40 C.F.R. § 141.51

Current through May 31, 2024
Section 141.51 - Maximum contaminant level goals for inorganic contaminants
(a) [Reserved]
(b) MCLGs for the following contaminants are as indicated:

ContaminantMCLG (mg/l)
Antimony0.006
Arseniczero1
Asbestos7 Million fibers/liter (longer than 10 [MICRO]m).
Barium2
Beryllium.004
Cadmium0.005
Chromium0.1
Copper1.3
Cyanide (as free Cyanide).2
Fluoride4.0
Leadzero
Mercury0.002
Nitrate10 (as Nitrogen).
Nitrite1 (as Nitrogen).
Total Nitrate + Nitrite10 (as Nitrogen).
Selenium0.05
Thallium.0005

1 This value for arsenic is effective January 23, 2006. Until then, there is no MCLG.

40 C.F.R. §141.51

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