40 CFR 141.52 - Maximum contaminant level goals for microbiological contaminants.

Regulations last checked for updates: Oct 02, 2026

Title 40 - Protection of Environment last revised: Sep 29, 2026

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

§ 141.52 - Maximum contaminant level goals for microbiological contaminants.

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

Contaminant	MCLG
(1) Giardia lamblia	zero
(2) Viruses	zero
(3) Legionella	zero
(4) Total coliforms (including fecal)	zero
coliforms and Escherichia coli
(5) Cryptosporidium	zero
(6) Escherichia coli (E. coli)	zero

(b) The MCLG identified in paragraph (a)(4) of this section is applicable until March 31, 2016. The MCLG identified in paragraph (a)(6) of this section is applicable beginning April 1, 2016.

[78 FR 10347, Feb. 13, 2013]

authority: 42 U.S.C. 300f,300g,300g,300g,300g,300g,300g,300j,300j,and

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

cite as: 40 CFR 141.52