WORKING PAPER NO. 47
COLUMBIA RIVER BASIN PROJECT
For Water Supply and Water Quality Management
IRRIGATION RETURN FLOW STUDY
WAPATO IRRIGATION DISTRICT
YAKIMA RIVER BASIN
WASHINGTON
DATE; May 1964 DISTRIBUTION;
Prepared by WEB & WAM Project Staff
Reviewed by Cooperating Agencies
Approved by General
U. S. DEPARTMENT OF HEALTH, EDUCATION,.AND WELFARE
Public Health Service
Region IX
Division of Water Supply and Pollution Control
570 Pittock Block
Portland 5, Oregon
-------
This working paper contains preliminary data and information primarily
intended for internal use by the Columbia River Basin staff and
cooperating agencies. The material presented in this paper has not
been fully evaluated and should not be considered as final.
-------
IRRIGATION RETURN FLOW STUDY
WAPATO IRRIGATION DISTRICT
YAKIMA RIVER BASIN
WASHINGTON
ABSTRACT
A study of return flows in the Wapato Irrigation District in the Yakima
River Basin in central Washington was made during the 1963 irrigation season
to determine effects of the (principally) irrigation use on water quality.
Parameters investigated included temperature, oxygen demand, hardness, tur-
bidity, coliform bacteria,.pesticide toxins, and various nutrient ions.
Some degradation of quality was observed for nearly every parameter, but the
overall effect was not severe. The chief recommendations for improvement of
water quality involve improvements in amount and timing and method of appli-
cation of the irrigation water, and a continuing educational safety campaign
on use of pesticides.
THE STUDY
INTRODUCTION
This study was initiated in the spring of 1963 to develop information
needed for planning the protection and management of water resources and
water quality in arid portions of the Columbia River Basin. The area se-
lected for study lies near the center of the basin and typifies much of the
irrigated crop and pasture land of the basin.
The study was aimed at determining the kinds and amounts of chemicals
applied to the land, the kinds and amounts of chemicals removed from the
land by irrigation return flows, and at determining how to minimize any ad-
verse effects through modification of land use and irrigation practices.
SCOPE
The study covered the Wapato Irrigation District on the Yakima Indian
Reservation in southwestern Yakima County in central Washington, including
136,000 acres of irrigable area of which about 118,000 acres were irrigated
during the period of the study. Duration of the study was from the begin-
ning of one irrigation season in spring up to the beginning of the next.
The study included obtaining information on water intake and return
flow, based on measurements reported from the three supply sources and nine
principal drains; on area devoted to various classes of crops; and on the
use of fertilizers and pesticides for each crop. It involved field measure-
ment of intake and drain temperature and pH; and collection of water samples
for determination of BOD and COD, ammonia and nitrate nitrogen, phosphate,
chloride, sulfate, bicarbonate, sodium, and potassium ion concentration;
-------
turbidity, total solids and suspended solids, hardness, color, chlorophyll A
and B content, coliform bacteria counts, and chlorinated hydrocarbon pesti-
cides. It also involved interviews with agricultural chemical salespeople,
irrigation district managers, and county extension agents; as well as "library
research" on Census of Agriculture and Bureau of Reclamation reports.
STUDY AREA CHARACTERISTICS
The Wapato Irrigation District covers the flat to very slightly rolling
alluvial-filled valley in the central Yakima Basin, lying on the south and
west of the Yakima River and including the lower parts of the tributary drain-
ages of Toppenish and Satus Creeks. Part of the irrigation water source is
from these two streams, but the major part comes from a large diversion from
the Yakima River. The climate is characterized by scattered light winter and
spring rainstorms, and long, hot, dry summer and fall seasons. Winters are
relatively mild, with some snow at times. Average annual rainfall is about
ten inches, so that irrigation is necessary for most crops.
In 1962 the land use was as follows, according to the Bureau of Recla-
mation statistics, and was not believed to have changed much in 1963.
Pasture 7,000 acres
Farmsteads, roads, ditches 11,000
Not in irrigation rotation 18,000 acres
Fallow, idle, not harvested 16,000 acres
Pasture 23,000
Hay and silage 20,000
Cereal grains 17,000
Field crops (sugar beets, mint, hops) . . . 21,000
Vegetables 11,000
(4,000 multiple-cropped)
Seeds 4,000
Orchard fruits 6,000
In irrigation rotation 118,000 acres
TOTAL 136,000 acres
Intake of water (diversion from the Yakima River and from Toppenish and
Satus Creeks) for use on the irrigated areas averaged about five and one-
quarter feet depth during the six months from April to September, inclusive;
of this, an equivalent of about two feet depth was discharged as return flow
in the drains.
Flow in the intakes; Code name;
New Reservation Canal WAP
Old Reservation Canal (not sampled)
Toppenish Creek TOP
Satus Creek SAT
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and in the return flow drains; Code name;
East Toppenish Drain Eto
McDonald (Sub-drain 35) Mcd
Marion (main) Drain Mar
Toppenish Creek at Indian Church Road Tci
Satus Creek at Highway 3A Sc3
South Drain Sou
Coulee Drain Cou
Satus Drain 302 302
Satus Drain 303 303
was as follows in the 1963 irrigation season April to September, inclusive:
Table 1. Wapato Irrigation Project Flow Data, 1963
;Total tlow by months, M acre-leet
Item April May June July Aug. Sept.
Inflow to project
Outflow from project
I/
77.4
72.2
122
47
.8
.6
127
29
.7
.2
120
32
.9
.1
111
36
.5
.4
84.4
36.6
Difference 5.2 75.2 98.5 88.8 75.1 47.8
_!/ From the four diversions listed above.
2/ From the nine drains listed above.
The sum of the differences for the season is about equal to the irriga-
tion application plus losses from the distribution system. There is no way
to estimate influent or effluent seepage, and there is some inherent error
in the flow measurements, so that it is difficult to strike a close balance.
Precipitation during the irrigation season was slightly heavier than the
normal two-and-a-half inches in the 1963 season, but still was not great
enough to significantly affect soil moisture.
Inflow characteristics were as follows:
Table 2. Wapato Irrigation Project Inflow Water Quality
Average Characteristics for Irrig
Item
Main Canal -'
Toppenish Creek '
Satus Creek _ '
PH
7.0
7.0
7.3
BOD
1.4
0.9
1.0
Hardness
COD (as CaC03)
7.9 42
6.9 47 ,
6.3 47 ±1
Turbidity
4
4
2.5
. Season
Susp.
Solids
16
8
7
Dissolved
Solids
90
120
106
J-/ Diverted from the Yakima River; already somewhat enriched and reused
"second-hand" water.
2^1 Fairly pure mountain runoff little enriched by land use or developments
above the diversion point.
^/ Mountain runoff somewhat enriched by drainage from grazing lands and a
few farmsteads above the diversion point.
l\_l Would have been several points lower except for one very high value of
120 on the last sampling.
-------
The averages do not tell the entire story; the range in intake pH, for
example, was from 6.6 to 8.1, and was slightly higher at the beginning and
end of the season than during the main irrigation period. In similar
fashion, BOD varied from 0.1 to 3.9, with the higher values late in the
season. The 3.9 value -was for the November sample from Satus Creek. The
COD also covered quite a range, from 2.0 to 19.2; but both the high and
low values appeared to be scattered more or less at random over the period
of record. For hardness, the averages are representative; except for the
one high value footnoted in the table, there was little variation, although
there is a tendency toward higher values late in the season. Turbidity
ranged from 1 to 12, apparently a.t random. Total suspended solids ranged
from 0 to 35, again apparently at random. Dissolved solids ranged from 20
to 193, with higher values in middle and late season.
For the drains, the picture is considerably different, as the follow-
ing table shows:
Table 3. Wapato Irrigation Project Drain Water Quality
Item
Average Characteristics for Irrig. Season
Hardness Susp. Dissolved
pH BOD COD (as CaC03) Turbidity Solids Solids
Drain
E . Toppenish
McDonald
Marion
Toppenish Creek
Satus Creek
South
Coulee
Satus 302
Satus 303
6.8
7.1
7.4
7.4
7.4
7.3
7.4
7.8
7.9
2.1
1.8
1.4
1.3
1.2
1.1
1.8
2.0
1.8
8.7
7.6
7.2
8.6
8.1
8.6
10.9
14.8
9.1
105
110
116
123
112
123
182
94
101
10
5
5
6
6
13
12
62
27
24
j 27
' 18
18
40
55
60
'477
' 136
187
195
219
231
225
241
363
226
182
The range in pH for the drains, from 6.8 to 8.4 is the same as the range
for the water sources, and is similar in being high early and late and low in
midseason. The range in BOD, from 0.4 to 5.2,is wider than that for the in-
takes, and shows no pattern. The range in COD, from 3.4 to 24.9, is similar
to that for the intakes, with the high values early in the season. Hardness
of the water in the drains averages three to four times as great as in the
intakes, and is considerably more variable, ranging from an early season low
of 30 to a late season high of 317. Turbidity and suspended solids also were
much higher in the drains, particularly in 302 and 303 at the lower end of
the system where outfall erosion has been observed from time to time. Total
dissolved solids content in the drains represented about double that in the
intakes, was more variable, and showed the same trend of a gradual increase
toward late season.
-------
The units of measurement are the customary ones--logarithm of the
hydrogen ion concentration for pH; milligrams per liter (units of weight
per unit of volume, but in this case practically equivalent to parts per
million) for BOD, COD, hardness, suspended solids, and dissolved solids;
and Hellige turbidimeter units for turbidity. It is not, however, neces-
sary to know the units to make an immediate comparison between conditions
in the intake water and in that in the drains.
Various ions occurred as follows:
Table 4, Wapato Irrigation Project, Principal Non-carbonate Ions
Item
Average Characteristics for Irrigation Season
NHjf NO^ KVCT^ 564^NaT~
Intake
Main Canal
Toppenish Creek
Satus Creek
0.05
0.04
0.04
0.09
0.06
0.441'
0.10
0.17
0.21^/
1.9
0.8
1.2
3.5
0.8
1.0
6.0
6.0
6.3
Drain
E. Toppenish 0.38 1.46 0.66
McDonald 0.06 1.16 0.18
Marion 0.06 0.82 0.24
Toppenish Creek 0.06 0.36 0.24
Satus Creek 0.04 0.45 0.23
South 0.07 0.83 0.30
Coulee 0.08 0.72 0.47
Satus 302 0.11 0.49 0.32
Satus 303 0.07 1.15 0.24
Units of measurement are milligrams per liter.
4
5
4,
5,
5,
4-5,
7.5;
3.0
4.5
6.8
8.0
10.3
11.9
10.8
12.2
53.8ft/
7.5
17.1
11.7
13.0
19.3
23,
19,
22.
50.5;
13.8
16.4
.5
.7
.5
_!/ Average would have been 0.02 except for high readings of 2.00 and 3.06
for which there is no explanation.
2/ Average would have been 0.09 except for one high reading of 1.53 for
which there is no explanation.
_3_/ Includes at least one high value between 10.0 and 26.0.
4/ Includes three readings over 110.0 late in the season.
J5/ Includes three readings between 80.0 and 100.0.
There was a considerable range in NH3 in the drains, from 0 (several
readings in all drains) to a high of 2.65 on one occasion in the East
Toppenish drain; while the intakes showed little variation, with readings
from 0 to 0.14 only. The drains did show an increase to nearly double the
intake values, with some tendency toward higher values early in the season.
-------
For NO., the picture is considerably different. Intake readings were gen-
erally low, from 0 in several instances to a high of 3.06 (but less than 0.30
90 percent of the time), and showed no pattern. Values reported for the drains
averaged several times higher, ranged from 0 (one reading) to 4.06, and showed
a tendency to be higher late in the irrigation season.
The P04 values for intake waters were generally below 0.30, with only two
readings greater. If there was any pattern, it involved a slight decrease from
the beginning of the season. The drains showed a slight increase toward the
end of the season, and averaged about twice as high as the intakes. The range
of values observed was somewhat greater for the drains, 0.05 to 2.25, than for
the intakes.
It is with regard to Cl and SC-A ions that the Yakima River intake shows
its relative enrichment; it has twice the amount of Cl and four times the 864
found in the other two intakes. In the water in the drains, Cl was increased
about three times; and 80^ from two to ten times (excluding three very high
end-of-season readings in Coulee Drain). For neither intakes nor drains did
there appear to be any seasonal pattern nor any wide variation, except as foot-
noted, for Cl or for 804.
Greatest uniformity in intake loading was found with Na; the variation
being within limits of 3.6 to 12.6. The drains average from two to eight times
higher Na content than the intakes, with somewhat less uniformity. No seasonal
trends appear in either.
Certain aspects of enrichment or pollution of the irrigation return flows
showed definite trends with the season, or showed a very wide range of varia-
tion, or are otherwise sufficiently important to be treated in detail. In the
first group is temperature. The temperatures observed during the season are
shown in the table on Page 7.
Through the first half of the season the Wapato intake is warmest; this
is Yakima River water already reused, and previously warmed. In the second
half the Satus Creek intake is warmest; this is a stream with low flow running
through a hot, dry valley above the diversion point. The intakes were warmest
in August and early September. Temperature measurements were made between
9 a.m. and noon in most cases.
The drains warmed up earlier, and showed their highest temperatures from
mid-June to August. The warmest drains were the two lowermost on the system;
these carried the return flow from the warmest of the intakes. If the Wapato
intake temperature is taken as representative of main Yakima River temperature,
the drains are about five degrees centigrade warmer early in the season, six
degrees higher in mid-season, but only about three degrees higher late in the
season. From April through September, the return flows definitely increase
temperatures in the main river over those in the intakes; though what corre-
sponding increase would take place in the main river without diversion is not
known. The maximum observed temperatures were over 25° C on four readings,
reaching 26.5° C in one case, a little more than optimum for the aquatic
habitat.
-------
Table 5. Wapato Irrigation Project, Water Temperature, °C _'
Station
Date
4/15/63
4/24
5/27
6/17
7/1
7/15
8/19
9/9
9/23
10/14
11/12
1/15/64
INTAKES
WAP TOP SAT
7.9 7.6 9.3
8.5 6.5
12.5 10.8 13.0
17.5 12.0 18.0
17.0 12.0 16.0
16.1 11.1 17.8
20.0 14.5 17.0
15.6 15.6 21.2
16.0 14.0 17.0
15.0 11.0 12.0
9.0 14.0
dry 7.0 2.0
DRAINS
Eto Mcd Mar Tci Sc3 Sou Cou 302 303
14.8 14.0 11.7 12.5 9.7 12.5 dry 14.2 13.6
12.0 12.5 11.0 14.0 10.2 ... -
17.0 17.0 15.5 20.0 19.8 18.5 20.5 23.8 22.3
18.0 18.5 19.0 22.5 22.0 22.0 20.0 25.5 26.5
18.0 18.0 18.0 20.0 20.0 20.0 19.0 26.0 22.0
16.7 17.8 17.8 21.1 20.0 21.1 20.0 25.0 22.2
18.0 17.0 18.0 20.0 18.5 20.8 20.0 21.3 21.3
19.0 21.2 20.1 18.4 15.6 21.2
17.0 17.0 17.0 19.0 19.0 19.0 18.0 20.0 20.0
16.0 16.0 15.0 15.0 16.0 16.0 16.0 dry 16.0
13.0 14.0 9.0 10.0 12.0 12.0 11.0 dry dry
11.0 10.0 8.0 2.0 5.0 dry 6.0 dry dry
II To convert: C = 5/9(°F-32), or F = 9/5 °C+32.
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8
Coliform bacteria content of the intakes and drains alike rose to a peak
at mid-season, though the load in the drains was many times greater than in
the intakes. The variation from station to station and time to time was very
great, so that it is difficult to find any pattern. The counts observed are
given in the table on Page 9.
For the second half of the season, both total coliforms and fecal coli-
forms were determined. The peak total coliform count of 2,000,000 was asso-
ciated with a fecal coliform count of 120,000; but a later total count of
250,000 was associated with a fecal count of 125,000. In most cases the ratio
between them was much .greater; but no good correlation is evident. The coli-
form count is not necessarily related to agricultural practices, as some meat-
processing and vegetable-packing plants empty their wastes into the drains.
The picture with respect to pesticides is spotty. Most of the observa-
tions were zero; and the highest was less than 1% parts per billion. Only the
halogenated hydrocarbon pesticides (the more persistent type) were checked;
no attempt was made to analyze for the widely used organic phosphate compounds
such as malathion and parathion and diazinon and toxaphene. Since pesticide
use amounts to from one to three pounds per acre annually, not much appears to
be carried away in the return flow. Occurrence of observations early in the
season indicates that movement of pesticide toxins in return flows follows
soon after application, as most application is early. The table on Page 10
shows results of the sampling and analysis for pesticides.
One odd value is the very early high record for Satus Creek intake on
April 15. This may have been material carried from a forest spray project in
the upper Satus watershed the preceding summer, when 3/4 pound of DDT per acre
was applied to several thousand acres infested with the spruce budworm.
The scattered occurrences noted for pesticide occurrence in the water
samples would lead to the inference that with such infrequent sampling as was
used, much larger "slugs" of pesticide may have been missed. "Accidents"
such as washing spray equipment in irrigation canals, dumping leftover chem-
icals into drains, or drift of spray fog and dust over canals and drains, all
have happened in this area. Any of them could create temporarily a highly
toxic situation in the water as the "slug" of chemical moves through the sys-
tem. However, the observations made are probably indicative of normal., run-
off without any accidental spills.
One other item studied was the occurrence of chlorophyll. Results of
sampling and analyses for chlorophyll are shown in the table on Page 11.
Values observed were high early in the season; low in middle and late
season, though showing a slight rise in August. The early highs may be due
to plant material brought down by snowmelt high flow and by flushing of
canals unused over winter; but the rise in August when the waters are warmest
may have resulted from algal blooms. Early in the season there appeared to
be slightly more chlorophyll A than chlorophyll B; but this situation was re-
versed through the middle of the season. Late in the season there was much
more chlorophyll A than chlorophyll B.
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Table 6. Wapato Irrigation Project, Total Coliform Bacteria in Water Samples
I/
Station
Date
4/15/63
5/27
6/17
7/1
7/15
8/19
9/9
9/23
10/14
11/12
INTAKES
WAP TOP SAT
1,800 50 4
1,260 200 210
6,400 4,500 5,500
2,300 76,000 3,700
10,600 9,100 6,400
22,000 43,000 31,000
21,000 5,700 19,000
200,000 15,000 800
18,000 1,000 800
230 430 11,000
DRAINS
Eto Mcd Mar Tci Sc3 Sou Cou 302 303
130 420 690 680 470 120 dry 10 1,900
13,000 3,900 1,900 70 270 1,600 2,700 4,200 54,000
49,000 - 13,000 35,000 12,000 38,000 85,000 80,000 300,000
280,000 65,000 112,000 120,000 122,000 250,000 93,000 105,000 300,000
82,000 21,000 23,000 46,000 24,000 47,000 180,000 280,000 105,000
150,000 39,000 39,000 120,000 2,000,000 80,000 70,000 160,000 79,000
250,000 17,000 2,800 1,800 2,500 1,200
180,000 16,000 12,000 19,000 5,000 9,000 10,000 - 23,000
24,000 2,500 2,900 3,200 1,600 1,200 5,300 dry 3,500
4,600 930 930 390 930 1,500 .2,400 dry dry
I/ Count per 100 milliliters.
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Table 7. Wapato Irrigation Project, DDT and Other Chlorinated Hydrocarbon
Pesticides Found in Water Samples, in Parts per Trillion
Station
Date
4/15/63
4/24
5/27
6/17
7/1
7/15
8/19
9/9
9/23
10/14
11/12
1/15/64
INTAKES
WAB
50
50
75
0
50
0
0
0
0
X***
0
dry
TOP
0
50
50
0
200
0
0
0
**
x****
0
0
0
SAT
900
50
110
0
T
0
0
0
0
0
0
0
DRAINS
Eto
0
T
150
0
0
50
0
350
x***
70***
0
x***
Mcd
0
T
175
0
T
100
0
0
0
0
0
0
Mar
-
T
110
0
170
0
0
T
0
0
0
x**
Tci
0
120
80
0
100
0
0
0
0
0
-
0
Sc3
0
T
120
0
0
0
0
0
x****
0
-
0
Sou
0
120
40
0
0
0
57
0
x**
0
-
dry
Cou
dry
-
40
0
50
0
55
0
0
0
0
0
302 303
0 0
80 100
40 40
,740**
^700 U
400 140
1,400** T
45 0
-
x** o
dry X
dry dry
dry dry
* Aldrin
** Dieldrin
*** Heptachlor
**** Chlordane
-------
Table 8. Wapato Irrigation Project,. Chlorophyll A .and B Content of
Water Samples in Milligrams per Cubic Meter
Station
Date
4/15/63
4/24
5/27
6/17
7/1
7/15
8/19
9/9
9/23
10/14
11/12
1/15/64
INTAKES
WAP TOP
19.3 2
-
5.1 1
7 3
0.28 0
1 0
20 . 28 0
2.65 1
3.97 0
5.73 0
-
-
.0
-
.8
.4
.14
.36
.84
.36
.91
-
-
SAT
45
1
4
0
0
14
2
0
1
.2
-
.8
.14
.65
.98
.65
.54
.46
-
-
DRAINS . .
Eto
-
-
6.3
4
2
1.29
24.18
2.39
0.36
2.21
-
-
Mcd
14.6
-
5.1
7
2.78
0.65
20.16
1.84
1.26
2.57
-
-
Mar
14.6
-
3.6
7
8.46
1.20
25.33
2.26
4.14
4.37
-
-
Tci
18.6
-
1.8
7
14.97
1.65
13.24
3.05
5.46
3.97
-
-
Sc3
39.2
-
5.1
15
6.27
2.01
34.54
-
5.40
7.39
-
-
Sou
11.3
-
10.4
7
-
1.20
5.18
0.92
2.65
6.94
-
-
Cou 302 . 303
dry 7.9 24.4
_
5.1 12.6 6.3
- 12 7
1.91 6.69 8.14
3.79 4.39 1
8.06 8.06 20.16
_
2.13 2.24 2.93
13.48 dry 8.20
_
.
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12
CONCLUSIONS
Though the water returned to the river from the irrigated land of the
Wapato project is greatly enriched compared to its quality incoming, the
enrichment does not amount to a severe degradation of water quality. The
principal degradation relates to increases in coliform bacteria, though
the high-count occurrences were random and irregular and were not corre-
lated with any observed condition. Somewhat the same situation holds for
pesticides; a few samples with high enough toxic content to be dangerous
to some forms of aquatic insects were collected, but the highest concentra-
tion found was only one and a half parts per billion. This is not believed
to present a hazard to livestock or to people. However, as noted, with
such infrequent sampling it is very probable that much higher concentra-
tions were missed; the only cause for joy lies in the fact that most of
the observations showed zero pesticide content.
RECOMMENDATIONS
The difficulty in getting accurate measurements of water, in establish-
ing a "water balance" for the project area, and in determining the actual
water use by the crops as separate from the various losses, all point to the
need for development of improved measuring systems. This is, however, some-
what outside the scope of the present study and report.
Despite the competition for markets and for water to grow the crops to
send to the markets, there undoubtedly are various ways in which water use
can be made more efficient both in terms of volume and quality of crop pro-
duction and in terms of water loss or wastage. Changes in timing and amount
of each irrigation application, and in methods of application, may result
both in improved crop yield and in reduction of total water use.
Contracts between processors and growers specify method and timing of
various cultural operations, including fertilization, irrigation, and pesti-
cide application. These specifications comprise a rather tight system of
control; as they are accepted by more and more farmers, they lower the haz-
ard to water resources from incidental contamination either by excess nutri-
ents or by toxins. But a continuing educational effortand safety campaign--
are needed to prevent the accidental contamination from spills, thoughtless
washing of spray equipment in drains, etc.
Bacterial contamination is a different matter. Where it is due to waste
discharge from meat packing plants, it can be reduced by lagooning wastes
until the period of biological degradation is over before release of effluent
to the drains. But where it is due to ground-water movement from septic tank
disposal fields on the individual farms, not much improvement can be gained
until a complete sewage system for the entire irrigation district can be in-
stalled. This is exceedingly unlikely in the foreseeable future.
-------
APPENDIX
LABORATORY ANALYSES
Summary
Table 1. Sampling Points
Table 2. Tabulations of Data from Laboratory Analyses
-------
SUMMARY
The individual results presented in Table 2 leave very little
from which to draw conclusions. The variations between stations and
also the variations within the same station throughout the year can be
expected. From the data, the following conclusions can be drawn:
1. The month of April shows a consistently higher algal growth
as indicated by the concentration of chlorophyll A and B found. Some
evidence of a secondary algal growth is shown in September 1963 in
stations Cou and below. In April, the N03 and P04 concentrations are
also low, which might be contributory to the high algal growth. How-
ever, it will be noted that during September these low concentrations
of N03 and P04 do not hold for all stations.
2. The maximum BOD found of 5.2 mg/1 occurred at station Cou on
April 24. On this date, the maximum COD of 24.9 was also obtained. As
will be noted, in the previous sampling period on April 15, no water was
flowing in this drain. It is likely, therefore, that the high results
obtained on the 24th were due to the flushing action of the irrigation
return flow. This is the only sampling point on this drain which combines
with the South Coulee drain before entering the Yakima River. It should
be pointed out that a BOD of 5.2 mg/1 (the highest obtained) would be
considered good according to Eastern standards. Nevertheless, this must
be considered as high in the Columbia River Basin system; but, if flush-
ing was the cause, then the results can be ignored since the dilution in
the Yakima River should be able to handle this load. The remainder of
the BOD values obtained at the other stations and at this station through-
out the remainder of the sampling period show no significant domestic
filtration.
Of the approximately 150 BOD values obtained, only six showed a BOD
of 3.0 and higher. These six values were scattered among the various
sampling stations over the period, April 24 to November 11. This again
indicates a lack of severity of domestic pollution.
3. It will be noted that the NOg and PO^ values are higher in
summer. This can be accounted for by the wash-off of fertilizers and the
natural decomposition of organic material which would account, especially,
for the high nitrate values.
In summary, it may be stated that, as far as the results obtained from
the Wapato project are concerned, there does not appear to be any cause
for alarm from irrigation return water.
-------
TABLE 1
SAMPLING POINTS
Code Description
WAP Wapato Irrigation Canal at State Hwy. 3A just below the
point of diversion from the Yakima R,iver
TOP Toppenish Creek near White Swan above the major diversions
SAT Satus Creek at lowermost U.S. Hwy. 97 bridge
Eto East Toppenish Drain at Parton Road
Mcd McDonald Drain (Sub-Drain 35) at Parton Road
Mar Marion (Main) Drain at Indian Church Road
Tci Toppenish Creek at Indian Church Road
Sc3 Satus Creek at State Hwy. 3A
Sou South Drain at State Hwy. 3A
Cou Coulee Drain (North Satus Road)
302 Drain 302 (State Hwy. 3A)
303 Drain 303 (Looney Road)
-------
LEGEND
Intakes: WAP,TOP,SAT
Drains: Eto.McD, Mar,
Cou,Sou,Sc3,
302 S 303
x= Sampling Point
MAIN WAPATO
DIVERSION
Brownsrown
3028303
onHwy 3A,
above Mabton
-------
TABLE 2
TABULATIONS OF DATA FROM LABORATORY ANALYSES
Footnotes
* mg/1
** There is a J mark between Sou and Cou, which may indicate
that these stations are reversed.
# count/100 ml
Pesticides - nil - method's sensitivity around 50 ppt.
nil to trace - slight indication but too low to
be certain or measured.
possible trace - often found to be nil after re-
peated analysis with column
purification. Also, often not
enough sample to repeat analysis.
BOD reading for 11/12/63 is for 7-day instead of usual 5-day
period.
Indicates no test was run, usually due to:
(1) No water
(2) Lack of sufficient sample
(3) Sample lost in transit
(4) Sample not collected
(5) Bacteriological samples run by Washington State
Pollution Control Commission
(6) Bacteriological samples shipped to Portland but were
more than 24 hours old.
-------
WAPATO IRRIGATION DISTRICT
Station Code: WAP
Sample
Date
4/15/63
4/24/63
5/27/63
6/17/63
7/1/63
7/15/63
8/19/63
9/9/63
9/23/63
10/14/63
11/12/63
1/15/64
Minimum
Maximum
Average
Sample
Date
4/16/63
4/24/63
5/27/63
6/17/63
7/1/63
7/15/63
8/19/63
9/9/63
9/23/63
10/14/63
Temp.
pH °C
6.6 7.9
7.3 8.5
12.5
6.9 17.5
6.8 17.0
7.0 16.1
7.2 20.0
7.2 15.6
6.8 16.0
7.6 15.0
Sample lost
No water -
6.6 7.9
7.6 20.0
7.0
BOD* COD*
1.8 10.4
1.5 8.5
0.5 6.7
1.2 16.3
1.4 2.4
1.8 7.0
1.1 6.7
2.4 3.3
nil 14.9
1.8 5.8
in transit
- -
nil 2.4
2.4 16.3
1.4 8.2
NEU*
*~~
-
0.10
0.13
-
0.04
0.02
nil
0.08
nil
nil
-
nil
0.13
0.04
NO*,*
3
0.06
0.03
0.04
nil
0.26
0.06
0.10
0.22
0.06
0.10
-
nil
0.26
0.09
Sol.
PC.*
4
0.07
0.07
0.19
0.05
0.07
0.07
0.07
0.11
0.09
0.18
-
0.05
0.19
0.10
Cl*
2.0
1.4
1.0
2.0
2.0
1.7
1.6
2.2
1.9
2.9
-
-
1.4
2.9
1.9
Pesticides
Color HC03*
-
5
-
5
5
5
5
10
10
DDT
nil
trace
75 ppt
nil
50 ppt
nil
nil
nil
nil
nil
may be
Other
nil
nil
nil
nil
nil
nil
nil
nil
nil
trace
Hepta-
0
0
0
0
0
0
0
0
0
S04*
4.0
nil
3.0
4.0
4.0
3.5
2.3
3.3
5.2
5.6
-
-
nil
5.6
3.5
Turb.
..
6.0
5.0
4.0
5.0
8.0
3.5
4.0
1.0
4.5
2.0
-
-
1.0
8.0
4.1
Na*
5.9
5.7
3.6
4.9
5.5
7.6
5.5
7.2
-
8.2
-
-
3.6
8.2
5.5
Chlorophyll*
A
^
.33 0
.06 0
.001 0
.0001 0
.00055 0
.00714 0
.00122 0
.00282 0
.00474 0
B
.05
.04
.006
.00018
.00045
.01301
.00143
.00115
.00099
Total
0.3C
0.10
0.007
0.00028
0.001
0.02028
0 ,00265
0.00397
0.00573
Bard-
Solids*
IC* ness* Total Susp
- ' 44
36
26
36
1.3 38
1.0 40
1.3 42
1.5 48
53
2.0 61
-
-
1.0 26
2.0 61
1.0 42
94 35
109 5
20 26
70 22
80 10
108 8
132 24
82 24
108 14
100 6
-
-
20 5
132 35
90 17
Coliforms#
Total
1,800
-
1,260
6,400
2,300
10,600
22,000
21,000
200,000
18,000
Fecal
-
-
-
-
'
900
6,500
-
2,000
chlor & Heptachlor-
ep oxide
11/12/63
1/15/64
Minimum
Maximum
Average
Sample lost
No water
5
10
6
in transit
-
nil
75 ppt
trace
-
-
nil
0
0
0
-
-
.0001 0
.33 0
.04528 0
-
-
.00018
.05
.01257
-
-
0.001
0.38
0.05787
-
-
1,260
200,000
31,484
-
-
900
6,500
3,133
-------
WAPATO IRRIGATION DISTRICT
Station Code: TOP
TABLE 2 - Page 2
Sample
Date
4/15/63
4/24/63
5/27/63
6/17/63
7/1/63
7/15/63
8/19/63
9/9/63
9/23/63
10/14/63
11/12/63
1/15/64
Minimum
Maximum
Average
Sample
Date
4/15/63
4/24/63
5/27/63
6/17/63
7/1/63
7/15/63
8/19/63
9/9/63
9/23/63
£H
8.1
6.9
-
6.8
6.8
6.8
7.0
6.8
6.8
6.8
-
-
6.8
8.1
7.0
Temp .
°C
7.6
6.5
10.8
12.0
12.0
11.1
14.5
15.6
14.0
11.0
9.0
7.0
6.5
15.6
BOD* COD*
0.5 8.
0.3 7.
0.1 4.
1.4 19.
0.9 4.
1.2 3.
0.8 6.
1.4 4.
1.4 9.
1.0 4.
0.8 5.
0.4 3.
0.1 3.
1.4 19.
0.9 6.
5
5
2
2
4
7
3
9
9
4
3
0
0
2
7
NH * NO *
3~ 3~
0.11 0.05
0.12 nil
0.06 nil
nil nil
0.02 0.01
nil 0.05
0.08 0.54
0.05 nil
nil 0.04
0.02 0.04
0.04 0.01
0.03 nil
nil nil
0.12 0.54
0.04 0.06
Sol.
PO *
4
0.12
0.12
0.79
0.10
0.11
0.12
0.16
0.08
0.10
0.16
0.08
0.08
0.08
0.79
0.16
Pesticides
Color
-
-
5
-
(5-0)
5
10
5
10
HCO *
o
-
-
-
-
-
-
-
-
-
DDT
nil
trace
<50 ppt
nil
200 ppt
nil
nil
nil
nil
Other
nil
nil
nil
nil
nil
nil
nil
nil
possible trace
Cl* SO * Turb.
4
1.0 nil 5.0
0.6 nil 3.0
0.5 1.5 1.0
2.1 nil 1.0
0.7 nil 2.0
0.6 2.3 1.5
0.8 0.4 2.5
0.7 0.7 5.5
0.5 1.1 11.5
0.5 2.0 5.0
1.2 nil 1.0
0.2 1.2 3.0
0.2 nil 1.0
2.1 2.3 11.5
0.8 0.8 3.4
Chlorophyll*
A B
-
0.02 0.02
0.04 nil
0.0004 0.003
0.00011 0.00007
0.00023 0.00014
nil nil
0.00093 0.00091
0.00036 nil
Na* K*
4.1
4.1
5.2 -
5.6
5.5 1.8
9.0 2.1
6.5 2.5
7.5 2.6
-
5.5 2.2
6.2 1.6
6.2 2.2
4.1 1.6
9.0 2.6
5.5 1.3
Hard-
Solids*
ness* Total
47
40
44
41
40
46
52
52
51
52
50
46
40
52
47
99
104
98
102
101
161
162
147
152
95
112
95
162
120
Susp
23
nil
6
nil
13
1
10
1
27
9
nil
3
nil
27
8
Coliforms#
Total
-
0.04
0.04
0.0034
0.00014
0.00036
nil
0.00184
0.00036
Total
50
-
200
4,500
76,000
9,100
43:,.000
5,700
15,000
Fecal
1
-
-
-
-
-
-
230
,800
380
Chlordane & Dieldrin
10/14/63
11/12/63
1/15/64
Minimum
Maximum
Average
15
25
-
(5-0)
25
10
-
-
61
61
61
nil
nil
nil
nil
200 ppt
nil
nil
nil
nil
possible trace
0.00057 0.00034
-
-
nil nil
0.04 0.02
0.00695 0.00271
0.00091
-
-
nil
0.04
0.00966
1,000
-
-
50.,
. 76,000
17,172
1
340
-
-
230
,800
688
-------
WAPATO IRRIGATION DISTRICT
Station Code: SAT
TABLE 2 - Page 3
Sample
Date
4/15/63
4/24/63
5/27/63
6/17/63
7/1/63
7/15/63
8/19/63
9/9763
9/23/63
10/14/63
11/12/63
1/15/64
Minimum
Maximum
Average
Sample
Date
4/15/63
4/24/63
5/27/63
6/17/63
7/1/63
7/15/63
8/19/63
9/9/63
9/23/63
10/14/63
11/12/63
1/15/64
Minimum
Maximum
Average
fiS
8.1
-
-
6.8
7.2
7.0
7.2
7.0
7.2
7.8
-
-
6.8
8.1
7.3
Temp.
°C
9.3
-
13.0
18.0
16.0
17.8
17.0
21.2
17.0
12.0
14.0
2.0
2.0
21.2
BOD*
0.7
0.7
0.7
0.8
0.8
1.1
0.4
1.8
0.5
1.0
3.9
0.2
0.2
3.9
1.1
COD* NHs*.
9.8
6.2
6.3
18.1
0.8
5.8
6.7
4.4
7.0
4.3
6.7
2.0
0.8
18.1
6.5
0.08
0.14
0.14
0.03
nil
0.01
0.01
0.04
nil
0.01
0.01
0.03
nil
0.14
0.04
N0.3*
0.05
nil
0.01
nil
0.03
0.05
3.06
nil
0.02
0.02
2.00
nil
nil
3.06
0.44
Pesticides
Color
-
5
-
5
15
20
15
15
$0
20
< 5
< 5
20
13
HCOo*.
-
-
-
-
-
-
-
-
-
-
57
57
57
DDT
0.9 ppb
trace
110 ppt
nil
trace
nil
nil
nil
nil
nil
nil
nil
nil
110 ppt
.
.
Other
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
Sol.
PO/,* Cl*
0.08 1.0
0.13 0.7
0.24 0.6
0.08 0.9
0.06 0.7
0.10 0.7
0.02 0.8
0.06 0.9
0.05 0.7
0.11 0.9
1.53 4.6
0.02 2.3
0.02 0.7
1.53 4.6
0.21 1.2
Hard- Solids*
SO/,* Turb . Na*
nil
nil
nil
0.5
nil
nil
0.3
0.5
0.4
1.0
7.0
2.1
nil
7.0
1.0
6.0 3.7
7.0 4.5
2.0 3.8
1.0 5.4
1.0 4.9
1.0 8.4
1.5 6.5
1.0 7.4
1.0
1.5 6.0
4.0 12.6
1.0 6.4
1.0 3.7
7.0 12.6
2.3 6.3
Chlorophyll*
A
- -
0.32
0.04
0.001
0.00005
0.00032
0.00390
0.00122
0.00054
0.00101
-
B
-
0.57
nil
0.002
0.00009
0.00032
0.01109
0.00143
nil
0.00045
-
Total
-
0.89
0.02
0.004
0.00014
0.00065
0.01498
0.00265
0.00054
0.00146
-
K* ness* Total Susp.
35 88
34 94
26 68
35 88
1.2 36 92
1.5 41 138
1.5 47 137
2.1 50 106
46 94
1.3 48 88
2.9 120 193
1.7 46 94
1.2 26 68
2.9 120 193
1.4 47 107
19
nil
12
nil
nil
nil
15
12
nil
3
nil
nil
nil
19
5
Coliforms#
Total
<4
-
210
5,500
3,700
6,400
31,000
19,000
800
800
-
Fecal
. _
-
-
-
-
-
690
300
160
40
trace - unknown -
nil
trace - unknown
0.00005
0.32
0.04089
nil
0.57
0.06504
0.00014
0.89
0.10382
210
31,000
7,490
40
690
298
-------
WAPATO IRRIGATION DISTRICT
Station Code: Eto
TABLE 2 - Page 4
Sample
Date
4/15/63
4/24/63
5/27/63
6/17/63
7/1/63
7/15/63
8/19/63
9/9/63
9/23/63
10/14/63
11/12/63
1/15/64
Minimum
Maximum
Average
Sample
Date
4/15/63
4/24/63
5/27/63
6/17/63
7/1/63
7/15/63
8/19/63
9/9/63
9/23/63
10/14/63
11/12/63
1/15/64
Minimum
Maximum
Average
pH
7.9
7.0
-
6.8
6.8
6.8
6.8
6.8
6.8
7.2
-
-
6.8
7.9
7.0
Temp.
°C
14.8
12.0
17.0
18.0
18.0
16.7
18.0
19.0
17.0
16.0
13.0
11.0
11.0
19.0
BOD* COD*
2.8 10.6
2.4 10.0
1.1 9.7
1.9 20.2
2.0 5.2
2.0 8.0
3.0 9.0
7.6
2.5 7.1
1.6 5.2
1.6 4.5
2.1 7.0
1.1 4.5
3.0 20.2
1.0 8.7
Sol.
NHo* NOo* PO/.*
0.75 -
0.07 0.56 0.42
0.45 . 1.10 0.71
0.24 0.86 0.54
0.23 1.22 0.43
0.17 1.30 0.34
nil 4.06 0.36
2.65 1.31 0.72
nil 1.43 0.41
nil 1.54 0.96
0.01 1.66 0.14
0.02 1.07 2.25
nil 0.56 0.14
2.65 4.06 2.25
0.38 1.46 0.66
Hard-
Cl*
4.0
3.0
3.4
4.2
3.5
3.7
4.5
-
4.3
4.8
6.2
5.1
3.0
6.2
4.2
SO/,*
2.0
7.0
7.5
6.0
6.0
5.2
6.1
7.1
8.3
11.0
8.6
2.0
11.0
6.8
Pesticides
Color 1
.
-
5
-.
10
nil
5
10
10
10
20
<5
nil
20
7
ICO£
.
-
-
-
_
-
-
-
-
-
-
130
130
130
-
DDT
nil
trace
150 ppt.
nil
nil
about 50 ppt.
nil
350 ppt.
nil
nil
nil
nil
nil
350 ppt.
-
Other
nil
nil
nil
nil
nil
nil
nil
nil
trace Heptachlor
indicated
60-80 ppt. Heptachlor
indicated
nil
trace Heptachlor
indicated
nil
trace indicated
-
A
.
-
0.10
0.001
0.0007
0.00065
0.00859
0.00121
0.00036
0.00177
-
-
0.00036
0.1
0.01428
Turb . Na*
7.0 8.7
11.0 10.8
9.0 11.6
10.0 10.4
7.5 12.9
4.0 12.2
3.5 13.2
40.0
5.0 11.2
7.5 11.7
3.0 14.2
3.0 8.7
40.0 14.2
9.8 11.7
Chlorophyll*
B
_
0.03
0.003
0.0013
0.00064
0.01561
0.00118
nil
0.00044
-
-
nil
0.03
0.00652
K*
-
-
-
2.5
2.3
2.8
2.5
-
2.6
2.8
3.1
2.3
3.1
2.7
ness*
119
85
94
88
92
94
111
117
111
113
123
117
85
123
105
Solids*
Total Susp.
143
166
164
180
203
218
196
188
184
223
192
143
223
187
1
48
24
28
41
48
32
6
11
23
nil
nil
48
24
Coliforms#
Total
_
0.13
0.004
0.002
0.00129
0.02418
0.00239
0.00036
0.00221
-
-
0.00036
0.13
0.0208
Total
_
13,
49,
280,
82,
150,
250,
180,
24,
-
-
280,
114,
130
000
000
000
000
000
000
000
000
130
000
237
Fecal
_
-
-
-
-
-
60,000
125,000
67,000
8,000
-
-
8,000
125,000
65,000
-------
WAPATO IRRIGATION DISTRICT
Station Code: McD
TABLE 2- - Page 5
Sample
Date pH
4/15/63 8.1
4/24/63 7.0
5/27/63
6/17/63 6.8
7/1/63 7.0
7/15/63 7.0
8/19/63 7.0
9/9/63 7.0
9/23/63 7.0
10/14/63 7.3
11/12/63 -
1/15/64
Minimum 6 . 8
Maximum 8 .. 1
Average 7.2
Sample
Date Color
4/15/63 -
4/24/63 -
5/27/63 <5
6/17/63 -
7/1/63 10
7/15/63 15
8/19/63 10
9/9/63 10
9/23/63 10
10/14/63 10
11/12/63 15
1/15/64 <5
Minimum ^5
Maximum 15
Average 10
Temp.
°C
14.0
12.5
17.0
18.5
18.0
17.8
17.0
21.2
17.0
16.0
14.0
10.0
10.0
21.2
BOD*
1.3
1.3
1.5
2.4
1.8
1.6
2.0
1.7
2.8
0.9
3.5
0.8
0.8
3.5
1.8
COD*
9.6
9.4
9.7
22.4
4.2
5.3
6.2
3.9
6.9
3.9
3.6
6.0
3.6
22.4
7.6
NH *
j
0.18
0.07
0.19
0.03
0.01
0.02
nil
0.07
0.02
0.10
nil
0.02
nil
0.19
0.05
NO*
j
0.82
0.63
0.91
0.72
1.42
1.24
1.86
0.98
1.02
1.29
1.72
1.31
0.63
1.72
1.16
Pesticides
HCOo*
-
-
-
- nil
-
-
-
-
-
-
123
123
123
-
DDT
nil
trace
175 ppt
nil
to trace
100 ppt
nil
nil
nil
nil
nil
nil
nil
175 ppt
--
Other
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
-
Sol.
PO,* Cl*
H
0.08 5.0
0.05 4.9
0.24 5.5
0.22 15.2
0.24 3.8
0.30 5.7
0.14 5.8
0.05 2.6
0.27 5.4
0.18 4.9
0.35 3.6
0.05 6.5
0.05 2.6
0.35 15.2
0.18 5.7
SO *
4
8.0
3.0
9.0
8.5
8.0
7.5
6.7
7.4
8.4
8.3
10.0
10.7
3.0
10.7
8.0
Turb . Na*
5.0 9.8
3.0 10.4
4.0 Ml. 6
5.0 17.6
8.0 11.5
8.0 15.5
9.0 12.2
2.0 13.8
1.0
3.6 10.4
4.0 17.0
6.0 12.9
1.0 9.8
9.0 17.6
4.9 13.0
Chlorophyll*
A
_
0.18
0.06
0.001
0.00128
0.00033
0.00714
0.00093
0.00101
0.0019
-
-
0.00033
0.18
0.02817
B
_
0.11
0.04
0.006
0.0015
0.00032
0.01301
0.00091
0.00025
0.00067
-
-
0.00025
0.11
0.01918
Total
_
0.29
0.1
0.007
0.00278
0.00065
0.02016
0.00184
0.00126
0.00257
-
-
0.00065
0.29
0.04736
Bard-
IC* ness*
100
96
100
102
2.8 104
3.2 109
3.1 113
2.9 114
115
2.6 112
3.9 136
2.8 123
2.6 96
3.9 136
3.0 110
Solids*
Total £
162
141
182
199
194
229
198
197
194
184
226
230
141
230
195
msp.
51
83
26
17
10
25
28
23
12
9
8
27
8
83
27
Colif orms#
Total
420
_
3,900
sample lost
65,000
21,000
39,000
17,000
16,000
2,500
-
-
420
65,000
20,602
Fecal
_
_
-
-
-
-
25,000
3,800
2,700
870
-
-
870
25,000
8,093
-------
WAPATO IRRIGATION DISTRICT
Station Code: Mar
TABLE 2 - Page 6
Sample
Date
4/15/63
4/24/63
5/27/63
6/17/63
7/1/63
7/15/63
8/19/63
9/9/63
9/23/63
10/14/63
11/12/63
1/15/64
Minimum
Maximum
Average
Sample
Date
4/15/63
4/24/63
5/27/63:
6/17/63
7/1/63
7/15/63
8/19/63
9/9/63
9/23/63
10/14/63
11/12/63
1/15/64
Minimum
Maximum
Average
El
8.1
7.1
-
7.4
7.4
7.2
7.'2
7.2
7.2
7.7
-
-
7.1
8'. 1
7.4
Temp.
°C
11.7
11.0
15.5
19.0
18.0
17.8
18.0
20.1
17.0
15.0
9.0
8.0
8.0
20.1
BOD* COD*
1.8 8.6
1.2 8.8
0.8 4.0
1.3 13.0
1.7 4.6
1.3 3.9
1.2 3.8
2.7 3.4
1.5 5.8
0.8 5.6
1.0 20.3
1.1 5.0
0.8 3.4
2.7 20.3
1.4 7.2
NH *
3
0.14
0.06
0.14
0.03
nil
0.04
0.07
0.11
0.03
nil
0.02
0.02
nil
0.14
0.05
NO *
3
0.42
0.40
0.86
0.47
1.00
0.90
1.30
0.90
0.96
1.22
0.12
1.32
0.12
1.32
0.82
Sol.
PO *
4
0.15
0.06
0.27
0.24
0.23
0.21
0.19
0.21
0.26
0.27
0.52
0.24
0.06
0.52
0.23
Pesticides
Color
-
-
<5
-
10
10
10
15
10
10
60
<5
^ 5
60
15
HCO *
j
-
-
-
-
-
-
-
-
-
-
-
152
152
152
-
DDT
-
trace
110 ppt
nil
170 ppt
nil
nil
nil to trace
nil
nil
nil
nil
nil
170 ppt
Other
-
nil
nil
nil
nil
nil
nil
nil
nil
nil
nil
trace of
or
Cl* SO *
4
3.0 7.5
3.0 2.0
3.0 11.0
2.9 8.3
2.9 8.0
3.4 6.0
3.1 5.8
1.6 6.8
2.3 7.0
3.2 9.2
18.4 40.0
3.8 12.0
1.6 2.0
18.4 40.0
4.2 10.3
Turb.
4.0
5.0
4.0
3.0
10.0
4.0
5.5
2.5
2.5
2.7
9.0
6.0
2.5
10.0
4.7
Na* K*
12.1
13.4 -
15.4
16.8 -
14.5 3.2
17.4 3.4
15.6 3.6
18.7 3.7
-
15.3 3.6
52.5 6vl
20.3 4.0
12.1 3.2
52.5 6.1
19.3 3.9
Chlorophyll*
A
-
0.18
0.06
0.001
0.0035
0.00053
0.0104
0.00121
0.00358
0.00389
-
B
-
0.11
nil
0.006
0.00496
0.00068
0.01561
0.00106
0.00056
0.00048
-
Total
-
0.29
0.04
0.007
0.0084
0.0012
0.02533
0.00226
0.00414
0.00437
-
Hard- Solids*
ness* Total Susp.
85 158
81 168
93 186
100 172
112 186
103 239
118 211
117 209
111 218
121 206
224 425
131 250
85 158
224 425
100 219
Coliforms#
Total Fecal
690
-
1,900
13,000
112,000
23,000
39,000 2,800
2,800 1,300
12,000 500
2,900 530
-
28
8
14
14
30
9
15
21
20
11
18
33
8
33
18
Dieldrin -
foreign matter
nil
trace
0.00053
0.18
0.02934
0.00056
0.11
0.01548
0.0012
0.29
0.4252
690 500
112,000 2,800
2,303 1,283
-------
WAPATO IRRIGATION DISTRICT
Station Code: Tci
TABLE 2 - Page 7
Sample
Date
4/15/63
4/24/63
5/27/63
6/17/63
7/1/63
7/15/63
8/19/63
9/9/63
9/23/63
10/14/63
11/12/63
1/15/64
Minimum
Maximum
Average
Sample
Date
4/15/63
4/24/63
5/27/63
6/17/63
7/1/63
7/15/63
8/19/63
9/9/63
9/23/63
El
8.2
7.2
-
7.0
7.6
7.2
7.2
7.2
7.2
7.7
-
-
7.0
8.2
7.4
Temp.
°C
12.5
14.0
20.0
22.5
20.0
21.1
20.0
18.4
19.0
15.0
10.0
2.0
2.0
22.5
BOD* COP*
1.2 12.5
2.1 14.8
0.9 5.9
1-4 14.3
2.6 7.4
2.0 6.6
1.4 6.5
1.4 4.9
0.6 6.2
1.2 6.4
Sample lost
1.1 9.0
0.6 4.9
2.6 14.8
1.4 8.6
NH * NO *
0.14 0.10
0.10 0.04
0.14 0.37
0.05 0.17
nil 0.29
0.03 0.21
0.02 0.35
0.05 0.52
0.01 0.75
0.04 0.91
in transit
0.04 0.29
nil 0.04
0.14 0.91
0.05 0.36
Sol.
PQ *
4-
0.25
0.26
0.29
0.32
0.18
0.20
0.16
0.14
0.25
0.33
-
0.41
0.14
0.41
0.25
Pesticides
Color
-
-
5
-
15
15
15
10
10
HCO *
3
-
-
-
-
DDT
nil
trace
^100 ppt
nil
Other
nil
nil
nil
nil
100 ppt or less nil
-
-
-
-
nil
nil
nil
nil
nil
nil
nil
possible trace
Cl* SO,*
4
4.0 8.0
5.2 4.0
4.6 12.0
5.5 13.0
5.3 11.0
6.2 10.0
5.5 9.3
2.3 9.0
3.1 7.7
4.6 11.7
-
13.8 32.8
2.3 4.0
13.8 32.8
5.5 11.7
Turb.
6.0
7.0
3.0
8.0
7.0
4.0
7.5
2.5
5.5
5.0
-
12.0
2.5
12.0
5.0
Na* K*
12.1
19.8
20.0
23.2
19.9 3.0
26.9 3.9
23.9 4.1
23.9 3.8
-
20.3 3.8
-
45.0 4.5
12.1 3.0
45.0 4.5
23.5 3.9
Chlorophyll*
A
-
0.17
0.04
0.001
0.00585
0.00088
0.0061
0.00136
0.00419
B
-
0.2
nil
0.006
0.00913
0.00077
0.00714
0.00169
0.00127
Total
-
0.37
0.02
0.007
0.01497
0.00165
0.01324
0.00305
0.00546
Hard-
Solids*
ness* Total
85
96
107
114
104
120
132
128
115
160
-
182
85
182
122
172
190
193
213
207
263
250
238
208
232
-
370
172
370
176
Susp.
26
8
9
13
11
7
30
24
26
13
-
28
7
30
18
Colif orms#
Total
680
-
70
35,000
120,000
46,000
120,000
1,800
19,000
Fecal
40,
1,
2,
-
-
-
-
-
-
000
000
400
or interference
10/14/63
11/12/63
1/15/64
Minimum
Maximum
Average
15
-
Sample lost
-
5
15
12
218
218
218
-
nil
in transit
nil
nil
<100 ppt
-
nil
-
nil
nil
possible trace
-
0.00326
-
-
0.00088
0.17
0.02584
0.00071
-
-
0.00071
0.02
0.02519
0.00397
-
-
0.00165
0.37
0.04881
3,200
-
-
70
120,000
38,417
40,
10,
440
-
-
440
000
960
-------
WAPATO IRRIGATION DISTRICT
Station Code: Sc3
TABLE 2 - Page 8
Sample
Date
4/15/63
4/24/63
5/27/63
6/17/63
7/1/63
7/15/63
8/19/63
9/9/63
9/23/63
10/14/63
11/12/63
1/15/64
Minimum
Maximum
Average
Sample
Jfl
8.3
7.0
-
7.0
7.6
7.2
7.2
7.0
7.2
7.9
.
-
7.0
8.3
7.4
Temp.
°C
9.7
10.3
19.8
22.0
20.0
20.0
18.5
15.6
19.0
16.0
12.0
5.0
5.0
22.0
BOD* COD*
0.8 12.6
0.4 7.4
1.5 7.4
2.0 17.9
1.4 4.4
1.1 4.9
1.0 8.0
1.6 5.2
1.6 9.8
0.9 7.4
Sample lost
0.7 4.0
0.4 4.0
2.0 17.9
1.2 8.1
NH-* NO.*
"^^^^r " ^^^^^
0.06 0.02
0.08 0.01
0..11 0.22
0.09
nil 0.85
nil 0.63
nil 1.15
0.06 0.56
nil 0.61
0.07 0.46
in transit
0.02 0.33
nil 0.01
0.11 1.15
0.04 0.45
Sol.
PO^*
0.08
0.15
0.29
0.20
0.22
0.27
0.30
0.29
0.35
-
0.18
0.08
0.30
0.23
Pesticides
Date Color HCO^
4/15/63
4/24/63
5/27/63
6/17/63
7/1/63
7/15/63
8/19/63
9/9/63
9/23/63
10/14/63
11/12/63
1/15/64
Minimum
Maximum
Average
.
-
5
-
15
10
15
- '
15
15
Sample
-
5
15
13
j
-
-
-
-
-
-
-
-
...
lost
148
148
143
-
DDT
nil
trace
120 ppt
nil
nil
nil
nil
nil
nil
nil
in transit
nil
nil
120 ppt
-
Other
nil
nil
nil '
nil
nil
nil
nil
nil
Cl*
1.0
1.6
10.4
4.8
5.1
5.5
6.0
2.8
4.8
7.6
-
5.9
1.0
10.4
5.5
SO^*
nil
nil
22.0
9.0
11.0
10.0
11.2
-
11.8
18.3
-
14.2
nil
22.0
10.8
Turb
8.0
4.0
2.0
12.0
8.0
8.0
9.0
7.0
1.0
.4.0
-
4.0
1.0
12.0
6.1
. Na*
4.0
6.8
29.2
18.0
19.9
24.3
20.6
-
-
30.0
-
24.3
4.0
30.0
19.7
Chlorophyll*
A
-
0.28
0.06
0.004
0.00247
0.00111
0.01507
B
-
0.52
0.04
0.011
0.0038
0.00091
0.01948
Total
.
0.8
0.1
0.015
0.00627
0.00201
0.03454
Not enough samples
possible trace
Chlordane
nil
-
nil
nil
possible trace
-
0.00459
0.00607
-
-
0.00111
0.28
0.04416
0.00081
0.00132
-
-
0.00081
0.52
0.07467
0.00540
0.00739
-
-
0.00201
0.8
0.12132
Hard-
K* ness*
30
54
140
82
3.1 112
3.5 120
3.7 149
144
132
4.0 142
-
3.1 121
3.1 30
4.0 149
3.5 112
Solids*
Total Susp
101 80
114 nil
255 15
149 107
225 13
285 41
282 84
241 47
304 24
292 20
-
232 11
101 nil
304 107
226 42
Coliforms#
Total
470
-
270
12,000
' 122,000
24,000
2,000,000
2,500
5,000
1,600
-
-
.470
2,000,000
340,871
Fecal
-
-
-
-
-
-
120,000
500
330
60
-
-
60
120,000
30,222
-------
WAPATO IRRIGATION DISTRICT
Station Code: Sou
TABLE 2 - Paee 9
Sample
Date
4/15/63
4/24/63
** 5/27/63
6/17/63
7/1/63
7/15/63
8/19/63
9/9/63
9/23/63
10/14/63
11/12/63
1/15/64
Minimum
Maximum
Average
Sample
Temp.
pjl °C
8.1 12.5
7.5
18.5
7.0 22.0
7.4 20.0
7.4 21.1
7.6 20.8
6.8 21.2
7.2 19.0
7.4 16.0
12.0
No water
6,8 12.0
8.1 22.0
7.4
Date Color HCO-j*
4/15/63
4/24/63
** 5/27/63
6/17/63
7/1/63
7/15/63
8/19/63
9/9/63
9/23/63
10/14/63
11/12/63
1/15/64
Minimum
Maximum
Average
_
-
10
-
Sample lost
10
20
15
10
15
Sample lost
No water
10
20
14
Sol.
BOD* COD* NHq* NOi*
0.6 8.8 0.15 0.07
0.8 9.8 0.06 0.02
1.2 10.3 0.18 0.91
1.3 18.9 0.04 0.48
Sample lost in transit
1.8 6.6 0.13 0.60
1.2 7.1 0.02 2.33
0.9 3.9 0.05 0.87
1.2 5.8 nil 0.96
1.0 6.4 0.07 1.21
Sample lost in transit
_
0.6 3.9 nil 0.02
1.8 18.9 0.18 2.33
1.1 8.6 0.08 0.82
Pesticides
DDT Other
nil nil
trace nil
<50 ppt nil
nil nil
in transit
nil nil
57 ppt nil
nil nil
nil possible trace
Dieldrin
nil nil
in transit
-
nil nil
57 ppt possible trace
-
£0**
0.
0.
0.
0.
-
0.
0.
0.
0.
0.
-
-
0.
0.
0.
23
27
30
45
35
33
22
22
29
22
45
29
Cl*
6.0
6.0
5.1
1.7
-
4.8
7.1
2.3
3.1
4.7
-
-
1.7
7.1
4.5
SO^* Turb.
18.0 8.
8.0 9.
15.0 6.
20.0 60.
-
10.0 11.
7.8 9.
8.0 1.
9.9 4.
13.0 ,4.
-
-
7.8 1.
20.0 60.
12.2 12.
0
0
0
0
5
5
0
0
7
0
0
6
Na*
17.0
20.4
21.2
25.6
-
30.9
25.1
24.1
-
22.2
-
-
17.0
30.9
23.3
Chlorophyll*
A
_
0.08
0.13
0.001
-
0.00053
0.00324
0.00047
0.00221
0.00579
-
-
0.00047
0.13
0.02790
B
_
0.15
0.08
0.006
-
0.00068
0.00193
0.00045
0.00044
0.00115
-
-
0.00044
0.15
0.03008
Total
_
0.
0.
0.
-
0.
0.
0.
0.
0.
-
-
0.
0.
0.
23
21
007
0012
00518
00092
00265
00694
00092
23
05798
Hard-
K* ness*
79
84
122
120
-
4.1 132
3.8 144
3.7 145
136
3.7 144
-
3.7 79
4.1 145
3.8 123
Solids*
Total
187
213
230
226
-
393
302
248
238
234
-
-
187
393
252
Susp
90
105
44
24
-
151
56
6
12
4
-
-
4
151
55
Coliforms#
Total
120
-
1,600
48,000
250,000
47,000
80,000
1,200
9,000
1,200
-
-
120
250,000
48 , 680
Fecal
50
50
12
_
-
-
-
-
-
,000
200
500
240
-
-
200
,000
,735
-------
WAPATO IRRIGATION DISTRICT
Station Code: Cou
TABLE 2 - Page 10
Sample
Date
4/15/63 .
4/24/63
** 5/27/63
6/17/63
7/1/63
7/15/63
8/19/63
9/9/63
9/23/63
10/14/63
11/12/63
1/15/64
Minimum
Maximum
. Average
Sample
Date
4/15/63
4/24/63
** 5/27/63
6/17/63
7/1/63
7/15/63
8/19/63
9/9/63
9/23/63
10/14/63
11/12/63
1/15/64
Minimum
Maximum
Average
Temp
pH PC
No water
8.2
20.5
6.8 20.0
7.2 19.0
7.2 20.0
7.0 20.0
BOD* COD*
.
5.2 24.9
0.6 13.2
1.3 13.8
1.4 4.2
3.0 11.5
1.6 4.6
NHo*
j
0.42
0.29
-
nil
0.01
0.03
NOj*
0.02
0.19
0.94
1.04
0.64
2.81
Sol.
PO^*
0.19
0.51
-
0.22
0.27
0.19
Cl*
4.4
9.6
6.6
4.6
7.2
4.3
504*
4.0
36.0
-
10.5
18.0
8.4
Turb .
6.0
20.0
8.0
8.0
39.0
9.5
Na* K*
^-
20.8
34.8
-
20.3 3.6
24.7 3.5
28.3 4.9
Hard-
ness*
^
128
126
135
125
130
136
Solids*
Total Stisp
*
211 11
232 172
252 263
246 14
284 70
259 21
No sample received. -- - - - -.....- - -
7.6 18.0
8.1 16.0
11.0
- 6.0
6.8 6.0
8.2 20.5
7.4
1.4 8.4
1.9 10.0
0.7 10.0
Oi6 8.0
0.6 4.2
5.2 24.9
1.8 10.9
nil
0.01
0.02
0.03
nil
0.42
0.09
0.76
0.21
0.33
0.26
0.02
2.81
0.72
0.49
0.70
0.96
0.68
0.19
0.96
0.47
7.7
0.8
4.8
25.1
0.8
25.1
7.5
Pesticides
Color HCO«*
. ^ ^
No water
.
15
<»
15
15
15
No sample
20
20
35
13 298
13 298
35 298
19
DDT
.'
<50 ppt
nil
<50 ppt
nil
55 ppt
received
nil
nil
nil
nil
nil
55 ppt
Other
.
«»
nil
nil
nil
nil
nil
-'
possible trace
nil
nil
nil
nil
possible trace
0.
-
0.
0.
0.
-
0.
0.
0.
0.
0.
40.0
116.0
130.0
120.0
4.0
130.0
33.7
8.0
4.6
2.0
-
2.0
39.0
11.7
-
84.8 8.4
96.0 11.5
88.0 8.3
20.3 3.5
96.0 11.5
49-7 6.7
Chlorophyll*
A
^
06 0.
'
00078 0.
00184 0.
00286 0.
00188 0.
0118 0.
.
-
00078 0.
06 0.
01323 0.
B
04
00114
00195
0052
00025
00168
00025
04
00837
Total
-
0.1
-
0.00191
0.00379
0.00806
-
0.00213
0.01348
-
-
0.00191
0.1
0.02156
165
277
317 .
276
125
317
182
362 33
572 16
636 nil
580 nil
211 nil
636 263
363 60
Coliforms#
Total
-
2,700
85,000
93,000
180,000
70,000
-
10,000
5,300
-
- ' .
2,700
180,000
64,286
Fecal
.
-
-
_
-
30 ',000
-
1,400
730
.
-
730
30,000
10,710
-------
WAPATO IRRIGATION DISTRICT
Station Code: 302
TABLE 2 - Page 11
Sample
Date
4/15/63
4/24/63
5/27/63
6/17/63
7/1/63
7/15/63
8/19/63
9/9/63
9/23/63
10/14/63
11/12/63
1/15/64
Minimum
Maximum
Average
Sample
Date
4/15/63
4/24/63
5/27/63
6/17/63
7/1/63
7/15/63
8/19/63
9/9/63
9/23/63
10/14/63
11/12/63
1/15/64
Minimum
Maximum
Average
Temp .
pH °C
8.2 14.2
7.0
23.8
7.2 25.5
7.8 26.0
8.0 25.0
8.0 21.3
BOD* COD*
0.6 12.
1.4 23.
1.2 23.
1.9 22.
2.9 8.
3.5 10.
2.4 8.
7
7
0
6
2
0
8
Sol.
133* NQ3* P04*
0.04 0.06 0.19
0.25 nil 0.22
0.28 0.17 0.42
0.10 0.48 0.39
0.06 0.60 0.27
0.11 0.62 0.34
0.01 1.46 0.29
Cl*
1.0
1.0
2.6
4.4
3.5
4.3
3.8
so^*
nil
nil
8.0
11.0
14.0
8.0
8.1
Turb.
40.0
132.0
75.0
95.0
80.0
55.0
13.0
Na*
5.2
5.7
12.4
18.0
16.2
21.8
17.4
Hard-
K* ness*
49
64
74
111
3.6 105
4 .3 110
4.4 122
Solids*
Total SUSP
MMUBMMM
108
435
52
242
221
277
205
m «_B^.^^.
809
339
1200
652
333
245
157
No sample received -- - ... . . -_ __
8.0 20.0
No water
No water
No water
7.0 14.2
8.2 26.0
7.7
Color HCO,*
-
20 -
-
15
20
20
No sample
25
No water
No water
No water
15
25
20
2.5 9.
-
-
-
0.6 8.
3.5 23.
2.1 14.
DDT
nil
trace
<50 ppt
700 ppt
400 ppt
1AOO ppt
45 ppt
received <
nil
-
-
-
nil
1400 ppt
-
8
2
7
9
s
nil 0.56 0.40
...
-
nil nil 0.19
0.28 1.46 0.42
0.11 0.49 0.32
Pesticides
Other
nil
nil
nil
740 ppt Dieldrin
nil
Dieldrin present
nil
.
possible trace
Dieldrin
-
- .
-
nil
740 ppt Dieldrin
-
3.4
-
-
1.0
4.4
3.0
10.9
-;
-
nil
14.0
7.5
7.5
-
-
-
7.5
132.0
62.0
-
-
-
5.2
21.8
13.8
Chlorophyll*
^
0.
0.
0.
0.
0.
0.
.
0.
-
1
. -
0.
o.
0.
A
1 0
2 0
004 0
00296 0
00176 0
00286 0
00206 0
00176 0
2 0
04480 0
B
.05
.05
.004
.00373
.00264
.0052
-
.00018
.00018
.05
.01653
Total
0.15
0.25
0.012
0.00669
0 .00439
0.00806
-
0.00224
-
-
. -
0.00224
0.25
0.06191
121
-
-
' - . -
3.6 49
4 .4 122
4.1 95
270
-
.
-
52
435
226
79
.
-.
-
79
1200
477
Coliforms^
Total
10
-
4,200
80,000
105,000
280,000
160 ,000
w
-
-
.
-
10
280,000
104,868
Fecal
^
'.
-
.
-
-
10,
-
-
.
.
-
10,
10,
-
*
000
-
000
000
-------
WAPATO IRRIGATION DISTRICT
Station Code: 303
TABLE 2 - Page 12
Sample
Date
4/15/63
4/24/63
5/27/63
6/17/63.
7/1/63
7/15/63
8/19/63
9/9/63
9/23/63
10/14/63
11/12/63
1/15/64
Minimum
Maximum
Average
Sample
Temo.
pH °C
8.4 13.
6.9
22.
7.4 26.
7.8 22.
8.0 22.
8.0 21.
No sample
8.2 20.
8.4 16.
No water
No water
6.9 13.
8.4 26.
7.9
BOD* COD*
6 1.2 6.4
0.7 8.0
3 0.9 12.8
5 1.9 17.4
0 2.2 8.2
2 2.5 6.6
3 2.1 8.4
received
0 3.4 7.5
0 1.3 7.0
-
-
6 0.7 6.4
5 3.4 17.4
1.8 9.1
NH *
3
0.11
0.07
0.21
0.03
0.05
nil
0.05
-
0.02
0.04
-
-
nil
0.21
0.06
NO *
3
0.03
0.09
0.32
1.14
0.97
0.87
3.36
-
1.22
2.33
-
-
0.03
2.33
1.14
Sol.
PO *
4
0.15
0.14
0.26
0.36
0.21
0.24
0.28
-
0.29
0.21
-
-
0.14
0.36
0.23
Pesticides
Date Color HCO_*
4/15/63
4/24/63
5/27/63
6/17/63
7/1/63
7/15/63
8/19/63
9/9/63
9/23/63
10/14/63
11/12/63
1/15/64
Minimum
Maximum
Average
:
-
15
-
20
15
20
DDT
nil
nil
<50 ppt
nil
140 ppt
nil to trace
nil
Other
nil
trace Aldrin
nil
nil
nil
nil
nil
Cl* SO *
4
2.0 5.0
1.8 2.0
3.0 9.0
6.7 31.0
3.7 11.0
4.3 11.0
4.7 13.0
-
4.6 19.7
9.3 52.6
-
-
1.8 2.0
9.7 52.6
4.5 17.1
Turb.
11.0
9.0
50.0
60.0
72.0
25.0
7.0
-
6.5
6.4
-
-
6.4
72.0
27.4
Na* K*
6.1
6.6
10.8
23.6
16.8 3.6
21.3 3.6
19.2 4.4
-
-
24.3 3.3
-
- -
6.1 3.3
24.3 4.4
16.1 3.7
Chlorophyll*
A
_
0.21
0.1
0.001
0.00318
0.00055
0.00714
B
_
0.28
0.03
0.006
0.00496
0.00045
0.01301
Hard-
Soli<
ness* Total
52
70
68
128
107
107
126
-
122
133
-
-
52
133
101
107
123
76
260
233
295
209
-
272
264
-
76
295
204
is*
Susp
289
7
262
88
261
111
137
-
43
28
-
7
289
136
Coliforms#
Total Total
-
0.49
0.13
0.007
0.00814
0.001
0.02016
1,900
-
54,000
300,000
300,000
105,000
79,000
Fecal
12
-
-
-
-
-
-
,000
No sample received - - - -
20
15
No water
No water
15
20
18
nil
nil
-
-
nil
140 ppt
-
possible trace
trace
-
-
nil
trace
-
0.00217
0.00734
-
-
0.00055
0.21
0.04142
0.00077
0.00086
-
-
0.00045
0.28
0.042
0.00293
0.0082
-
-
0.001
0.49
0.08342
23,000
3,500
-
-
1,900
300,000
108,300
12
1
-
190
-
-
190
,odo
,524
------- |