Permitted Toxic Substances and Levels of Concentration
| ||
---|---|---|
Substance
|
24-Hour Average
(mg/l)
|
30-Day Average
(mg/l)
|
Arsenic (As)
|
1.0
|
0.5
|
Barium (Ba)
|
4.0
|
2.0
|
Cadmium (Cd)
|
0.8
|
0.4
|
Chromium, total (Cr)
|
1.60
|
0.80
|
Cyanide, total (CN)
|
3.0
|
1.5
|
Cyanide, free (CN)
|
1.0
|
0.50
|
Dissolved copper (Cu)
|
1.6
|
0.80
|
Iron (Fe)
|
10.0
|
5.0
|
Lead (Pb)
|
1.0
|
0.50
|
Manganese (Mn)
|
8.0
|
4.0
|
Nickel (Ni)
|
2.0
|
1.0
|
Selenium (Se)
|
4.0
|
2.0
|
Soluble silver (Ag)
|
2.0
|
1.0
|
Zinc (Zn)
|
4.0
|
2.0
|
Maximum Allowable Industrial Loading
| ||
---|---|---|
Maximum Allowable Industrial Loading
| ||
Pollutant of Concern
|
Town
|
Village
|
Ammonia
|
40 mg/l
|
40 mg/l
|
Arsenic
|
2.52 pounds per day
|
1.4 pounds per day
|
Cadmium
|
1.89 pounds per day
|
0.54 pounds per day
|
Chromium (total)
|
10.4 pounds per day
|
1.89 pounds per day
|
Dissolved copper
|
6.3 pounds per day
|
1.3 pounds per day
|
Cyanide (total)
|
2.9 pounds per day
|
22.5 pounds per day
|
Free cyanide
|
0.5 mg/l
|
0.5 mg/l
|
Iron
|
10.0 mg/l
|
10.0 mg/l
|
Lead
|
1.0 mg/l
|
1.0 mg/l
|
Manganese
|
12.0 pounds per day
|
42.0 pounds per day
|
Nickel
|
11.3 pounds per day
|
4.1 pounds per day
|
Selenium
|
0.36 pounds per day
|
0.18 pounds per day
|
Dissolved silver
|
0.15 pounds per day
|
0.11 pounds per day
|
Total phenols
|
1.0 mg/l
|
1.0 mg/l
|
Total toxic organics
|
2.13 mg/l
|
2.13 mg/l
|
Zinc
|
4.45 pounds per day
|
1.75 pounds per day
|