---
kind: "section"
citation: "40 C.F.R. § 142.63"
title: "40"
number: "142.63"
heading: "Variances and exemptions from the maximum contaminant level for total coliforms."
url: "https://uscodex.org/cfr/40/142.63"
---

# §142.63. Variances and exemptions from the maximum contaminant level for total coliforms.

- (a) No variances or exemptions from the maximum contaminant level in [§ 141.63](/cfr/40/141.63.md) of this chapter are permitted.
- (b) EPA has stayed this section as it relates to the total coliform MCL of [§ 141.63(a)](/cfr/40/141.63.md?p=a) of this chapter for systems that demonstrate to the State that the violation of the total coliform MCL is due to a persistent growth of total coliforms in the distribution system rather than fecal or pathogenic contamination, a treatment lapse or deficiency, or a problem in the operation or maintenance of the distribution system. This stay is applicable until March 31, 2016, at which time the total coliform MCL is no longer applicable.

## Notes

### Amendments

[54 FR 27568, June 29, 1989, as amended at 56 FR 1557, Jan. 15, 1991; 78 FR 10365, Feb. 13, 2013]

### Authority

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

Source: 41 FR 2918, Jan. 20, 1976, unless otherwise noted.

### Amendments

[54 FR 27568, June 29, 1989, as amended at 56 FR 1557, Jan. 15, 1991; 78 FR 10365, Feb. 13, 2013]