WSP06331

• File Number: 8170
• Description: Arkansas Basin Water Quality Issues
• State: CO
• Basin: Arkansas
• Water Division: 2
• Date: 1/1/1991
• Author: USGS
• Title: Reconnaissance Investigation of Water Quality - Bottom Sediment - and Biota Associated with Irrigation Drainage in the Middle Arkansas River Basin - Colorado and Kansas - 1988-89
• Water Supply Pro - Doc Type: Report/Study

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Table 5.--Colorado and Kansas water-quality standards and U.S. Environmental Protection Agency
criteria for protection of aquatic life]

(~g/L, micrograms per liter; (EPA) , U.S. Enviro~ental Protection Agency criteria applied as
State standard; I no standard or criterionj *, standard or criterion based on hardness
(values are shown for a hardness range of lOO~l,OOO mg/L)]

Property
or
constituent

pH
Arsenic
Cadmium
Chromium (I I I)
Chromium (VI)
Copper

Lead
Mercury
Selenium
Uranium
Zinc

Units

standard
~g/L
~g/L
~g/L
~g/L
~g/L

~g/L
~g/L
~g/L
~g/L
~g/L

Colorado
Chronic Acute

6.5-9.0
150
L 1-6.9*
210-1,360*
II
12 -85*

3.9-102*
0.1
17
1,500-18,980*
45-990*

6.5-9.0
360
9.9-133*
1,740-11,450*
16
18-155*

96-3,950*
2.4
135
2,400-30,400*
220-1,400*

Kansas

6.5-8.5
(EPA)
(EPA)
(EPA)
(EPA)
(EPA)

(.EPA)
(EPA)
35

47

U.S. Environmental
Protection AxeDcy
Chronic Acute

6.5-9.0
190
L 1-6.9"
210-1,360*
II
12-85*

6.5-9.0
360
3,9-53*
1,740-11,450*
16
18-155*

3.2-60*
0.012
5.0

82-1,530*
2.4
20

110-746*

120-820*

lSources: Colorado Department of Health, 1987 and 1988j Kansas Department of Health and
Environment, written commun. I 1987; U.S. Environmental Protection Agency, 1986 and 1987.

Table 6.--Colorado and Kansas water-quality standards and U.S. Environmental Protection Agency
maximum contaminant levels for domestic water and agricultural supplies1

[mg/L, milligrams per liter; ~g/L, micrograms per literj --, no standard or maximum
contaminant level; PHCL. proposed maximum contaminant level)

Property Domestic water supply Agricultural supply
or Units U.S. Environmental
constituent Colorado Kansas Protection Agency Colorado Kansas
pH standard 5.0-9.0 6.5-8.5 5.0-9.0
Dissolved solids IIg/L 1,000 2,500
Chloride IIg/L 250 250
Sulfate mg/L 250 250 1,000
Nitrate .. nitrogen 118/L 10 10 10 100
Arsenic ~g/L 50 50 50 100 100
Boron ~g/L 750 750
Cadmium ~g/L 10 10 10 10 10
Chromium ~g/L 50 50 50 100
Coppe r ~g/L 1,000 1,000 200 200
Lead ~g/L 50 50 50 100 100
Mercury ~g/L 2 2 2
Selenium ~8/L 10 10 10 (PHCL 50) 20 20
Zinc ~g/L 5,000 5,000 2,000 2,000
2,4-0 ~g/L 100 100
2,4,5-1 ~glL 21
Silvex ~g/L 10
ISources: Colorado Department of Health, 1987 and 1988; Kansas Department of Health and
Environment, written commun., 1987 ; U.S. Environmental Protection Agency, 1986 and 1987.

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