Substance
|
Maximum 24-Hour Composite Concentrations
(milligrams per liter)
|
---|---|
Cadmium
|
0.4
|
Hex. chromium
|
0.2
|
Total chromium
|
4.0
|
Copper
|
0.8
|
Lead
|
0.2
|
Mercury
|
0.2
|
Nickel
|
4.0
|
Zinc
|
0.2
|
Arsenic
|
0.2
|
Available chlorine
|
50.0
|
Cyanide-free
|
0.4
|
Cyanide-complex
|
1.6
|
Selenium
|
0.2
|
Sulfide
|
6.0
|
Barium
|
4.0
|
Manganese
|
4.0
|
Gold
|
0.2
|
Silver
|
0.2
|
Fluorides to fresh water
|
4.0*
|
Phenol
|
4.0
|
*
|
May be multiplied by a factor of 1.5 if the municipal water
supply is not fluoridated.
|