1. Regulations
  2. title 40
  3. chapter I-i24
  4. part 141
  5. subpart F
  6. § 141.51

View all text of Subpart F [§ 141.50 - § 141.55]

§ 141.51 - Maximum contaminant level goals for inorganic contaminants.

(a) [Reserved]

(b) MCLGs for the following contaminants are as indicated:

Contaminant MCLG (mg/l) Antimony0.006 Arseniczero 1Asbestos7 Million fibers/liter (longer than 10 µm). 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.

[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]

AUTHORITY: 42 U.S.C. 300f, 300g-1, 300g-2, 300g-3, 300g-4, 300g-5, 300g-6, 300j-4, 300j-9, and 300j-11.

SOURCE: 40 FR 59570, Dec. 24, 1975, unless otherwise noted.

CITE AS: 40 CFR 141.51