XX 17 - 0.92
P 1.00
XX Ii 0.73
7 - fl43
X 1) 13 0.69
5 1.00
I  1.00
XX XX 11 1q00
II 0.91
XX XX IN 0.78
14 1.00
0
XX
X
BY MORE THAN
lESS ThAN 93%

-------
ni. 14. TARIF: OF STATIONS WHF.RE WATER QUALITY CONCENTRATIONS EXCF.F.DS CRITERIA.
00095 CNDIPCTVY
- - -- ------_- ------- ----- - -
RP AP RIVER AP1VE KESERVOIR NEAR WOODRuFF XX XX XX XX XX XX
PEAR R AT BORDER WY XX XX XX XX XX XX
- HF RRNRCORINN! - XX XXXX -XX -- XX XX - XX
COlORADO RIVER NEAR CISCO UTAH XX XX XX XX
COt,DRAD() RIVER AT HIC.HWAY BRIDGE NR HOAR XX XX XX XX XX XX XX
COlORADO B AROVE MTl 1 L CREEK NEAR MOARUT XX  XX XX XX XX XXXX
COlORADO P AT t,EES FERRY. AZ. XX XX XX XX XX XX
VJRC.IN P. AT RLOI1MINGTON,UT XX XX XX XX XX
VIRGIN R AT LITTLEFIELD. AZ  - --  XXXXXX XX XX XX 
PAPIA P. AT WHITE HOUSE RUINS HR GLEN CA XX XX XX XX XX XX
SAN JUAN RIVER AT 5HIPROCK , NM XX XX XX XX XX XX
SAN JIIAI1 RIVERNEAR BLUFF. UTAH --  -- xx-xx -xx - XX - - --
DIRTY DEVIL P AR POISON SR WA HR XX XX XX XX
HUF)I)Y CR AT DELTA NINE HR HANHSVILLE. lIT XX XX XX XX XX
WOODY CREEK ATNO(ITR HR RANKSVILLE UT  - XX - XX- XX XX
GREEN RIVER NEAR GREENDALE. UTAH XX XX XX XX XX XX
GREEN RIVER NEAR JENSEN, UTAH XX XX XX XX XX XX
GREEN RIVER AT GREEN RIVER. UTAH - -- XX XX XX XX
SAN RAFAEL K AT SAN P BR CAMPGROUND HR C XX XX XX XX
GAN RAFAFJ, RIVER NEAR GREEN RIVER, UTAH XX XX XX XX
FEPPONCREFX BEE. PARADISE RANCH NRCLAWS XXXX -XX XX XX-
HUNTINGTON CREEK NEAR HUNTINGTON, UTAH XX XX XX XX XX XX
COTTONWOOD CR,ARV STR.CANYUN.NR ORANGEVI XX
COTTON WOflD CREFK NFAROPANGEVILLET UTAWXXXX XXXX XX XX
PRICE RIVER AT W000SIDE, UTAH XX XX XX XX
GRASSY TRAIL CREEK AT SUNNYSIDE. UTAH XX XX XX XX XX XX
WHITE R HR WATSON lIT -   - -  -  XX - XX  XX XX  XX
WHiTE RIVER AT MOUTH NEAR OURAY UTAH XX XX XX XX XX XX
HITTER CR AT MOUTH NP BONANZA lIT XX XX XX XX XX
HEI,ljSHOLE CANATMOUTIINRWATSONUT XX - - -
DIICIIESNE RIVER KFAR RANDLETT, UTAH XX XX XX XX XX XX
STRAWBERRY RIVER NEAR DUCHESNE. XX XX XX XX XX XX XX
IIFT RYS FORK MR NAIITLII, UT - XXXX XX XX 1X 1X XX
MILL CR NP HOAR uTAH XX XX XX XX XX XX XX
DOLORES RIVI .R NLAP CISC(I,UT. XX XX XX XX XX XX
,JOROAN RIVER P 3800 SO MURRAY UTAH - - XX XXXX XXXX XX - XX
JORDAN RTVEP 0 3700 SOUTH P SALT LAKE CI XX XX XX XX XX XX XX
.JORI)AN RIVER P CUDAHY LANE HR SALT LAKE XX XX XX XX XX XX XX
SEVIER RTVER BELOW PIUTE DAMP1RMART3VAtTXX XX XX- XXXXXX
S .VIEK RIVER NEAR I.YNNDYL, UTAH XX XX XX XX XX
WEHFR RIV AT GATEWAY uTAH XX XX XX XX XX XX XX
MEDF.R RIVER HR PLAIN CITY uTAH - XX -XX - - XX - XX - - XX - - XX
JORDAN RIVER 0 5800 SO MuRRAY UTAH XX XX XX XX XX XX XX
LEGEND: 0 EXCE .DS CRITERIA BY
-- - X EXCEEDS CRITERIA BY
XX- EXCEEDS CRITERIA BY
AUG SEP OCT NOV DF.C HI)
flhI ,
XX XX XX 11
XX XX 11
XX XX XX XX 10
-XX XX -XX-- -- :4
EXCEEDENCE
PR OIiABX I,ITY
0.91
0  92
1  00
JAN FEB MAR
APR
MAY JUN
JORDAN
RIVER A 3700 snirrul P SALT LAKE CI- XX  -XXXX----X
-- ----- x-
XX
JORDAN
RIVER p CIIDAHY LANE
HR SALT LAKE
XX XX K
X
X K
XX
SFVIFR
RIVER NEAR lYNNOYL,.
UTAH
XX XX
XX
XX
XX
JOPDANRTVEP 8 5800 80 MURRAY
uTAh -- - XX-XXXX
X- XX - -XX--
XX
XX XX XX XX
XX XX XX XX
XX- XX- -- XX
XX XX
XX XX
-XX - - XX- XX
XX XX
XX XX
XX - XX -- - -
XX XX
XX XX XX
XX - XX
XX
XX -
XX
XX XX
XX XX
XX XX
XX XX
XX -- -
XX
XX
XX -- -
XX
XX XX
XX- -
XX XX
XX
XX
XX
XX
 --XX --
XX
XX
XX XX
XX XX
--XX -
XX XX
XX
-XX- XX
XX XX
XX XX
XX XX 
XX
XX XX
XX - -
XX XX
XX
XX
XX
XX
XX
XX
7X -
 XX
XX
XX
 -K
- --XX
XX
XX
-XX -
XX
XX
XX 1% 1.0()
XX 20 1.00
XX 16 1.00
XX 10 1.00
38 3,00
- XX 21 -1;00
XX 30 1.00
q 1,00
XX - 11 t -.00-
10 1.00
XX 32 1.00
XX 10 1,00
3 1.00
F l 1.00
3 1;00
XX 11 1.00
XX 1? 1.00
XX 10 - 3.00
XX 11 1.00
XX 10 1 O0
XX 12 - 1.00
XX 12 3.00
6 1.00
XX 12 - 1.00
XX 10 3.00
XX 12 1.00
7 t00
XX 13 1.00
6 1.00
1 I.A0
XX 11 3.00
10 1,00
- 12 -- 1.00
II 3.00
XX 19 1,00
XX 18 1,00
XX 31 1.00
15 1.00
XX ID - - 3.00
XX 10 1,00
XX 12 1.00
XX 13 3.00
XX 18 1.00
XX
XX
XX
XX
XX
- XX -
XX
XX
XX
XX
XX
LESS
MORE
MORE
XX XX XX
XX
 XX XX
XX
XX XX XX
XX - XX
XX XX
XX
-XX XX
XX XX
XX
- XX- XX -
XX XX
THAN 15%
THAN 15%& lESS THAN H %
THAN 85%

-------
TABLE 14. lADLE OF STATIONS WHERE WATER OUJALITY CONCF.NTRATIUNS EXCEEDS CRITFNIA.
JAN FEB MAR APH MAY JUN JIlL AUG S P rJ T NOV IWC

00070 TURN
Slit * 5 * 5* * *5 * * * St
BEAR R AT BORDER WT  - XX -  -- -
VIRGIN P AT Ht,00MINGTON.IJT XX XX XX
VIRGIN N AT LITTliEF Ei,D, AZ XX XX XX XX XX
PARIA R; AT WHITE HOUSE R1ltNS-NRGT,EN-CA XXXX - XX - XX  - ---- - - -
00530 RF.SII)IPE
_____________  -  -- - --- -- - -
COLORADO RIVER AT HIGHWAY BRIDGE HR MOAN XX XX XX XX
COLORADO P ABOVE MIlL CREEK NEAR MOAN UT XX XX XX XX
SAN JIJAN-RIVER A1 SHIPROCK;:EM  XX XXXX -XX-X - I) -- 0-- XX - XX
SAN RAFAEL RIVER NEAR GREEN-RIV1 R, UTAH XX XX X
PRTC RIVER AT WimOSIDE, UTAH XX XX XX
WHTTE RIVER AT MOUTH-NEAR OURAYtITAH - -  - - --  -X
NICHESPIE RIVER NEAR RANI)IIETT. UTAH X XX XX
IORDAPI RIVER 9 SBOO SO MURRAY UTAH X
JORDAN RTVFR9CI IOAHYLANE-NRSALT LAKE - -X -
JORDAN RIVER P 5800 SO MURRAY UTAH X
7029 RFS SIJSP - - -- _____ - - - - -
*i***S*****St*Sts
WHITE RIVER AT MDIJTII NEAR OURAY UTAH XX
80154 SUSP SEll
REAR RATRORDFR WY -  -- X - -
DEAR P MR CORINHE X XX X X XX XX XX
CCII.ORADO RIVER NEAR CISCO UTAH XX XX XX XX XX XX
COLORADO P AT LEES FERPY;AZ   X-X - -
VIRGIN P. AT BL .DOMIIIGTON,UT XX XX XX X XX X XX
VIRGIN P AT i,LTTLEFIEL.D, AZ XX XX XX 0 0 XX
PARIA R; AT WHTTE HOUSE RUINS -NP G1 ,EN -CA--- XX XX XX  XX XX  - XX - - -
SAN JUAII RIVER AT SHIPROCK, NM XX XX XX XX XX XX XX XX XX XX XX XX
SAN JUAN RIVER hEAP BluFF, UTAH XX XX XX XX XX XX XX
MUDDYCPATDELTAMINENRI IANKSVTIJLEr1JT XXXXXX - X
MUDDY CREEK AT IIOUTII HR HANKSVILLE, UT, XX XX XX XX XX
GREEPI RIVER NEAR JENSEN, UTAH XX XX XX XX
C,RF.EN RIVER AT GREF.N RIVER, -UTAH XXXXXX - XX XX XX - - X XX - X - - -
SAN RAFAEL P AT SAN P PR CAMPGROUND NP C XX XX XX X X
SAN RAFAEl, RIVER NEAR GREEN RIVER, UTAH XX XX XX X XX
FFRR IN CREEK RFT PARADISE RANCH NR CLAWS - - - 0 -X XX
HIJNTINC.TON CREEK NEAR HUNTINC,TON. uTAH X XX X X
COTTONWOOD CR FK hEAP DRANGEVILLE, UTAH XX XX
PRICE RIVER AT W000SIDE, UTAH -- XXXX XX XX - XX -- - -
WHITE P NP WATSON UT XX
WHITE RiVER AT MOUTH NEAR nURAY uTAH XX XX XX XX XX XX XX
HFIL,S HOLE CAM AT MOUTH NR WATSON UT - - XX --  - - - --
DIJCHESNE RIVER NEAR RANDLFTT, UTAH XX XX X
LEGENDI 0- EXCEEDS CRITERTA BY LESS THAN 15%
- -- - X EXCEEDS CRITERIA BY NflPE THAN 15% & I.r8S THAN
XX EXCEEDS CRITERIA NY MORE THAN 85%
P 1 1. EXCFVDF ICE.
OI lS PR(IIIAb LillY
1?
S
A
4
0 .25
0.60
0.83
I  00
8
30 0.50
I I - -0,82
30 fl 50
o.so
7 - 0,50
0.30
F l 0.32
15 - - 0.13
I i 0.12
3 0,33
12 -0,17-
9 0.89
11 0,8?
17 ( 1.24
7 1,00
6 1.00
A 1.00
19 1.00
17 0.97
4 -- 1;0O
1 3.00
4 1.00
13 0,9?
5 1,00
H 0 ,BR
S - 0.60
9 0.44
S 0,40
8 0.88
2 0.50
23 0.91
1 1.00
6 0,50
85%

-------
TAPI.E 14. TAI3L.F OF STA IONS WI RE WATFR QUALITY CONCf.NTRAT3OI S E.XCEEOS CR! 1FRT! .
0060R NH3+MH4
es*s i i i * 5* 5 5* 5 5*
XX
XX
X
()
n
-o
Ii 0.45
9 0.61
x ii 0.64
6 0.33
5 0,60
5 0.60
xx q 0 74
X 17 059
n 10 1.00
11 17 0.59
x ( I 10
8
10
11
9
XX Ii
In
12
10
6
5
11
0 10
XX 11
XX 9
Xx 12
8
Xx 17
7
13
5
XX 11
10
XX XX l B
X 17
X X II
15
10
X 17
0.50
0  36
(1  50
0.64
(1.76
0.62
1  00
0.17
0.50
1.00
1,00
0 0
0,40
I  00
1  00
0.92
1.00
0.67
0.14
A  08
1  00
0.91
1.00
O ,67
o.q4
0.73
0,41
0  70
0.94
Ill ( till.
I ll S
3
7
B
FXCFF D MCI
P ROB A B IL .! 11
1.00
0.43
0 .63
C.,,
JAN EFB MAR APR MAY .11tH JUt AUG P OCT NOV
OOLOPFS RIVFR PJIAR CISCO.lT.  XX X
JORDAN RIVER 9 1700 .5011TH 2 SALT I.AKF CI 0 X XX
SEVTFRPTVF-R PJFAP LYMIJOYL, UTAH X X XX X
00940 CHlORIDE
S * 5 5 555 * 5*5* 54 5 55
REAR RNR CORTNIJE -  ------- - XX XX XX XX
VIRGIN P. AT R1,OllPAINr,TON,tIT 0 x xx xx xx x
VIRGIN P AT L.ITTLEFIFI,fl, AZ X X X X X X
P*UOOY CRAT-0FT,TA--HIP1r-NP -IIANVSVTLTrUT X -  - - -
MUDDY CPFFK AT MOUTH NP HANKSVII LE. UT. xx X 0
BITTER CR AT MOUTH MR P0NANZA UT 0 0
DOLORFS RIVER NEAR CISCO.UT;- - XXXX- -  XX XX - XX - XX
JORDAN HIVFP 9 5800 50 MURRAY uTAH X 0 0 X X X
SEVIER RIVER IJFAR LYUUDYL., UTAH X XX X 0 0 ft X
JORDAN RIVER 6 5600 . 50 MURRAY 11TAfl X- - 0 0 - X - - X  x 
00945 SULFATE
s*s*S*s***.*sss**  --- - ---   -- - --
COLORAOII RIVF.R MFAR CISCO UTAH I) X
COIMPADO R!VFR AT HIGHWAY BRIDGE MR MOAB (1 XX
CflI,DRADfl H ABOVE MTLL CREEK NEAR HOAR 1 1T  0 --  X - - - - X - -- X
COLORADO P AT LEES FERRY. AZ. 0 0 0 0 0 0 0
VIRC,IN P. AT BL .OOMINGTON.UT XX X XX XX XX XX XX
VIPGIN P AT t.TTII .EFIEL .O, AZ -- -  - - XX - XX X -  XX XX XX XX - XX
PAPIA P. AT WHITE HOUSE RUINS MR GLEN CA XX XX XX XX XX XX XX XX XX XX
SAN JUAN RIVER AT SHIPROCK, NM 0 0
SAN .JUANRIVFR NEAR BLUFF; I!TAH X X -- - X
MUDDY CR AT DELTA MINE. HR HANICSVILLF, LIT XX XX XX X XX XX
M(IDDY CREEK AT MOUTH NP HANKSVII .LE, UT, XX XX XX XX XX
GREEN RIVF R NEAR GREENflAI 1 F ttTAH -- - -
GREEN RIVER AT GREEN RIVER, UTAH X 0 0
SAN RAFAEL. R AT SAN R HR CAMPGROUND NP C XX XX XX X XX XX XX XX XX
SAN RAFAEL RTVER NEFR C,REE.N RIVER, UTAH- XX- ---XX-- XX- XX - -- XX - -- xx ------ XX
FEPRON CRFFK BIt. PARADISE RANCH NP CLAWS XX XX XX XX XX XX XX XX XX
PRICE RIVER AT WOIJOSIDE, UTAH XX XX XX X XX XX
GRASSTTRATTICRPEX -AT SUNNYSIDE UTAH XXXXXX  - X- XX-- 0 XX
WHITE P NP WATSON UT X
WHITE RIVER AT MOUTH NEAR OURAY UTAH 0
BITTER CR AT MOUTH PIP BONANZA UT - - XXXX - XX--- -  -XX  -- - - XX-  -
DUCUESNE RIVER NEAR RANDIJETT. UTAH XX X X X X XX X XX XX
HENRYS FORK NP MANILA, UT XX X X X XX 0 XX XX XX
DOLORES RIVER HEAR CTSCO.IJT.  - - X -- XX -- - X XX XX
JORDAN RIVER 0 SROO 50 MURRAY UTAH X 0 0 0 X X X X X X
JORDAN RIVER 6 1100 SOUTH P SALT LAKE CI X 0 0 X X
JOPDAN RTVF.R B CUDAHY LANE NRSALT IJAKEX  O -- X - - X - -
SEVIFP RIVER NEAR LYNPIDYL, UTAH X XX X 0 0 0 X
JORDAN RIVER 8 5800 50 MURRAY UTAH X 0 0 0 X X X X X X
LEGEND! 0
LESS THAN R %
X
F.XCPLI)S
CHITERIA
BY
THAN
C
4

-------
TABLE i4, TABLE OF STATIONS WHLRE WATER QUALITY CONCENTRATIONS EXCEEDS CRITERIA.
JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV
0 SS
flO1 ORES RIVER NEARCISCO UT. XX
JORDAN RIVER P 1700 SOUTH P SALT LAKE CI X XX
01034 CHROMTUM - 
** S $ 5 * *5* * * 5* * *
SAN JUAN RIVER AT SHIPPOCK. NM X
01147 SELENIUM
FAPIA N. AT WMITF HrjI1SFRiJINS NR GLENCA O--  - - - -
71900 MERCURY
- -- -  -_- - - -
BEAR P NP COPINNE XX
COLOPADO P AT LEES FERRY, AZ, xx
VIRGIN R AT-BLOOMINr,TON;UT- - - - -_-XX------- - -
VIRGIN P AT LITTLEFIELD, AZ XX
PARIA P. AT WHITE HOUSE RUINS NR GLEN CA XX
SAN JUANRIVEP NEAR RLUFFTUTAt4 -- O - - --- -- - - -  - -
PRICE RIVER AT WfltJD IDE, UTAH XX
WHITE RIVER AT PIOUTH NEAR OURAY UTAH XX XX
D 0L DRES-RTVERPIEARCISCO;UT.   -- -  ------- xx  - --  - 
JORDAN RIVER P 1700 SO(ITH P SALT LAKE CI XX XX XX XX
SEVIER RIVER NEAR lYPINDYL, UTAH XX
WERFR RIVER MR PLAIN CITYIITAW --XX-- - - -
01042 COPPER
  -- --_---- --. ----- - -_ --  - --  --. -- -- -
SAtE JUAN RIVER AT SHIPROCK, NM XX XX
WHITE RIVER AT MOUTH HEAR OUPAY UTAH 0
WEBER RIVER-NP -PLAINCTTYtJTAK - - XX------- 
01092 ZINC
   --_ -  - ----- - ---- --- - -  - - -  - - - -  -- - -- -- -   --- -  -
SAN JUAN RIVER AT SHTPROCK. NM XX X
WFBER RIVER HR PlAIN CITY UTAH X
PROCESSING COMPLETE FUR REQUESTED PERIOD
DEC Nfl, EXCF DENCF
(iNS PROBABILITY
XX 2 - 1.00
XX 4 1.00
4 0,25
1 1,00
5 0,20
3 0.33
2 0.50
2 0.50
2 0.50
4 - - fl 25
1,00
4 0.50
3 - - 0,33
5 0,80
3 0.33
S  --0,20
4 0.50
4 0.25
S - -0.20
4 0,50
5 0.20

-------
Table 15.
Water Quality Trend Table
U TA 11
Stations and Parameters where Significant Statistical Differences were Observed. -
Legend: I Improving Trend; 0 Degrading Trend; * = Parameter concentrations are at high levels.
Station
a
I..
a
.V


c
V
01
0
t

Z
V I


0
.C
0.
U I

0.
a
.
0
v,
.

>
0
fl
n

A I
.
0
v,
0
a a
VI V
 -
V I..
0. Q  0

U) IJ

u
-
IJ
V I
UI
V

o

VI
a
X
Bear R abv Reservoir or Woodruff
D *
Bear R at Border, WY
D
I
BearRatCorinne
D
-______
a a
Zb .Zi
Colorado R or Cisco
I
I *
a
I I Pb
-Cd - -
Colorado L or Moab
Colorado R at Lees Party, AZ
0 *
D
a
I
Virgin R at Bloonington
-
a
D *
I
- --
D 0
Paria a or Glen Canyon Reservoir
San Juan R or Bluff
-
-
a
Pb
-Cd-
Muddy Cr or lianksville
*
*
*
Green a or Greendale
a I
- 
*
-
-

0
Pb
-- -
Green R at Green River
a

D
Pb
antington Cr or B.antington
I
Pb
Cottonwood Cr or Orangeville
a
Price R at Woodside
a
Pb
- Grassy Trail Cr at Suonyside
White R or Ouray
0

D
Bitter Cr or Bonanza
 
 
I
Jordan R at 1700 S, SLC
,
1
Zn
Jordan R at Cudahy Lane, &.C
*
I
Sevier R or Mar7sva.Le
I
Sevier ft or Lyondyl
 
Iii__
*
D
107

-------
i V  ( , ? J(.
Table 16. Ranking of Critical Water Quality Stations by Pollutant Group
No. Avg.
Exceed. l bs. Coric .
Fecal Coliform Prob. Excd mg/i
1. Bitter Cr nr Kanda 1.00 9 100000+
2. Killpecker Cr at Rock
Springs 0.88 6 100000+
3. Goose Cr b lw Sheridan 1.00 i i 62636
4. Hams Fork nr Diamondville 0.67 7 4375
5. Bighorn at Lucerne 0.33 3 3824
Phosphorus
1. K llipecker Cr at Rock
Springs 1.00 7 2.82
2. Bitter Cr nr Kanda 0.89 7 2.71
3. Salt Wells Cr nr Salt
Wells 1.00 3 1.36
4. Goose Cr blw Sheridan 0.91 10 0.42
5. Whistle Cr nr Garland 1.00 2 1.29
6. Shoshone R nr Lovell 0.89 7 0.30
7. B Itter Cr nr Salt Wells 1.00 2 0.54
Dissolved Solids
1. Salt Cr nr Sussex 1.00 11 4274
2. Beaver Cr nr Newcastle 1.00 11 3430
3. Bitter Cr nr Salt Wells 1.00 10 3671
4. Big Sandy R nr Eden 1.00 12 2721
5. Cheyenne R nr R lverview 1.00 10 3240
6. Casper Cr at Casper 1.00 10 3040
7. Little Powder R nr Weston 1.00 11 2743
8. Belle Fourche R nr Piney 1.00 11 2728
9. Powder R - Sussex to
Arvada 1.00 12 1954
10. Blacks Fork nr Lyman 1.00 10 1992
Suspended Sediments
1. Salt Wells Cr nr Salt
Wells 1.00 6 11070
2. Blacks Fork nr Lyman 0.93 10 1094
3. Powder R at Sussex 1.00 10 1547
108

-------
V 
Table 16 (Continued).
Ranking of Critical Water Quality Stations
by Pollutant Group
Suspended
Sediments
Medicine Bow R nr Hanna
Exceed.
Prob.
1.00
No.
Mos.
Excd
12
Avg.
Conc.
mg/i
425
4.
5.
Belle Fourche R biw Moorcroft
1.00
11
408
6.
Little Powder R nr Weston
1.00
10
421
7.
Salt Cr nr Sussex
1.00
11
861
8.
Nowood Cr nr Tensleep
0.92
9
352
9.
Bitter Cr nr Bitter Cr
0.94
10
1194
10.
Shoshone R nr Lovell
1.00
9
214
109

-------
TARi,F 17 TAhil,E liE  cIATIOMS WHERE WATFR QUALITY CONCEMTPATIOt1  FXCEFI)S CHITFPIA.
TAM FFH MAP A N NAY JUN .10 1 . AIG
Sl OCT plOy
I)FC lfl, EYCVF 19 11cr
oi c PRh IflAflhI Pry
5s* st s sss s s
NORTH P lATTE RTVFR ev, CASPFR no
V POIIOFR RTVFR AR flHY C lip WFSTON. WY
cv.rAn C PT, ROCK r HR H II V WA I 0 WV
CRAZY WOMAN CRFEK SIT IJPPFR STA. NEAR APV
cAT,r CPEFK NFAP ctic rx. Wyn.
SOUTH FORK P W ER P. NP. KAYCIF. WYO.
7 ( l i4
12
I 1 .1 , 10
in n.ll)
in n i
it
4 (  l7
xx xi ix ii - - i,no
xx 3 9 f,.vI
- I ?
- - xx xx I ? flA7
19
xx xx ii l fl
- xk -- n (.5TH
7 7 ( .14
1?
11 n,n
x x xx P
i i xx x Q
xx
CRI HIA BY VFSS
CRTTWRTA fly i RE
rNT5FWIA i V ilPE
- 0 ( .1 1
I , -  n j
nc 5
37 -
I I 
I i n q
1 fl)t)
1 9 (I,AH
3 9 n n
ii (.77
(  . 0 k
xx n x I  ii
x A fl .A7
O ( 3 ( () I)fl
,*s*sss*ss*ss$ us
I, PflW )Fft P 1 W rnPRSIJ, C NP WESTON WY
7, DSSWIWR HIVFR AR PRY C PIP WrsTon. WY
HAMS FflPK E$P CPAHGFR. WYIT.
vic,iPECKFR CPF K At POCK SPRTNCS WYO
H PTIU1 i,AttE RjV rAI1O i PtP4NNh P ff E - 
NORTH PI,ATTF pyyrp RFI.flW dEMOn PESFPVflI
i$6Th FEC OLI
5 * 5* 5 * 5 *5* 5* 5*5 5 *
SOUTH FORK P OWOFP P . MR. KAYCFF. WYO.
r,00sF CPtFK n,:,,ow SHFWIOAN WYO xx xx xx xx
RI(,HORN RIVER T i,iICFR IF. WY O.
C.RFFN RIVFP rv.ow r,RFVT R IVFP WYS1
HAMS FOP( NEAR OTAMONDVIT,l,F W xx xx xx
MTTHS FORK MFSIR I,VMAN. WY
RITT R CR PET T.TTTVE BITTER CR NP KANOSI xx xx xx xx
KIT,T,PECKFR CPFFK At PO(K SPRIN CS WYO xx xx xx
MIRTH Pl ATTE RTVFR ST CASPFR no xx xx
T.APAUTF RIVER AT HOWE !, !,  WY x
31501 tot roy.j
xx o xx
0
x
xx
x
x xx
I
xx
xx xx xx xx
x xx
TX
xx xx xx
x xx
I -a
 -a
0
- xx xx
x x xx 21 ( 8
xx
0 06fl0 TOTA l. U
*5 * 5* * 5 5 * * 5 5 5* 5 5 5
CI IFVFiIP. RTVFR NP PIT/ERVIEW WY
PITTER CP PET. lItTlE RITTEP CR NP KANDA x
K !! I.PFrKFR CPFFK At POCK SPRTNCS WYO
( ( SFS 19505-TOT
s****ss***s*s*st*
CHFyFHPl RTVFP NP 015 !. !. CFNTFP WY
CHFYFNME RTVFR HP PIVFPVTEW W xx
RFAVFH CRFFK NFAR iFWCASTLF. no. xx n x xx
n .u ,r nui ritr RIVER n .v.ow MonRCROrT. WYO xx n x x xx xx
PET,L.F FOIIRCHF RIVER AT OFVTIJS TOWER WYO xx - - - - - - -
POWDFR RTVER NFAP VAYCFE. Wyn x x xx x xx
POWI)FR RTVFR At SUS5F . WY O. x xx xx xx xx xx x xx x
POWDER P At ARVAPA WV I) x xx xx - xx x xx xx x x
I, POflIFP P flE COPRI I II C NP I4EcTON wv x x x
I, p pWr rp H NP WESTON WV x x
(15
(44
( .1 )
x
x x
xx
x
LIF(;FNr : 0
xx 
x x
xx
xx
rxCu FOS
F x C F F I I S
cx r . I c t) 
THA I 
 II A ll
III A  I
Is,
15 I.E,S! T4API P%
a,,

-------
TARIF 17. TARYF 1W STATTU S WUEPE WATFR ( II4T ITY CC 1CE TPAT1nUc FXCFFI)c CPTIVRTA.
XX XX XX XX
XX   XX  XX
XX XX
XX
- - -
XX X V XX XX
XX i i
X XX X X 17
XX XX 1 7
X - - 17
24
XX X ii
X I ) Ii
i_I 11
n XV XX XX XX XX l 
V - XX XX XX - YX XX X - 12
n 1
I,
() -  I
,IA F 13 MAP APP MAY JN .flJt. AG SEP 0(T
TlvI(;!I PTVFP AT )Z ))PIApCIt WY)) V
r,nrisw CWFI.K RET(  SIWPTDAN WYn - XX XX I)  XX - XX - XX
RI (HflR  P AT WART AMP WYIl XV XX X X
TCHflR P AT KANF wyo V XX X X XX
SIIfl1) F RTVFR NFL .flW P .ATfl BTI,t. RESERV 0
SuflSJIUPI PTVFP Afl DRY C COPY. WV
SRAS Il)MF RTVFP NFAD T (1FTL wYn V XX XX I) XX X XX
SA(F C AT Sjr )OM ( A M A!, P DFAVFR Wyn XX XX X
% .HTSTI,F CPF I( NEAR GAPT,AWD WVO XX XX V XX XX
1TTFR CPF K NFAP C.AflI,APIfl WYA XX XX XX XX XX XX n
NFl ,!. C MR GTWYBILt,  WY ! ) XX V X
GPFVNtT. RtIFD PFAR RASTN. WYP. X YX
PIflWflflD P NP TE ST,EFP. WY ______ XX XX
PATNTRACK (RFI.K PEAR 141) 1 1TH RFL1)W HYATTVI  -
UflWOAI) P AT P4ANI)FRSfl I. WYO XX XX XV
W )fl RTVFR NFAP PIJROTS. WYP. V
4iI l) P AT PIVFPTAN. WY x
WJNfl PTVFP AR RDYSFN R! MR SHPSHPNI WY X XX X XX
FTVFHII,F CRFFK EAR stI(ISI IONT  WVO. XX XX X
t,ITTT ,E WTNP P P1K RTV !RTON Wyn X XX x x
PFAVFR CPFFP( NP ARAPAF4AE WYP) XX XX
lITTlE WIND P APOV ARAPAHAE. Wyfl. X
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V. POWDER P NP WESTON WY XX XX XX XX TX XX XX XX YX XX XX
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-------
t nir it TRT v rw cIATTUNS WWER wnER l Av ,zTY C0,ICEHTRATIP IJS EXCPYF)S CRTTFWTA.
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-   - - - - - - -   - 
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AjT Wvy ,c r MR S RAXTFR wy U 4
RITTCR (PEEK NEAR PITTER CRrEK. W 0 I
ENrAMpM&tI*r (flY AP ii uf: APK ( P PR ENCAMPU XX 1
01051 TFA0
P04DER RIVER At S uS SEX , WYO. TX 7
CRA7V WUMAN CREEK Al tIPPER STA. PTEAR ARV TX
01092 fl C
5* $$$*$* * 5*
pflwflwp RIVER AT SIJSSEX  W y0 . xx 9
01077 CAPMTIIPI
* * 5* 3* * * S * 5*3 * * * S
POWDER RIVER At SUSSEX. WYO. TX 7
CRAZV l4I A CREEK AT UPPER STA  NEAR APV TX 4
PPPCESSTIIC COMPTJETE FOR RItOLIESTEP PERIOD
. T( i n t(E
PPi1 A I! ITT
O 50
0,13
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0  7 5
0,9 5
I ,Oo
o
095
o, cn
O .co
0.25

-------
Table 18. Water Quality Trends
Stations and where Significant Stat stica1 Differences were Observed.
Legend: I = In roving Trend; = Degrading Trend; * Parameter concentrations are at hign leves.
Station
5


U

C



a
3
I.-

.

2
i..,

0
L.1
.

>

0
.
n I
i
0
V)
.


c 
U C

i

5

.
I-

a



U
C

Beaver Cr nr Newcastle
D
0
Belle Fourche R nr Piney
I
0
D
D
Little Powder R nr Weston
I
0
I 
D*
0
Clear Cr at Ucross
I
I *
Clear Cr nr Arvada
0 w
D
0*
D
Piney Cr at Ucross
D
0
0
0
Crazy Woman Cr nr Arvada
Crazy Woman Cr nr Arvada
DPb*
Salt Cr nr Sussex
0
S Fork Powder R nr Kaycee
D
Tongue R nr Dayton
I
Shoshone R nr Lovell
0*
Whistle Cr nr Garland
0
Paint Rock Cr nr Mouth
0
Nowood R at Manderson
D .
0*
Beaver Cr nr Arapahoe
0*
Hams Fork nr Diamondville
D
I

Muddy Cr nr Hampton
0
0 *
D
0*
bHg
Bitter Cr nr Kanda
1*
1
Kilipecker Cr at Rock Springs
D*
I .
D
1*
I
Bitter Cr nr Bitter Creek

N Platte R nr Sinclair
0 D
I

D
LI
I
0* 1
Iti
I
II
PCU
E
20

-------
Table 18 -(-eontinued). Water Quality Trends
Wyo :iNG
Stations and Parameters where .Signff- icant Statistical Differences were Observed.
Legend: I In roving Trend; D Degrading Trend; * = Parameter concentrations are at high levels.
Station
a





C
,
g)
I_

Z
,

L_
o
. .
I
2

.
0
v,
.
4
>
.

. !
Q
.
;
0
v,
0

v

a.

(-,
a

0


V



(fl
)

0


.
- u

(
m




-


Z
N Platte R at Alcova
I
N Platte R nr Glenrock
I
Laramle R nr Ft Laranile
I
I
Little Laramie at Two Rivers
D
Sweetwater R nr Alcova
I
Litte Medicine Bow R nr
Medicine Bow
D s
D*
D
Salt R nr Etna
D*
Cache Cr nr Jackson
I
Cheyenee R Nr Dull Center
I
I
Belle Fourche R Abv Dry Creek
0
Powder R Nr Kaycee
D
Powder R at Arvada
0
Bighorn R at Kane
D .
Shoshone R Nr Cody
D
0
Little Wind R Nr Riverton
I v
Green R Nr LaBar e
.
D
Green R Nr Green River
D
!alt Wells Cr
I
N Platte R at Mills
I
NPlatteRatCasper
tl Platte R blw Casper
I
I I

-------
122

-------
APPENDIX
State Water Quality Standards or Other
Criteria Used in the Stream Quality Analysis
123

-------
124

-------
EPA WATER QUALITY CRITERIA
Legend of Symbols Used in the Following Table
* Guideline only
(1) Green Book
(2) Blue Book
(3) Red Book
(4) Primary Drinking Water Regulation
(5) Secondary Drinking Water Regulation
(6) March 15, 1979, Federal Register
(7) July 25, 1979, Federal Register
(8) October 1, 1979, Federal Register
(9) Willingham, W.T.  EPA
125

-------
EPA Water Quality Criteria
TenET CCDO
PAPJYETER
AQUATIC LIrE
DRIMEIPG AIt0
PRIU .AR( COIfTI%CT OECTEiTICA
(o,pnr tUrt
00010 Cog Coot
Varitol.  (1)
O C eta, cold eater
0 C tan. arm eater
U
00010
(urb idlty
JTU
i ia&l .  (1)
0-SO
MA
NA
Ccnduct lvlty
00095 flo,/01
U
NA
U
Otseolved
00300 0o) gra
3.0 (3) mm.
U
A
00400 i 
su
6.5  9.0 (3)
5 0  9.0 (3)
6.5  8.3  (2)
Oil & Grtits
00550 Tot - S*It
n o/t
0.01 a 96 1w ICSO (3)
0.01 (3)
Fri. fr (1)
Fr .. fr (1)
Untonlz.d
00419 Mecola
0. (3)
U
MA
Iota) Aimannia
00610 mg/I

NA
05  (2)
U
Totil Nitrate
00620 mg/I
NA
10 (4)
U
00615
Total Nitrats
mg/I.
0.05  0.5  (9)
1 0  (2)
NA
00630
Total Nitrit.
4 NitrIte
U
10.0 (4)
NA
00640
- ---
Total Solubls
Inorganic N
- n3 1 I
T ariabls
0.1 1.0  (9)
MA
Y riabl.
0.110 * (9)
00665
Iotal PbospAv .t
mg/I
Vartab ).
0.01  0.1  (1.2.3)
MA
Variable
0 01 - 0.1  (1.2.3)
00720
Total Cyanids
mg/).
0.005 (3)
0.2  (2.7)
NA
00940
ChIorid.
.g/l..
NA
250 (5)
NA
00945
Sail fats
mg/ I.
NA
250 (5)
NA
00951
founds
rg/L
1 1*
1.4  2,4 (4)
depends on ang. air t p.
NA
01002

Total rico ..
Ansonic
 p 0/ I.
Total recoy.
S i - 24 1s  avg. (6)
  - 
0.05 (4)
NA
01001
Borian
LA
1000
IA
01012

p9/ 
Total rico,.
8er 1llon
am /I
-
(1.24 In 43R0)4.38) (6)
0.087 - 0.00087 (3)
NA
01022
eta ricov.
Boron
U
NA
p I A
01021
p0/I
Total rico,
Ca iiam
pgLL
Trivalent
(1 31 ln (IiAR0)-3 92).aa
10
MA
01033
Cbronia
 -----
Total recov.
(0.93 lit (KARD)+3.72) i
U
U
01034
Chrcamiia
100 (3)
50 (3)
U
01042
1 9/I
Total reco,,
Copper
Tot3l rico,
,(0.66 In (HARD).l.03) mae (7)
1000 (5)
1 P M
01045
Iron
1000
MA
MA
01046
p o /l-
Dissolved Ire ,.
pg/I.
NA
300 (5)
NA
01051
Total race,.
Lead
p 0 /I
Total rican.
,(1.51 In (ltAAD)1.39 as (6)
. -
50 (1)
NA
01053
Mangan...
U
30 (5)
U
01067
p c /I
Total rico,
Nick.)
, fl
Total r,cov.
(0.41 In (KA30).4.19) rams (1)
NA
IA
01077
5tl ,r
1,9 man (6)
50 (4)
NA
total Inorganic
M.rcury
3.2 ona (8)
0 2 (7)
P 1*
l thyl Mercury
pg/I
88 nan
NA
NA
01092
Total recee
Zinc
pc /L . . ._
Total rocoy.
,(0 64 In (11*90)42 46) max (1)
3000 (5)
5*
01147
S.l.nion
22 man (6)
10 (4)
MA
31614
Fecal cifo n . t
ppn
4L 1 0 0mL___
Total Phenoli
p 0/ I
NA
IA
200 30-day gee. melt
400 7day g .e. alan (31
32130
1 (3)
1 (3)
NA
Total resIdual C coldsater
50060 ChlorIne 10 .amram.ateq (3) U
_______ - .p g/I _ ..  - - .- _ -- - -- -- 
Olosoined Petidu.
10300 9160C U 500 ________________ 126
CC533 Sulpended
70299 SolIds 30
_E0154 - - og/) - -

-------
10306
00530
70299
-00114 -
TORET 0010
PVJIE1TN
SECOIICIRY CONTACT RTCREATT06
LIVISTOCK hAT(RU.G
l tA lr.ATIOaI
00010
Tnnpera turn
OegCent
U
U

U
00070
Turbidity
JTU
U

U
NA
Variable  (2)
00095
Conductivity
jnd ios/
NA
NA
iWO to p3000
00306
Disiolvid
0 ee
riIL
i*
NA
NA
00400
p 13
-50
U
U
4.5-9.0  (2)
00550
011$ trees.
Tot - Salt
Free ?r (1)
Fr (1)
Pie, fr (1)
00619
Unionized
M,o,ii .
U
U
(6
00610
Total A,uiwiie
/L
NA
NA
NA
00620
Total Nitrat
egJL
NA
U
1 (11
00615
Total Nitrat.
mg/L
NA
10.0  (2)
MA
00630
Total Nitrite
 Nitrite
- N f l
NA
100 0  (2)
NA
00640
Total Soluble
Inorganic N
 It
NA
NA
NA
00665
Total Phosphru,
eq/L
NA
U
NA
00720
Total Cyanide
eg/L
U

NA
NA
YariIble  (2)
00940
Chloride
.9 1 1.
U
(A
ltoZ OoeqJt
00945
Sulfat.
m /L
U
NA
NA
00951
founds
e9IL
NA
NA
Variable  (2)
a_n __it_p
01002
p 9 / I
Total reco,.
NA
NA
200  (2)
NA
100 (3)
NA
01007
Barhn
01012
pia .
Total reco .
B,rylliua
i oLI
U
NA
Variable (3)
50 - 100
01022
recov.
Boron
( IA
1900  2 )
Z50 (3)
01021
Total rscOV.
Ca i
U
50  (2)
Variable
10 50  (2)
01033
Trio. lent
Clir iiu
NA
NA
U
01034
Total e.
Claroulu.
NA
Variab ls
100  1000  (2)
01042
Total recov
Copper
NA
600  (2)
Variable
200 - 6000  (2)
01045
pgLt
Tnt l rota..
Iron
NA
(A
Variabi.
4t A I O  20( YI  (21
01046
, aqIL
Dissolved Ira.,
p I lL
U
NA
NA
Variable
01051
Total rico..
Lead
 p g / I
Total reco,.
U
NA
100  (2)
NA
5006  10900  (2)
Variable 
01055
Mangaoun.
ji
Total rico ,.
NA

NA
,fai  sIuo  (7)
Variable
209 - 2000  (2)
01067
NIck.l
1 IP
Total rico,.
U
NA
NA
01077
SlIcer
p ol l
Total inorganic
Mercury
p g ! 1
NA
10  (2)
U
Methyl Mercury
pglL
NA
NA
NA
Varlabl,
01092
Total rico,
ZInc
U
25000  (2)
2009 - i0 0 0 0  (2)
01141
p 3 1 1
Total rico..
Selenlu.
31*
SO  (2)
20  (2)
31614
32720
F ecal {
eon

Total Phenoit
polL
-
 1000 30lay geo roan
2000 7-day gee roan (2)
U
1006 aa (2)
NA
tA
NA
10060
Total residual
Chlorine
NA
U
 
NA
0i o 9 Ived Peildue
9100 C
- tu spend ..d
Solids
.o,/I
Variable a
10000  (21
Variable tO
Ic000  (2)
127

-------
COLORADO
Water Quality Standards
Stream Segment Classifications
EPA Region 8
Segment
Classification Description Code
Al Contact recreation, cold water
fishery 15
A2 Contact recreation, warm water
fishery 16
B]. No contact recreation, cold water
fishery 17
B2 No contact recreation, warm water
fishery 18
128

-------
COLORADO
Water Quality Standards Or Criteria Used In The Stream Quality Analysis
PARAMETER
STORET
CODE
Class,
fication
Al
A2
Bi B2
1. 0.0. 00300 6 5 6 5
2. Fecal Colif. 31616 200 200 1000 1000
3. Fecal Colif. 31615 200 200 1000 1000
4. Fecal Colif. 31625 200 200 1000 1000
5. Total Colif. 31501 2000 2000 10000 10000
6. Total Colif. 31505 2000 2000 10000 10000
7. Total Nitrite-N 00615 .5 .5 .5 .5
8. Total Nitrogen 00600 10 10 10 10
9. Total Nitrate-N 00620 10 10 10 10
10. Total Nitrate-N 00630 10 10 10 10
11. Total N03 - N03 71850 j 10 10 10 10
12. Total P0k  P 00665 .1 .1 .1 .1
13. Total P0k  PCt 00650 . .1 .1 .1 .1
14. Total P0k  P 70505 .1 .1 .1 .1
15. lOS 00515 500 500 500 500
16. TDS 70300 500 500 500 500
17. TDS 70301 500 500 500 500
18. TDS 70295 500 500 500 500
19. Conductivity 00095 833 833 833 833
20. Turbidity 00070 25 25 25 25
21. Susp. Solids 00530 90 90 90 90
22. Susp. Solids 70299 90 90 90 90
23. Susp. Solids O154 90 90 90 90
24. Chloride 00940 250 250 250 250
25. Sulfate 00945 250 250 250 250
26. Unionized NH 3 00619 .02 .02 .02 .02
27. NH3 - NHk -N 00C08 .02 .02 .02 .02
28. NH3 - NHk -N 00610 .02 .02 .02 .02
29. Cyanide 00720 .005 .005 .005 .005
30. Arsenic 1002 130 130 130 130
31. Total Chromium 1034 100 100 100 100
32. Total Selenium 1147 22 22 22 22
33. Mercury 71900 3.2 3.2 3.2 3.2
]j Observed concentration multiplied by 0.226.
2/ Observed concentration multiplied by 0.326.
129

-------
MONTANA
Water Quality Standards
Stream Segment Classifications
Description
Domestic use, access restricted
Domestic use after treatment by simple
disinfection, normal access
Domestic use after treatment, salmonid
fish propagation
Domestic use after treatment, marginal
salmonid fish propagation
Domestic use after treatment, nonsalmo-
nid fish propagation
Contact recreation, salmonid fish
propagation
Contact recreation, marginal salmonid fish
propagation
Contact recreation, nonsalmonid fish
propagation
Agriculture and Industry
Classification
A A closed
A-i A open Di
B-i B-D1
B-2
B-3
C-i
C-2
C-3

B-D2
B -03
C-Di
C-D2
E- F
EPA Region 8
Segment
Code
26
27
28
29
30
31
32
33
34
130

-------
MONTANA
Water Quality Standards Or Criteria Used In The Stream Quality Analysis
PARAMETER
-
STORET
CODE
n A . t
Segnent
Classifica
tlon .11
A
Ai
Bi
B2
B-3
Ci
C2
C-3
E
1. 0.0. uv.jvu 7 7 6 5 1 b 6 3
2. Fecal Collf. 31616 50 50 200 200 200 200 200 200 200
3. Fecal Colif. 31615 50 50 200 200 200 200 200 200 200
4. Fecal Colif. 31625 50 50 200 200 200 200 200 200 200
5. Total ColIf. 31501 50 50 2000 2000 2000 2000 2000 2000 2000
6. Total ColIf. 31505 50 50 2000 2000 2000 2000 2000 2000 2000
7. Total NitriteN 00615 1 1 .05 .05 .5 .5 .5 .5 1
8. Total Nitrogen 00600 10 10 1 1 1 1 1 1 1
9. Total NitrateN 00620 10 10 1 1 1 1 1 1 1
10. Total Nitrite Nitrate 00630 10 10 1 1 1 1 1 1 1
11. Total N0 - N03 7l85O2  10 10 1 1 1 1 1 1 1
12. Total P0. - P 00665 .1 .1 .1 .1 .1 .1 .1 .1 .1
13. Total P0.  P0 . 00650k .1 .1 .1 .1 .1 .1 .1 .1 .1
14. Total P0 - P 70505 .1 .1 .1 .1 .1 .1 .1 .1 .1
15. TDS 00515 500 500 500 500 500 500 500 500 500
16. IDS 70300 500 500 500 500 500 500 500 500 500
17. lOS 70301 500 500 500 500 500 500 500 500 500
18. TDS 70295 500 500 500 500 500 500 500 500 500
19. ConductivIty 00095 833 833 833 833 8.33 833 833 833 833
20. Turbidity 00070 25 25 25 25 25 25 25 25 25
21. Susp. Solids 00530 90 90 30 90 90 30 90 90 150
22. Susp. Solids 70299 90 90 30 90 90 30 90 90 150
23. Susp. Solids 0i54 90 90 30 90 90 30 90 90 150
24. Chloride 00940 250 250 250 250 250 250 250 250 250
25. Sulfate 00945 250 250 250 250 250 250 250 250 250
26. Unionized NH3 00619 .02 .02 .02 .02 .02 .02 .02 .02 .02
27. NH3 + NH. -N 00608 .02 .02 .02 .02 .02 .02 .02 .02 .02
28. NH3 + NH. -N 00610 .02 .02 .02 .02 .02 .02 .02 .02 .02
29. Cyanide 00720 .2 .2 .005 .005 .005 .005 .005 .005 .2
30. Arsenic 1002 .05 .05 130 130 130 130 130 130 130
31. Total Chromium 1034 50 50 100 100 100 100 100 100 100
32. Total Selenium 1147 10 10 22 22 22 22 22 22 20
33. Mercury 71900 .2 .2 3.2 3.2 3.2 3.2 3.2 3.2 3.2
/ Refer to the next sheet for descriptions of classifications
V Observed concentration multiplied by 0.226.
/ Observed concentration multiplied by 0.326.
131

-------
NORTH DAKOTA
Water Quality Standards
Stream Segment Classifications
EPA Region 8
Segment
Classification Description Code
I Resident fish specie propagation;
contact recreation; domestic use after
simple treatment; irrigation, stock
watering, and wildlife use. 39
IA Similar to Class I except softening
may be required for domestic use. 40
II Similar to class I except additional
treatment may be required for domestic
use. 41
III Industrial and agricultural uses. 42
132

-------
NORTH DAKOTA
Water Quality Standards Or Criteria Used In The Stream Quality Analysis
jj Observed concentration multiplied by 0.226.
V Observed concentration multiplied by 0.326.
PARAMETER
STORET
CODE
Classificati
on
I
IA
II III
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.
31.
32.
33.
D.O.
Fecal Colif.
Fecal Colif.
Fecal Colif.
Total Colif.
Total Colif.
Total Nitrite-N
Total Nitrogen
Total Nitrate N
Total Nitrate N
Total NO 3 - NO 3
Total P0k  P
Total P0k  P0k
Total P0k  P
TDS
TDS
TDS
TDS
Conductivity
Turbidity
Susp. Solids
Susp. Solids
Susp. Solids
Chloride
Sul fate
Unionized NH3
NH3 + NOk -N
NH3 + NO+ -N
Cyanide
Arsenic
Thtal Chromium
Total Selenium
Mercury
uujuu
31616
31615
31625
31501
31505
00615
00600
00620
00630
71850 .
00665
00650 ?
70505
00515
70300
70301
70295
00095
00070
00530
70299
$0154
00940
00945
00619
00608
00610
00720
1002
1034
1147
71900
5
5
5
5
200
200
200
200
200
200
200
200
200
200
200
200
2000
2000
2000
2000
2000
2000
2000
2000
.5
.5
.5
.5
1
1
1.5
1.5
1
1
1.5
1.5
1
1
1.5
1.5
1
1
1.5
1.5
.1
.1
.2
.2
.1
.1
.2
.2
.1
.1
.2
.2
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500
833
833
833
833
25
25
25
25
90
90
90
90
90
90
90
90
90
90
90
90
100
175
250
250
250
450
450
750
.02
.02
.02
.1
.02
.02
.02
.1
.02
.02
.02
.1
.005
.005
.005
.1
50
50
50
100
50
50
50
50
10
2
10
2
1O
2
10
2
133

-------
SOUTH DAKOTA
Water Quality Standards
Stream segment classifications are made up of Uses #9 and 10
and combinations of uses listed below:
Use
Group Description
1. Domestic water supply waters.
2. Cold water permanent fish life propagation waters.
3. Cold water marginal fish life propagation waters.
4. Warm water permanent fish life propagation waters.
5. Warm water semipermanent fish life propagation
waters.
6. Warm water marginal fish life propagation waters.
7. Immersion recreation waters.
8. Limited contact recreation waters.
9. Wild life propagation and stock watering waters.
10. Irrigation waters.
11. Comerce and Industrial waters.
134

-------
SOUTH DAKOTA
Water Quality Standards Or Criteria Used In The Stream Quality Analysis
y Refer to the next sheet for description of uses
V Observed concentration multiplied by 0.226 for compatability in parameter category
/ Observed concentration multiplied by 0.326 for compatability in parameter category
PARAMETER
STORET
CODE
Segment
Classifications And Uses- il
1
1,5,8
2
3,8
3
6,8
4
5,7,
5
1,2,7,8
6
2,8
7
4,7,8
8 9 10 12 13
4,8 3,7,8 2,7,81 1,3,8 1,4,7,8 9,10
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.
31.
32.
33.
34.
35.
36.
37.
38.
39.
40.
41.
42.
43.
0.0.
Fecal Colif.
Fecal Colif.
Fecal Colif.
Total Colt?.
Total Colif.
Total NitriteN
Total Nitrogen
Total NitrateN
Tot. Nitrite NitrateN
Tot. N03 - NO3 J
Tot. PO&. - P
Tot. P0k - POi ,
Tot. Pot.  P
lOS
TDS
TOS
lOS
Conductivity
Turbidity
Susp. Solids
Susp. Solids
Susp. Solids
Chloride
Sulfate
Unionized NH3
NH3 + NH . -N
NH3 + NH.. -N
Cyanide
Arsenic
Total Chromium
Total Selenium
Mercury
Copper
Lead
Zinc
Cadmium
Chromium H-4
Nickel
pH
Hardness
Temp. 0 C
Temp. F
vv. uv
31616
31615
31625
31501
31505
00615
00600
00620
00630
71850
0O 5
00650
70505
00515
70300
70301
70295
00095
00070
00530
70299
80154
00940
00945
00619
00608
00610
00720
1002
103 1
1147
71900
1042
1051
1092
1027
1033
1067
00400
5
200
200
200
5000
5000
.5
10
10
10
10
.1
.1
.1
1000
1000
1000
1000
2500
25
30
30
30
100
500
.02
.02
.02
20
50
50
10
0.2
5
1000
1000
1000
5000
5000
.5
50
50
50
50
.1
.1
i .1
5000
O0Q
5000
5000
2500
25
30
30
30
100
500
.02
.02
.02
20
50
100
10
3.2
5
1000
1000
1000
5000
5000
.5
10
10
10
10
.1
.1
.1
1000
1000
1000
1000
2500
25
90
90
90
250
500
.04
.04
.04
20
50
50
10
.2
.88
1.51
0.64
1.31
0.83
0.47
6.3
5
200
200
200
5000
5000
.5
50
50
50
50
.1
.1
.1
5000
5. QQ
5000
5000
2500
25
90
90
90
250
500
.04
.04
.04
20
50
100
10
3.2
1000
1000
1000
5000
5000
.5
50
50
50
50
.1
.1
.1
5000
5000
5000
5000
2500
25
150
150
150
250
500
.05
.05
.05
20
50
100
10
3.2
6.0
S
1000
1000
1000
50O0
5000
.5
50
50
50
.1
.1
.1
5000
5000
5000
5000
2500
25
90
90
90
250
500
.02
.02
.02
20
50
100
10
3.2
6.5
S
200
200
200
5000
5000
.5
50
50
50
50
.1
.1
.1
5000
5000
3000
5000
2500
25
90
90
90
250
500
.04
.04
.04
20
50
100
10
3.2
6.5
5
1000
1000
1000
5000
5000
.5
50
50
50
50
.1
.1
.1
5000
5000
0O0
5000
2500
25
90
90
90
250
500
.04
.04
.04
20
50
100
10
3.2
a
1000
1000
1000
5000
.5
10
10
10
10
.1
.1
.1
1000
1000
I000
r 0 0 0
2500
25
90
90
90
250
500
.02
.02
.02
20
50
50
10
0.2
5
200
200
200
5000
.5
10
10
10
10
.1
.1
.1
1000
1000
1000
1000
2500
25
90
90
90
250
500
.04
.04
.04
20
50
50
10
0.2
S
200
200
200
5000
.5
50
50
50
50
.1
.1
.1
5000
5t300
s000
5000
2500
25
90
90
90
250
500
.02
.02
.02
20
50
100
10
3.2
6.5
S
200
200
200
5000
.5
50
50
50
50
.1
.1
.1
5000
5O0
5000
5000
2500
25
30
30
30
100
500
.02
.02
.02
20
50
100
10
3.2
6.5
S
1000
1000
1000
5000
.5
50
50
50
50
.1
.1
.1
5000
5000
5000
5000
2500
25
90
90
90
250
500
.05
.05
.05
20
50
100
10
3.2
6.0
6.5 6.6
6.5 6.5
6.5 6.5
135

-------
UTAH
Water Quality Standards
Stream Segment Classifications
EPA Region 8
Segment
Classification Description Code
1C Domestic supply with treatment 19
2B Limited contact recreation 20
3A Cold water game fisheries 21
3B Warm water game fisheries 22
3C Nongame fisheries 23
3D Water oriented wild life use 24
4 AgrIculture use 25
136

-------
UTAH
Water Quality Standards Or Criteria Used In The Stream Quality Analysis
1/ Observed concentration multiplied by 0.226.
/ Observed concentration multiplied by 0.326.
PARAMETER STORET
Classification
CODE IC
2B 3A
3B
3C 3D 4
1. 0.0.
00300
5.5
5.5
6.0
5.5
4.0
5.5
2.0
2. Fecal Colif.
31616
2000
200
200
200
200
2000
2000
3. Fecal Colif.
31615
2000
200
200
200
200
2000
2000
4. Fecal Colif.
31625
2000
200
200
200
200
2000
2000
5. Total Colif.
31501
5000
5000
5000
5000
5000
5000
5000
6. Total Colif.
31505
5000
5000
5000
5000
5000
5000
5000
7. Total NitriteN
00615
1.0
1.0
.05
0.5
0.5
0.5
0.5
8. Total Nitrogen
00600
10
4
4
4
4
4
4
9. Total Nitrate N
00620
10
4
4
4
4
4
4
10. Total Nitrate N
006 0
10
4
4
4
4
4
4
11. Total N03 - N03
71850
jj
10
4
4
4
4
4
4
12. Total POt. - P
00665
.05
.05
.05
O5
.5
.05
.05
13. Total POt. - PO+
00650
.05
.05
.05
.05
.5
.05
.05
14. Total POt, - P
70505
.05
.05
.05
,05
.5
.05
.05
15. TDS
00515
500
500
500
500
500
500
1200
16. lOS
70300
500
500
500
500
500
500
1200
17. TDS
70301
500
500
500
500
500
500
1200
18. TDS
70295
50
50
50
50
50
50
1200
19. Conductivity
20. Turbidity
00095
00070
8.33
25
8.33
25
8.33
25
8.33
25
8.33
25
8.33
25
8.33
25
21. Susp. Solids
22. Susp. Solids
23. Susp. Solids
24. Chloride
00530
70299
80154
00940
90
90
90
250
90
90
90
250
90
90
90
250
90
90
90
250
90
90
90
250
90
90
90
250
90
90
90
250
25. Sulfate
00945
250
250
250
250
250
250
250
26. Unionized NH3
00619
.02
.02
.02
.02
.02
.02
.02
27. NH3 + NOt, -N
00608
.02
.02
.02
.02
.02
.02
.02
28. NH + NO -N
00610
.02
.02
.02
.02
.02
.02
.02
29. Cyanide
00720
.005
.005
.005
.005
.005
.005
.005
30. Arsenic
01002
130
130
130
130
130
130
130
31. Total Chromium
01034
100
100
100
100
100
100
100
32. Total Selenium
01147
22
22
22
22
22
22
22
33. Mercury
71900
2
.05
.05
.05
.05
2
2
137

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WYOMING
Water Quality Standards
Stream Segment Classifications
EPA Region 8
Segment
Classification Description Code
I Nondegradatlon segment 35
II Game fish propagation 36
III Nongame fish propagation 37
IV Unsuitable for fish propagation 38
138

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WYOMING
Water Quality Standards Or Criteria Used In The Stream Quality Analysis
j Observed concentration multiplied by 0.226.
/ Observed concentration multiplied by 0.326.
PARAMETER
STORET
CODE
Classification
I
II
III IV
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.
31.
32.
33.
D.O.
Fecal Colif.
Fecal Colif.
Fecal Colif.
Total Colif.
Total Colif.
Total Nitrite-N
Total Nitrogen
Total Nicrate N
Total Nitrite N
Total N03 - N03
Total PO - P
Total POt, * P0k
Total P0k - P
TDS
TDS
TDS
TDS
Conductivity
Turbidity
Susp. Solids
Susp. Solids
Susp. Solids
Chloride
Sul fate
Unionized NH3
N H 3 + NHt , N
NH 3 + NHt,
Cyanide
Arsenic
Total Chromium
Total Selenium
Mercury
00300
31616
31615
31625
31501
31505
00615
00600
00620
OO6 O
71850 -
00665
00650 2i
70505
00515
70300
70301
70295
00095
00070
00530
70299
80154
00940
00945
00619
00608
00610
00720
1002
1034
1147
71900
6
1000
6
1000
5
1000
200
1000
1000
1000
200
1000
1000
1000
200
1000
1000
1000
200
1000
1000
1000
200
.5
.5
.5
10
10
10
10
10
10
10
10
10
10
10
10
100
10
10
10
10
.1
.1
.1
.1
.1
.1
.1
.1
.1
.1
.1
.1
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500
500
833
833
833
833
25
25
25
25
30
30
90
90
30
30
90
90
30
30
90
90
250
250
250
250
250
250
250
250
.02
.02
.02
.02
.02
.02
.02
.02
.02
.02
.02
.02
.005
.005
.005
.005
130
130
130
130
100
100
100
100
22
22
22
22
3.2
3.2
3.2
3.2
139

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TECHNICAL REPORT DATA
(Please read 1 isrructions on the reverse before completing)
1 REPORT NO 2
EPA - 908/2-80-001
3 RECIPIENTS ACCESSION NO
4 TITLE AND SUBTITLE
Water Quality Trends in Region VIII
(1979 Data)
U.S. Environmental Protection Agency
5 REPORT DATE
0ctober 1980
6 PERFORMING ORGANIZATION CODE
7 AUTHOR(S)
Thomas A. Entzminger, Richard Sotiros,
W. 1. Willin ham
8 PERFORMING ORGANIZATION REPORT NO
9 PERFORMING ORGANIZATION NAME AND ADDRESS
U.S. Environmental Protection Agency
Surveillance And Analysis Division
1860 Lincoln Street
Denver, Colorado 80295
10 PROGRAM ELEMENT NO
11 CONTRACT/GRANTNO
12 SPONSORING AGENCY NAME AND ADDRESS
13 TYPE OF REPORT AND PERIOD COVERED
Final
14 SPONSORING AGENCY CODE
15 SUPPLEMENTARY NOTES
16 ABSTRACT
Water quality trends and status for the calendar year 1979
were determined for the six states in Region VIII. These states include
Colorado, Montana, North Dakota, South Dakota, Utah and Wyoming. Data
resident in the EPA national data bank ( .STORET) were analyzed.
Statistical tests which detect significant differences between two
populations were utilized to show trends in water quality.
The status and severity of stream pollutants were determined by comparing observed
parameter concentrations to state Water Quality Standards or recognized criteria.
17. KEY WORDS AND DOCUMENT ANALYSIS
a DESCRIPTORS
b IDENTIFIERS/OPEN ENDED TERMS
C COSATI held/Group
Water Quality
Water Quality Index
Colorado STORET
Montana
North Dakota
South Dakota
Utah
Wyoming
18 DISTRIBUTION STATEMENT
.
Release to public
19 SECURITY CLASS (Th:sReporr)
Unclassified
21 NO OF PAGES
140
20 SECURITY CLASS (This page)
Unclassified
22 PRICE
EPA Form 22201 (Rev 477)
PREVIOUS EDITION IS OBSOLETE
140

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