«EPA
Water Quality Assessment Summary
EPA^-Retjiosi ¥lll
i
i
^kiigaist 198"

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CONTENTS
List of Tables	i i
List of Figures	iii
Regional Map	1
Introduction	2
Description of the Process	3
State Summaries	4
Colorado	4
Montana	10
North Dakota	18
South Dakota	21
Utah	28
Wyoming	38
Appendix I: Key to Abbreviations	43
i

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FIGURES
1	-	EPA Region VIII	1
2	-	Colorado Water Quality Problem Areas	4
3	-	Montana Water Quality Problem Areas	10
4	-	North Dakota Water Quality Problem Areas	18
5	-	South Dakota Water Quality Problem Areas	21
6	-	Utah Water Quality Problem Areas	28
7	-	Wyoming Water Quality Problem Areas	38
i i

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TABLES
1	- Colorado Stream Segment/Lake Analysis
2	- Colorado Water Quality Problems by Source Category
3	- Montana Stream Segment/Lake Analysis
4	- Montana Water Quality Problems by Source Category
5	- North Dakota Stream Segment/Lake Analysis
6	- North Dakota Water Quality Problems by Source Category
7	- South Dakota Stream Segment/Lake Analysis
8	- South Dakota Water Quality Problems by Source Category
9	- Utah Stream Segment/Lake Analysis
10	- Utah Water Quality Problems by Source Category
11	- Wyoming Stream Segment/Lake Analysis
12	- Wyoming Water Quality Problems by Source Category
5
8
12
16
19
20
22
25
29
34
39
41

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\\
X
Vx-i
Figure 1. EPA Region VIII
1

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INTRODUCTION
Although we in Region VIII advocate the concept of managing for
environmental results, we must become more effective in incorporating the
concept into our management processes. It is important that we put our
limited resources into critical water quality problem areas. In other words,
we must build our planning, budgeting and implementation decision making
processes around accomplishing specific environmental results.
Before environmental managers can assign resources to particular
activities and feel comfortable that those resources are being used in the
most effective manner, they must ask the following questions. Where are the
problems? What are the water quality problems? How serious are the
problems? What are the causes of the problems? A water quality assessment
attempts to answer these questions.
A good water quality assessment is the first and most basic step in the
water quality management (WQM) process. The purpose of this summary
assessment is to assist federal, state and local water quality program
managers to develop and direct their WQM program activities. One of the most
useful features of this summary is the identification of critical pollutants
and priority stream segments and lakes. This identification is based on the
severity of the problem, beneficial uses impaired, population affected, the
feasibility of implementing pollution control programs and other factors.
This summary is an output of the water quality assessment and strategy
meetings held with each state from February through April, 1981. At those
meetings, state and EPA senior managers discussed and agreed upon the nature
and severity of water quality problems. It is our expectation that this
information will be of use to water program managers in the development of
their FY 82 WQM program.
Director
Water Division
Director
Surveillance and Analysis Division
2

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DESCRIPTION OF THE PROCESS
The Water Division Director sent a water quality assessment guidance
document to the states in October 1980. That document provided guidelines for
identifying, evaluating, and prioritizing water quality problems in
preparation for the senior management meetings as identified in each FY 81
SF.A. The guidance document suggested that the states evaluate impaired
(potential) beneficial uses, identify the problem parameters and problem
sources and rank each segment according to the severity of the problem.
The states developed an assessment using available water quality
information and their knowledge of the streams and lakes. Concurrently, EPA
developed an assessment based on current data available in STORET. The STORET
data was analyzed by a team consisting of representatives from the Water and
Surveillance and Analysis Divisions. Stream segments exhibiting exceedence of
water quality standards were evaluated, the parameters and beneficial uses
impaired were identified and points were assigned to each segment based on the
severity of the apparent problem.
The EPA Water Division Director or Surveillance and Analysis Division
Director met with each state's water quality program director during the
period February through April 1981. The purpose of those meetings was to
agree on the critical water quality problems and the geographical areas that
need special attention of state and EPA senior level managers. The water
quality problems identified in this regional summary are an output of those
meetings.
This regional summary presents for each state a map showing priority
problem areas, a table showing the stream segment/lake analysis, and a table
listing the water quality problems by source category. All of the water
quality problems in each state are not included in this document. This
regional summary identifies only the priority areas agreed on by EPA and state
senior management.
The Colorado River Basin is both a national and regional priority.
Salinity is the major basin-wide water quality issue impairing downstream
user's water uses. Since the Colorado River Basin has been identified as a
regional priority, the river has not been addressed in the state summaries.
3

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FIGURE 2. COLORADO WATER QUALITY PROBLEM AREAS
1	- South Platte River (Hampden to Henderson)
2	- South Platte River (Henderson to Kersey)
3	- South Platte River (Kersey to Ft. Morgan)
4	- Cherry Creek Reservoir
5	- Clear Creek (Idaho Springs to Youngfield)
6	- North Fork Clear Creek
7	- St. Vrain Creek (Longmont to mouth)
8	- Big Thompson River (Loveland to mouth)
9	- Little Thompson River (Berthoud to mouth)
10	- Poudre River (Ft. Collins to mouth)
11	- Arkansas River (1-25 to La Junta)
12	- Arkansas River (La Junta to Stateline)
13	- Fountain Creek (Monument Creek to mouth)
14	- Uncompahgre River
15	- San Miguel River (Norwood Canyon to mouth)
4

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TABLE 1. COLORADO STREAM SEGMENT/LAKE ANALYSIS
Segment/Lake
Impaired Use(s)
Problem Parameters*
Source Categories
South Platte River (Hampden
to Henderson)
South Platte River (Henderson to
Kersey)
South Platte River (Kersey to
Ft. Morgan)
Warm water fishery
Secondary contact
recreation
Agriculture
Public water supply
Warm water fishery
Secondary contact
recreation
Warm water fishery
Rjblic water supply
Secondary contact
recreation
U-NH3 f FC,NO2-NO3,
TDS,TP
FC,Cu,NO2-NO3,
SSED
FC,N02-N03,TDS,
TP,SSED,Cu
Urban runoff
Littleton/Englewood
WWTP
Boulder WWTP
Irrigation returns
Upstream discharges
Upstream discharges
Clear Creek (Idaho Springs to
Youngfield)
St.Vrain Creek (Longmont
to mouth)
Cold water fishery
Secondary contact
recreation
Public water supply
Warm water fishery
Secondary contact
recreation
u-NH3,FC,TP,
Cu,Zn,Cd
N02-N03,FC,TDS,
TP,SSED
Inactive mine
Idaho Springs WWTP
Active mine drainage
Longmont WWTP
Irrigation returns
Big Thompson River (Loveland
to mouth)
Warm water fishery
Secondary contact
recreation
Rjblic water supply
Agriculture
FC,N02-N03)TDS,
TP,SSED
Loveland WWTP
* See Appendix I for the key to abbreviations.

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Little Thompson River
(Berthoud to mouth)
Poudre River (Ft. Collins
to mouth)
Warm water fishery
Secondary contact
recreation
Agriculture
Rjblic water supply
Warm water fishery
Primary contact
recreation
Arkansas River (1-25
to La Junta)
Arkansas River (La Junta to
Stateline)
Fountain Creek (Monument
Creek to mouth) ,
Warm water fishery
Rjblic water supply
Secondary contact
recreation
Agriculture
Waim water fishery
Secondary contact
recreation
Rjblic water supply
Agriculture
Warm water fishery
Secondary contact
recreation
FUblic water supply
Agriculture
Uncompahgre River
Cold water fishery
Secondary contact
recreation
Rjblic water supply
Agriculture
FC,N02-N03,TDS,	Irrigation returns
SSED,TP
FC,N02-NC>3,TDSf	Industrial discharge/
TP,SSED	Eastman Kodak
Greeley WWTP
Irrigation returns
FC,Zn,TDS,SSED,	Pueblo WWTP
TP,S04,Cu,Pb,Ag,
u-NH3,Cr,Hg,N02,
DO
Zn,TDS,SSED,N03,	Irrigation returns
TP,S04,FC,Pb	Natural source
u-NH3,FC,Zn,SSED,	Colorado Springs WWTP
TP,TDS,S04,Fe,
NO2-NO3,TN,Cu,Pb
Zn,N03,TDS,
SSED,FC,TP,Turb
Inactive mine drainage
Natural source
Irrigation returns

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San Miguel River (Norwood
Canyon to mouth)
Cherry Creek Reservoir
North Fork Clear Creek
Warm water fishery
Secondary contact
recreation
Cold water fishery
u-NH3,Zn,TDS,
TN,TP
FC,N02-NC>3
TP,Cu,Zn,Cd
Industrial discharge/
Union Carbide
Urban runoff
Inactive mine

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TABLE 2. COLORADO WATER QUALITY PROBLEMS BY SOURCE CATEGORY
POINT SOURCES
STREAM SEGMENT/LAKE
Municipal
Boulder WWTP
Idaho Springs WWTP
Longmont WWTP
Littleton/Englewood WWTP
Greeley WWTP
Rjeblo WWTP
Colorado Springs WWTP
Loveland WWTP
Industrial
Eastman Kodak
Uhion Carbide
NONPOINT SOURCES
South Platte River (Henderson to Kersey)
Clear Creek (Idaho Springs to Youngfield)
St. Vrain Creek (Longmont to mouth)
South Platte River (Hampden to Henderson)
Poudre River (Ft. Collins to mouth)
Arkansas River (1-25 to La Junta)
Fountain Creek (Monument Creek to mouth)
Big Thompson River (Loveland to mouth)
Poudre River (Ft. Collins to mouth)
San Miguel River (Norwood Canyon to mouth)
Urban runoff
Irrigation returns
South Platte River (Hampden to Henderson)
Cherry Creek Reservoir
South Platte River (Henderson to Kersey)
St. Vrain Creek (Longmont to mouth)
Little Thompson River (Berthoud
to mouth)
Poudre River (Ft. Collins to mouth)
Arkansas_ River (La Junta to Stateline)
Big Thompson River (Loveland to mouth)
Uncompahgre River
8

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Natural source
Inactive mine drainage
Uhcompahgre River
Arkansas River (La 3unta to Stateline)
Clear Creek (Idaho Springs to
Young field)
North Fork Clear Creek
Uncompahgre River
9

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Havre
v,—#. 1
afl s
ill a
;na
/>
zeman
Bau from U 3 O«ofc>gical Sufvey. 1885
20 40 60 80 KILOMETERS
114«
1 10*
109*
108*
107*
106*
106*
FIGURE 3. MONTANA WATER QUALITY PROBLEM AREAS

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KEY TO MONTANA WATER QUALITY PROBLEM AREAS *
1
-
Silver Bow Cr./Upper Clark Fork River (Confl. B1acktai1/Deer


Creek to Confl. Little Blackfoot River)
2
-
Clark Fork River (Confl. Little Blackfoot River to Confl.


Blackfoot River)
3
-
Prickly Pear Creek (Confl. Spring Creek to Lake


Helena)
4
-
Muddy Creek
5
-
Belt Creek
6
-
Boulder River (Confl. Cataract Creek to Mouth)
7
-
Beaver Creek (nr Havre)
8
-
Blue Water Creek
9
-
Hot Springs Creek (below Hot Springs water supply intake)
10
-
Lake Bowdoin
11
-
Sand Coulee Creek
12
-
Red Rock Lakes and River
13
-
Soda Butte Creek
14
-
Stillwater River (Confl. Logan Creek to Mouth)
15
-
E. Poplar River (from border) and Main Poplar River (to Mouth)
16
-
Whitefish River (below Whitefish Lake to Mouth)
17
-
Grasshopper Creek
18
-
Fisher River
19
-
Little Big Horn River
20
-
East Gal 1atin River
21
-
Georgetown Lake
22
-
Rosebud Creek
23
-
Mission Creek
24
-
Post Creek
25
-
Crow Creek
26
-
Madison River (below Ennis Lake)
27
-
Birch Creek
28
-
Snowshoe Creek
29
-
Camp Creek
30
-
Godfrey Creek
31
-
Whitefish Lake
32
-
Little Peoples Creek
33
-
Foys Lake
34
-
Lake Mary Ronan
The methodology described on page 3 is not applicable for the Montana
assessment. The Montana problem assessment is a result of numerous
discussions with the State of Montana's Water Quality Bureau staff and
is based primarily upon subjective professional judgement considering
the most recent water quality data.
11

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TABLE 3 - MONTANA STREAM SEGMENT/LAKE ANALYSIS
SEGMENT/LAKE
IMPAIRED USE(s)
PROBLEM PARAMETERS
SOURCE CATEGORIES
IV)
Silver Bow Cr./Upper Clark
Fork River Confl. Blacktail
Deer Cr. to Confl. Little
Blackfoot River
*Clark Fork River
Confl. Little Blackfoot
River to Confl. Blackfoot
River
Prickly Pear Creek
Confl. Spring Creek to
Lake Helena
*Muddy Creek
Belt Creek
Boulder River
Confl. Cataract Creek
to Mouth
Fish & aquatic life
Agriculture
Recreation
Fish & aquatic life
Recreation
Fish & aquatic life
Agriculture
Recreation
Fish & Aquatic life
Recreation
Agriculture
Fish & Aquatic life
Recreation
Agriculture
Fish & Aquatic 1lfe
Recreation
Metals,
N, P
N, P, Temp, DO
Metals, NH3
No Flow
TSS, N, P
Metals
Metals
N, P, TDS
Temp, TSS
Mining
Butte WWTP
Anaconda WWTP
Deer Lodge WWTP
Irrigated agriculture
Natural
Butte WWTP
Anaconda WWTP
Deer Lodge WWTP
Hydrologic Modification
Inactive Mining
Helena WWTP & storm water
runoff
East Helena WWTP & storm
water runoff
Irrigation (dewatering)
Agriculture (Grazing)
Hydrologic Modification
Irrigated agriculture
Natural
Inactive mining
Inactive mining
Boulder WWTP
Hydrologic Modification
Irrigated agriculture
(dewatering)
^Activities are underway to address this problem.

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SEGMENT/LAKE
IMPAIRED USE(s)
*Beaver Creek nr Havre
*B1ue Water Creek
Fish & Aquatic life
Recreation
Fish & Aquatic life
Agriculture
*Hot Springs Creek	Fish & Aquatic life
below Hot Springs water
supply intake
Lake Bowdoin	Fish & Aquatic life
Agriculture
Sand Coulee Creek
Red Rock Lakes anil River
Fish & Aquatic
Recreation
Agriculture
1 lfe
Fish & Aquatic 1lfe
Recreation
Soda Butte Creek
Fish & Aquatic 1ife
Recreation
*Sti1lwater River
Conf1. Logan Creek to
Mouth
Fish & Aquatic life
Recreation
*Activities are underway to address this problem.
PROBLEM PARAMETERS
SOURCE CATEGORIES
TSS, Temp, FC
Lowflow
TSS
TSS, FC
TDS
Metals
Low pH
N, P, TSS
Metals
low pH
Hydrologic modification
Agriculture (Grazing)
Irrigated agriculture
Natural
Hydrologic modification
Hot Springs WWTP
Natural hot springs
Agriculture (Grazing)
Hydrologic modification
(Salt concentration due to
inadequate flow control)
Inactive mining (coal)
Hydrologic modification
(flow fluctuations
exacerbate pollution from
waterfowl)
Agriculture (Grazing)
Inactive Mining
N, P, TSS
Irrigated agriculture
Forestry
Septic Systems

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SEGMENT/LAKE
IMPAIRED USE(s)
E. Poplar River from border
and Main Poplar River to
Mouth
*Whitefish River below
Whitefish Lake to Mouth
Agriculture
Fish & Aquatic 1lfe
Recreation
Grasshopper Creek
*Fisher River
Little Big Horn River
Fish & Aquatic life
Recreation
Fish & Aquatic life
Recreation
Fish & Aquatic life
*East Gallatin River
^Georgetown Lake
Fish & Aquatic life
Recreation
Fish & Aquatic life
Recreation
Public water supply
Rosebud Creek
Fish & Aquatic life
*Mission Creek	Fish & Aquatic life
Recreation
*Activities are underway to address this problem.
PROBLEM PARAMETERS
B, TDS, FC
N, P, TSS
TSS, Metals
TSS
TSS
NH3, low flow, DO, FC
N, P, DO
Eutrophication
TSS
N, TSS, FC
SOURCE CATEGORIES
Canadian energy develop-
ment-dewatering
Agriculture
Whitefish WWTP
Urban stormwater runoff
Inactive Mining
Agriculture (Grazing)
Hydrologic Modification
Natural
Agriculture
Natural
Urban storm runoff
Bozeman WWTP
Construction
Hydrologic modification
Septic tanks (?)
Agriculture
Natural
Irrigated agriculture

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SEGMENT/LAKE
IMPAIRED USE(s)
*Post Creek
*Crow Creek
*Madison River below
Ennis Lake
Birch Creek
Snowshoe Creek
*Camp Creek
~Godfrey Creek
*Whitefish Lake
Little Peoples Creek
Foys Lake
*Lake Mary Ronan
Fish & Aquatic	life
Recreation
Fish & Aquatic	1lfe
Fish & Aquatic	life
Fish & Aquatic life
Agriculture
Fish & Aquatic life
Fish & Aquatic life
Recreation
Aquatic life
Livestock watering
Fish & Aquatic 1lfe
Public water supply
Fish & Aquatic 1lfe
Agriculture
Recreation
Fish & Aquatic life
Fish & Aquatic 1ife
Recreation
~Activities are underway to address this problem.
PROBLEM PARAMETERS
SOURCE CATEGORIES
N, FC, TSS, P
N, FC, TSS, DO, P
Temp, As, F1
TSS, N, P, TDS, DO
Temp
Metals
FC, TSS
TSS, FC
N, P, TSS
TSS
Metals
N, P, DO, TDS
High pH
N, P, FC, DO
Irrigated agriculture
Irrigated agriculture
Hydrologic modification
Natural
Irrigated agriculture
Hydrologic modification
Mini ng
Natural
Agriculture
Construction
Agriculture
Construction
Natural
Septic Systems
Recreational development
Mining
Agriculture (Grazing)
Agriculture
Septic systems
Agriculture (Grazing)
Septic systems
Natural

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TABLE 4 - MONTANA WATER QUALITY PROBLEMS BY SOURCE CATEGORY
Point Sources
Stream Segment/LAKE
Municipal
Butte WWTP
Anaconda WWTP
Deer Lodge WWTP
Helena WWTP
East Helena WWTP
Boulder WWTP
Hot Springs WWTP
Whitefish WWTP
Bozeman WWTP
Silver Bow Cr./Upper
Silver Bow Cr./Upper
Silver Bow Cr./Upper
Prickly Pear Creek
Prickly Pear Creek
Boulder River
Hot Springs Creek
Whitefish River
East Gal 1atin River
CI ark
Clark
CI ark
Fork
Fork
Fork
River
River
River
Nonpoint Sources
Grazing
Irrigated agriculture
Beaver Creek
Hot Springs Creek
Red Rock Lakes and River
Grasshopper Creek
Little Peoples Creek
Lake Mary Ronan
Silver Bow Cr./Upper Clark Fork River
Prickly Pear Creek
Muddy Creek
Boulder River
Blue Water Creek
Stillwater River
Mission Creek
Post Creek
Crow Creek
Birch Creek
Nonirrigated agriculture
Whitefish River
Little Big Horn River
Rosebud Creek
Camp Creek
Godfrey Creek
Foys Lake
16

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Nonpoint Sources (continued)
On site disposal
Construction
Mining
Urban Runoff
Sti1lwater River
Georgetown Lake (?)
Whitefish Lake
Foys Lake
Lake Mary Ronan
Georgetown Lake
Camp Creek
Godfrey Creek
Silver Bow Cr./Upper Clark Fork River
Prickly Pear Creek
Belt Creek
Boulder River
Sand Coulee Creek
Soda Butte Creek
Grasshopper Creek
Snowshoe Creek
Little Peoples Creek
Prickly Pear Creek
Whitefish River
East Gallatin River
Hydrologic Modification
Clark Fork River
Prickly Pear Creek
Boulder River
Beaver Creek
Blue Water Creek
Lake Bowdoin
Red Rock Lakes and River
Fisher River
Georgetown Lake
Madison River
Birch Creek
Forestry
Canadian Energy Development
dewateri ng
Sti1lwater River
East Poplar River
Main Poplar River
17

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, MOM Ml
Devils Loke
Woahburn
Or'
BALOHILL
JAWCSTOWN'
;anton
FIGURE 4. NORTH DAKOTA WATER QUALITY PROBLEM AREAS
1	- Souris River
2	- Red River
3	- Spiritwood Lake
A - Lake Metigoshe
5	- Sweetbriar Lake
6	- Brewer Lake
18

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Segment/Lake
Souris River - Segment 02
Confluence with Des Lacs
River to confluence with
Deep River
Souris River - Segment 03
Confluence with Deep River
to Canadian border
Red River - Segment 02
Confluence with Wild Rice
River to confluence with
Sheyenne River
Red River - Segment 03
Confluence with Sheyenne
^ River to confluence with
Turtle River
Spiritwood Lake
Lake Metigoshe
Sweetbriar Lake
Brewer Lake
TABLE 5. NORTH DAKOTA STREAM SEGMENT/LAKE	ANALYSIS
Impaired Use(s) Problem Parameters	Source Categories
Warm Water Fishery DO,TP,Low Flow	Non-irrigated agriculture
Recreation	Minot WWTP
Warm Water Fishery
Recreation
DO,TP,Low Flow
Non-irrigated agriculture
Waterfowl concentrations
Recreation
Stockwatering
TP,FC
Non-irrigated agriculture
Moorhead WWTP, Minnesota
Recreation
Stockwatering
TP.FC
Non-irrigated agriculture
Recreation
Fisheries
Recreation
Fisheries
Recreation
Fisheries
Recreation
Fisheries
TP,TN,SSED
TP,TN
TP,TN,SSED
TP,TN,SSED
Non-irrigated agriculture
On-site disposal
On-site disposal
Non-irrigated agriculture
Livestock wintering
Non-irrigated agriculture

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TABLE 6. NORTH DAKOTA WATER
Point Sources
Municipal
Minot WWTP
Moorhead WWTP, Minnesota
Njnpoint Sources
Agriculture
Non-irrigated agriculture
On-site disposal
Waterfowl concentrations
Livestock wintering
QUALITY PROBLEMS BY SOURCE CATEGORY
Stream Segment/Lake
Souris River
Red River
Red River
Spiritwood Lake
Sweetbriar Lake
Brewer Lake
Souris River
Spiritwood Lake
Lake Metigoshe
Souris River
Sweetbriar Lake
20

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1
2
3
A
5
6
7
8
9
10
11
12
13
14
15
16
SOUTH DAKOTA WATER QUALITY PROBLEM AREAS
-	Lower Big Sioux River
-	Lower Cheyenne River
-	Middle Whitewood River
-	White River
-	Lower Rapid Creek
-	Whetstone River
-	Fall River
-	Little White River
-	Bad River
-	Upper Cheyenne River
-	Vermillion River (lower)
-	Upper James River (at Huron)
-	Grand River (Southfork)
-	Lower James River (at Scotland)
-	Keya Paha River
-	Upper Big Sioux River
21

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TABLE 7. SOUTH
Segment/Lake
Lower Big Sioux River
(Dell Rapids to Missouri
River)
Impaired Use(s)
Warm water fishery
Recreation - immersion
Recreation - limited
contact
Rjblic water supply
Lower Cheyenne River	Warm water fishery
(Wasta to Oahe Reservoir) Recreation - immersion
Recreation - limited
contact
Irrigation
Middle Whitewood Creek
(Lead to Belle Fourche
River)
Cold water fishery
Warm water fishery
Recreation - immersion
Recreation - limited
contact
IOTA STREAM SEGMENT/LAKE ANALYSIS
Problem Parameters
N03,TP,FC,D0,CN,
u-NH3,SSED,COND
N03,Cr,Hg Cu,
DO,TP,C0ND,
FC,SSED,TDS
Hg,CN,FC,u-NH3,
SSED,As,Cu,Cr
Source Categories
Sioux Falls WWTP
John Morrell WWTP
Brandon WWTP
Alcester WWTP
EROS
Canton Livestock Sales
Sioux Falls Stockyards
Agriculture
Grazing
Urban runoff
Construction
Feedlots
Dell Rapids WWTP
Homestake WWTP
Agriculture
Feedlots
Grazing
St. Regis Paper
Whitewood Post and Pole
Strawberry Hill Mining Co.
Whitewood WWTP
St.Regis Paper
Whitewood Post and Pole
Homestake Mine
Lead-Deadwood WWTP
Kirk Power Plant
Strawberry Hill Mining Co.
Acid mine drainage
On-site direct discharge
Mine tailings

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White River
(Nebraska border to
Missouri River)
Warm water fishery
Recreation - limited
contact
Lower Rapid Creek
(Dark Canyon to Cheyenne
River)
Whetstone River (South Fork)
Fall River
(Headwaters to Cheyenne
River)
Little White Rivef
(Headwaters to White River)
Bad River (Headwaters to
Missouri River)
Upper Cheyenne River
(Wyoming border to
Angostura Reservoir)
Warm water fishery
Recreation - immersion
Recreation - limited
contact
Irrigation
Wildlife propagation
and stock watering
Warm water fishery
Recreation - limited
contact
Irrigation
Warm water fishery
Cold water fishery
Recreation - limited
contact
Warm water fishery
Recreation - limited
contact
Warm water fishery
Recreation - limited
contact
Irrigation
Warm water fishery
Recreation - limited
contact
Irrigation
D0,TP,FC,SSED,N03, Agriculture
Cr,Ag,Hg,Cu,Pb,Zn,Cd Badlands (natural
source)
Grazing
N03,u-NH3,TP,	Rapid City WWTP
FC,SSED	Irrigation
Feedlots
Grazing
On-site disposal
Urban runoff
u-NH3,TKN,FC,D0,	Milbank WWTP
COND
Fe,NO3,TP,TDS,FC	Hot Springs WWTP
FC,TP,SSED	Grazing
Agriculture
TP,COND,FC,SSED,TDS Grazing
Low flow
TP,FC,DO,TDS,COND,
SSED
Edgemont WWTP
Newcastle WWTP, Wyo.
Grazing
Low flow
Wyoming sources
Mining

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Vermillion River
(Headwaters to Missouri
River)
Warm water fishery
Recreation - limited
contact
Upper James River (North
Dakota border to Huron)
Public water supply
Warm water fishery
Grand River (South Fork)
Lower James River (Milltown
to Mayfield)
Warm water fishery
Recreation - limited
contact
Warm water fishery
Recreation - limited
contact
Keya Paha River
Upper Big Sioux River
(Watertown to Castlewood)
Warm water fishery
Recreation - limited
contact
Public water supply
Warm water fishery
Recreation - limited
contact
TP,FC,SSED,u-NH3	Centerville WWTP
Vermillion WWTP
Chancellor WWTP
Agriculture
Feedlots
Grazing
DO,TP,TDS,Cd,SSED	Redfield WWTP
Agriculture
Feedlots
Grazing
Stratford WWTP
Aberdeen WWTP
Huron WWTP
TP,CONDfFC,SSED,	Possible agriculture
Irrigation	DO, TDS	Grazing
Low Flow
D0,TP,SSED	Scotland WWTP
Menno WWTP
Wolf Creek
Colony WWTP
Maxwell Colony WWTP
Parkston WWTP
Feedlots
Runoff from land
application of whey
DO,FC,TP,SSED	Preservation stream
D0,FC,TDS,u-NH3
Watertown WWTP
Grazing
Urban runoff

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TABLE 8. SOUTH DAKOTA WATER QUALITY PROBLEMS BY SOURCE CATEGORY
Point Sources
Municipal
Sioux Falls WWTP
Brandon WWTP
Alcester WWTP
Dell Rapids WWTP
Whitewood WWTP
Lead-Deadwood WWTP
Rapid City WWTP
Milbank WWTP
Hot Springs WWTP
Eidgemont WWTP
Newcastle, Wyoming WWTP
Centerville WWTP
Vermillion WWTP
Chancellor WWTP
Redfield WWTP
Stratford WWTP
Aberdeen WWTP
Huron WWTP
Scotland WWTP
Menno WWTP
Wolf Creek Colony WWTP
Maxwell Colony WWTP
Parkston WWTP
Homestake WWTP
Watertown WWTP
Industrial/Feedlots
EROS
John Morrell
Sioux Falls Stockyards
Canton Livestock Sales
St. Regis Paper
Whitewood Fbst and Ftile
Strawberry Hill Mining I
Lower Big Sioux River
Middle Whitewood Creek
Lower Rapid Creek
Whetstone River
Fall River
Upper Cheyenne River
Vermillion River
Upper James River
Lower James River
Lower Cheyenne River
Upper Big Sioux River
Lower Big Sioux River
Lower Cheyenne River
25

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St. Regis Paper
Whitewood Post and Pole
Kirk Power Plant
Strawberry Hill Mining Co.
Homestake Mine
Middle Whitewood Creek
Feedlots
Nonpoint Sources
Agriculture
Grazing
Lower Rapid Creek
Vermillion River
Upper James River
Lower James River
Lower Big Sioux River
Lower Cheyenne River
Lower Big Sioux River
Lower Cheyenne River
White River
Lower Rapid Creek
Upper Big Sioux River
Little White River
Bad River
Upper Cheyenne River
Vermillion River
Upper James River
Grand River
Nbn-irrigated agriculture
Irrigated agriculture
Runoff from land
application of whey
Lower Big Sioux River
Lower Cheyenne River
White River
Little White River
Vermillion River
Upper James River
Lower Big Sioux River
Lower Rapid Creek
Lower James River
26

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On-site disposal
Construction
Urban runoff
Acid mine drainage
Low flow
Flow preservation
Mine tailings
Lower Rapid Creek
Fall River
Middle Whitewood Creek (direct
discharge)
Lower Big Sioux River
Lower Big Sioux River
Lower Rapid Creek
l£per Big Sioux River
Middle Whitewood Creek
Bad River
Upper Cheyenne River
Grand River
Keya Paha River
Middle Whitewood Creek
27

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24
.T LAKE CITY
UTAH
LAK£
Redmond®'
SlVHR
LAK£
Monti cello0]
FIGURE 6. UTAH WATER QUALITY PROBLEM AREAS
1, 2, 3
- Jordan River
16
-
Beer Creek
A
- Provo River
17
-
Sevier River
5
- Snake Creek
18
-
Little Bear River
6
- East Canyon Creek
19
-
Ashley Creek
7
- Price River
20
-
Weber River
8
- Pleasant Valley Creek
21
-
San Pitch River
9
- Big Cottonwood Creek
22
-
Bear River
10
- Little Cottonwood Creek
23
-
Duchesne River
11
- Mill Creek
24
-
Clarkston Creek
12
- Bear River
25
-
Sevier River
13
- Weber River
26.
-
Fort Creek
14
- Spanish Fork River
27, 28
-
Sevier River
15
- Benjamin Slough
29
-
Kanab Creek
28

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Segment/Lake
TABLE 9.
Impaired Use(s)
Jordan River
Farmington Bay - North
Temple
Recreation - limited
contact
Non-game fishery
Irrigation
Jordan River
North Temple to Little
Cottonwood Creek Confluence
Recreation - limited
contact
Warm water fishery
Irrigation
Jordan River
Confluence Littlp
Cottonwood Creek to
Narrows
Recreation - limited
contact
Cold water fishery
Irrigation
Provo River and Snake Creek Rjblic water supply
Recreation - limited
contact
Cold water fishery
Irrigation
UTAH STREAM SEGMENT/LAKE ANALYSIS
Problem Parameters Source Categories
TN,TP,DO,TC,TDS,FC Urban runoff
Natural source
Feedlots
Construction
Hydrologic modification
South Davis WWTP
Upstream conditions (Utah Lake)
TN,D0,FC,S0/j,Hg	Urban runoff
Natural source
Upstream conditions (Utah Lake)
Feedlots
Irrigated agriculture
Construction
Hydrologic modification
Central Valley WWTP
TP,TC,FC,B0D,D0,	Urban runoff
Hg,Temp,TDS,TN	Natural source
Upstream conditions (Utah Lake)
Feedlots
Irrigated agriculture
Construction
Hydrologic modification
South Valley WWTP
TP,TC,FC,Temp,Cu,Hg,
TDS,B0D
Irrigated agriculture
Hydrologic modification
Livestock
Grazing
On-site disposal
Feedlots
Dairies
Heber Valley WWTP

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East Canyon Creek
Public water supply
Cold water fishery
Irrigation
Price River - Blue	Public water supply
Cut Diversion to Head-	Irrigation
waters.
Pleasant Valley Creek from
Scofield Reservoir to
Headwaters
Big Cottonwood Creek,
Little Cottonwood Creek and
Mill Creek
Recreation - limited
contact
Cold water fishery
Irrigation
Bear River
Cache Co.
Warm water fishery
Waterfowl
Irrigation
Weber River	Cold water fishery
Slaterville Diversion	Irrigation
to Stoddard Diversion
TP,Cu,Hg,TC,	Irrigated agriculture
BOD,FC,Turb	Upstream conditions
Livestock
Construction
Snyderville Basin WWTP
TDS,TP,FC,Hg	Natural source
On-site disposal
Construction
Mining
Grazing
Livestock
Kenilworth WWTP
TP,DO,TC,BOD	Urban runoff
Hydrologic modification
Construction
Irrigated agriculture
Upstream conditions
Salt Lake Co. Cottonwood WWTP
Central Valley WWTP (Potential
discharge to Mill Creek)
TP,BOD,IDS	Irrigated agriculture
Dairies
Feedlots
Natural source
Upstream conditions
Hydrologic modification
Smithfield WWTP
TP,B	Urban runoff
Hydrologic modification
Upstream conditions
Construction
Livestock
Mountain Green WWTP

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Spanish Fork River,
Benjamin Slough and
Beer Creek
Warm water fishery
Waterfowl
Irrigation
Sevier River
Yuba Dam to Rocky Ford
Reservoir
Warm water fishery
Irrigation
Little Bear River
Hyrum Reservoir.
Headwaters
to
Cold water fishery
Waterfowl
Irrigation
Ashley Creek
Mouth to Vernal
Warm water fishery
Irrigation
Weber River
Great Salt Lake to
Slaterville
Non-game fishery
Waterfowl
Irrigation
TP,B0D,u-NH3,TDS	Irrigated agriculture
Grazing
Natural source
On-site disposal
Livestock
Payson WWTP
Salem WWTP
Turb,N03,TP	Irrigated agriculture
Cu,TDS	Grazing
Natural source
Hydrologic modification
Feedlots
Redmond WWTP
Turb,TP,Temp	Irrigated agriculture
Grazing
Feedlots
Natural source
Dairies
Hydrologic modification
White Trout Farms
TP,TDS	Irrigated agriculture
Natural source
H/drologic modification
Grazing
Vernal WWTP
TP,Hg,Cu,	Irrigated agriculture
SSED,D0,B	Urban runoff
Grazing
Livestock
Hydrologic modification
Upstream conditions
Central Weber WWTP

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San Pitch River
Mouth to Ut. Hwy. 132
Non-game fishery
Irrigation
Bear River
Box Elder Co.
Recreation - limited
contact
Warm water fishery
Waterfowl
Irrigation
Duchesne River
Mouth to Myton
Diversion
Warm water fishery
Irrigation
Clarkston Creek
Warm water fishery
Sevier River
Lynndyl to Juab Co.
Warm water fishery
Irrigation
Fort Creek
Rjblic water supply
Cold water fishery
Irrigation
TDS,TP,B0D	Natural source
Irrigated agriculture
Grazing
Livestock
Hydrologic modification
Ephraim WWTP
Turb,TP,TC,Cl,	Natural source
FC,Cu,Zn,TDS	Upstream conditions
Irrigated agriculture
Hydrologic modification
Feedlots
Livestock
Turb,TP,Cu,B,TDS	Irrigated agriculture
Natural source
Hydrologic modification
Grazing
Livestock
TP,SSED	Livestock
Grazing
Feedlots
Irrigated agriculture
TP,Hg,DO,TDS	Natural source
Irrigated agriculture
Hydrologic modification
Grazing
Livestock
Upstream conditions
TP,Cd,TC	Feedlots
Irrigated agriculture
On-site disposal
Livestock

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Sevier River
Gunnison Bend Reservoir
to Lynndyl
Sevier River
Annabella Diversion
to Garfield Co.
Kanab Creek
Fast of Alton
CO
CO
Non-game fishery
Irrigation
Cold water fishery
Irrigation
Cold water fishery
Irrigation
TDS,BOD,SSED,TP,Hg
Natural source
Hydrologic modification
Irrigated agriculture
Turb.TPjHg,	Irrigated agriculture
Temp,Cu,DO	Grazing
Livestock
Construction
Natural source
Upstream conditions
Hydrological modification
Panguitch WWTP
TP,TDS,Zn,	Grazing
Temp,DO,BOD	Natural source
Irrigated agriculture
Livestock
Hydrologic modification

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TABLE 10. UTAH WATER QUALITY PROBLEMS BY SOURCE CATEGORY
Point Sources	Stream Segment/Lake
Municipal
South Davis WWTP
Central Valley WWTP
South Valley WWTP
Heber Valley WWTP
Snyderville Basin WWTP
Jordan River
Provo River
East Canyon Creek
Kenilworth WWTP
Salt Lake Co. Cottonwood
WWTP
Central. Valley WWTP
Smithfield WWTP
Mountain Green WWTP
Payson WWTP
Salem WWTP
Redmond WWTP
Panquitch WWTP
Vernal WWTP
Central Weber WWTP
Ephraim WWTP
Price River
Big Cottonwood Creek
Mill Creek (potential receiving
stream)
Bear River
Weber River
Beer Creek
Sevier River
Ashley Creek
Weber River
San Pitch River
34

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Industrial
White Trout Farms
Dairies
Feedlots
Little Bear River
Little Bear River
Provo River
Bear River
Little Bear River
Jordan River
Provo River
Bear River
Sevier River
Clarkston Creek
Fort Creek
Nonpoint Sources
Agriculture
Grazing
Provo River
Price River
Weber River
Spanish Fork River
Benjamin Slough
Beer Creek
Sevier River
Little Bear River
Ashley Creek
San Pitch River
Duchesne River
Clarkston Creek
Kanab Creek
Irrigated agriculture
Jordan River
Provo River
East Canyon Creek
8ig Cottonwood Creek
Little Cottonwood Creek
Mill Creek
Bear River
Weber River
Spanish Fork River
Benjamin Slough
BeeT Creek
Sevier River
Little Bear River
Ashley Creek
San Pitch River
Clarkston Creek
Fort Creek
Kanab Creek
35

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Livestock
Construction
Provo River
East Canyon Creek
Price River
Bear River
Weber River
Spanish Fork River
Benjamin Slough
Beer Creek
Sevier River
San Pitch River
Duchesne River
Clarkston Creek
Fort Creek
Kanab Creek
Jordan River
E. Canyon Creek
Price River
Big Cottonwood Creek
Little Cottonwood Creek
Mill Creek
Weber River
Sevier River
On-site disposal
Provo River
Price River
Spanish Fork River
San Pitch River
Fort Creek
Hydrologic modification
Jordan River
Provo River
Big Cottonwood Creek
Little Cottonwood Creek
Mill Creek
Bear River
Weber River
Sevier River
Little Bear River
Ashley Creek
Weber River
San Pitch River
Bear River
Duchesne River
Kanab River
36

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Mining
Price River
Nfetural source
Jordan River
Price River
Bear River
Spanish Fork River
Sevier River
Little Bear River
Ashley Creek
San Pitch River
Duchesne River
Kanab Creek
Urban runoff
Jordan River
Big Cottonwood Creek
Little Cottonwood Creek
Mill Creek
Weber River
37

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*JL/.	
FIGURE 7. WYOMING WATER QUALITY PROBLEM AREAS
1	- Flaming Gorge Reservoir
2	- Bitter Creek
3	- Beaver Creek
A - Big Horn River
5	- Haggerty Creek
6	- Big Sandy River
7	- Flat Creek and Salt River
8	- Bear River
9	- Bates Creek
10	- Sage Creek
11	- Clear Creek
12	- Fifteen Mile Creek
13	- Goose Creek
14	- Salt Creek
15	- North Platte River below Guernsey Darn
16	- Ocean Lake
38

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TABLE 11. WYOMING STREAM SEGMENT/LAKE ANALYSIS
Segment/Lake
Flaming Gorge Reservoir**
Impaired Use(s)
Cold water fishery
Primary and secondary
recreation
Problem Parameters
TP,TN,SSED
Source Categories
Natural source
Urban runoff
Drilling operations
Irrigation return flow
Construction
Rock Springs WWTP - Bitter Creek
Green River WWTP - Green River
Grazing
Bitter Creek near Powell
Cold water fishery
Public water supply
Secondary recreation
SSED,FC,TP,TN
Beaver Creek near Newcastle Irrigated agriculture
Big Horn River from Lucerne
to Big Horn Reservoir
Haggerty Creek
Big Sandy River
Flat Creek and
Salt River
Bear River below Evanston
Cold water fishery
Rjblic water supply
Cold water fishery
Industrial
Public water supply
Irrigated agriculture
Cold water fishery
Aesthetics
Secondary recreation
Cold water fishery
Secondary recreation
TDS
SSED,TP,TNfTDS,SC>4
Cu
TDS
D0,TDS,FC,
Floating and
settleable solids
Powell WWTP
Irrigation return flow
Natural source
On-site disposal
Uncapped brine wells
Irrigation return flow
Grazing
Abandoned copper mine - Dos Lomas
Irrigation return flow
Big Sandy Reservoir seepage
Star Valley Cheese
Thayne WWTP
do,nh3,fc
Evanston WWTP
** Problems in Flaming Gorge Reservoir are primarily from Black's Fork, Henry's Fork, Bitter Creek, Killpecker Creek,
Salt Wells, Mjddy Creek drainage basins.

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Bates Creek	Cold water fishery
Public water supply
Sage Creek	Cold water fishery
Public water supply
Clear Creek	Cold water fishery
Secondary recreation
Fifteen Mile Creek	Public water supply
Goose Creek	Cold water fishery
Primary recreation
Salt Creek	Irrigated agriculture
North Platte River below	Cold water fishery
Guernsey Dam
Ocean Lake
Cold water fishery
Primary and secondary
recreation
SSED
SSED
D0,FC,NH3
SSED,TP,TN
TDS
D0,FC,NH3
TDS
SSED
Dewatering
TP,SSED
Grazing
Natural source
Grazing
Natural source
Buffalo WWTP
Grazing
Natural source
Sheridan WWTP
Oil treater discharge
Grazing
Natural source
(kjernsey Silt Run
Irrigation return flows
Natural source

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TABLE 12. WYOMING WATER QUALITY PROBLEMS BY SOURCE CATEGORY
Point Sources
Municipal
Powell WWTP
Rock Springs WWTP
Green River WWTP
Thayne WWTP
Evanston WWTP
Buffalo WWTP
Sheridan WWTP
Industrial
Drilling operations
Uncapped brine wells
Dos Lumas abandoned copper mine
Star Valley Cheese
Oil treater discharge
Guernsey Silt Run
Nonpoint Sources
Agriculture
Irrigation return flow
Grazing
Stream Segment/Lake
Bitter Creek near Powell
Flaming Gorge Reservoir - Bitter
Creek
Flaming Gorge Reservoir - Green
River
Salt River
Bear River
Clear Creek
Goose Creek
Flaming Gorge Reservoir
Beaver Creek
Haggerty Creek
Salt River
Salt Creek
North Platte River
Flaming Gorge Reservoir
Bitter Creek near Powell
Big Sandy River
Big Horn River
Ocean Lake
Bitter Creek
Flaming Gorge Reservoir
Bates Creek
Sage Creek
Fifteen Mile Creek
Salt Creek
41

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Urban runoff
Construction
Natural source
Flaming Gorge Reservoir
Flaming Gorge Reservoir
Flaming Gorge Reservoir
Bitter Creek near Ftowell
Bates Creek
Sage Creek
Fifteen Mile Creek
Salt Creek
Ocean Lake
42

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APPENDIX I
KEY TO ABBREVIATIONS
Ag - silver
As - arsenic
B - boron
Cd - cadmium
CI - chloride
CN - cyanide
COND - conductivity
Cr - chromium
Cu - copper
DO - disolved oxygen
FC - fecal colifoim
Fe - iron
Hg - mercury
NH3 - ammonia
NO2 - nitrite
NO3 - nitrate
Pb - lead
SO4 - sulfate
SSED - suspended sediment
TC - total coliform
TDS - total disolved solids
Temp - temperature
TKN - total Kjeldahl nitrogen
TN - total nitrogen
TP - total phosphorus
Turb - turbidity
U-W3 - unionized ammonia
WWTP - waste water treatment plant
Zn - zinc
43

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