(a) [Reserved]
(b) MCLGs for the following contaminants are as indicated:
Contaminant
| MCLG (mg/l)
|
---|
Antimony | 0.006
|
Arsenic | zero
1
|
Asbestos | 7 Million fibers/liter (longer than 10 µm).
|
Barium | 2
|
Beryllium | .004
|
Cadmium | 0.005
|
Chromium | 0.1
|
Copper | 1.3
|
Cyanide (as free Cyanide) | .2
|
Fluoride | 4.0
|
Lead | zero
|
Mercury | 0.002
|
Nitrate | 10 (as Nitrogen).
|
Nitrite | 1 (as Nitrogen).
|
Total Nitrate + Nitrite | 10 (as Nitrogen).
|
Selenium | 0.05
|
Thallium | .0005
|
[50 FR 47155, Nov. 14, 1985, as amended at 52 FR 20674, June 2, 1987; 56 FR 3593, Jan. 30, 1991; 56 FR 26548, June 7, 1991; 56 FR 30280, July 1, 1991; 57 FR 31846, July 17, 1992; 60 FR 33932, June 29, 1995; 66 FR 7063, Jan. 22, 2001]