Concentration Limits
| ||
---|---|---|
Parameter
|
30-Day Average
(mg/l)
|
24-Hour Average
(mg/l)
|
Cadmium
|
0.25
|
0.5
|
Hex. chromium
|
0.1
|
0.2
|
Total chromium
|
1.70
|
3.4
|
Copper
|
2.05
|
4.1
|
Lead
|
0.4
|
0.8
|
Mercury
|
0.1
|
0.2
|
Nickel
|
2.0
|
4.0
|
Zinc
|
1.5
|
3.0
|
Arsenic
|
0.1
|
0.2
|
Available chlorine
|
15.0
|
15.0
|
Cyanide-free
|
0.2
|
0.4
|
Cyanide, total
|
0.65
|
1.3
|
Selenium
|
0.1
|
0.2
|
Sulfide
|
3.0
|
6.0
|
Barium
|
2.0
|
4.0
|
Manganese
|
2.0
|
4.0
|
Gold
|
0.1
|
0.2
|
Silver
|
0.2
|
0.4
|
Fluorides
|
2.0
|
4.0
|
Phenol
|
2.0
|
4.0
|
Total toxic organics
|
1.0
|
2.0
|
Constituents
|
Maximum Levels
(ppm)
|
---|---|
BOD
|
300
|
Suspended solids (SS)
|
350
|
Chlorine demand
|
15
|