---
kind: "section"
citation: "40 C.F.R. § 141.209"
title: "40"
number: "141.209"
heading: "Special notice for nitrate exceedances above MCL by non-community water systems (NCWS), where granted permission by the primacy agency under § 141.11(d)."
url: "https://uscodex.org/cfr/40/141.209"
---

# §141.209. Special notice for nitrate exceedances above MCL by non-community water systems (NCWS), where granted permission by the primacy agency under § 141.11(d).

- (a) **When is the special notice to be given?** The owner or operator of a non-community water system granted permission by the primacy agency under [§ 141.11(d)](/cfr/40/141.11.md?p=d) to exceed the nitrate MCL must provide notice to persons served according to the requirements for a Tier 1 notice under § [141.202(a)](/cfr/40/141.202.md?p=a) and [(b)](/cfr/40/141.202.md?p=b).
- (b) **What is the form and manner of the special notice?** Non-community water systems granted permission by the primacy agency to exceed the nitrate MCL under [§ 141.11(d)](/cfr/40/141.11.md?p=d) must provide continuous posting of the fact that nitrate levels exceed 10 mg/l and the potential health effects of exposure, according to the requirements for Tier 1 notice delivery under [§ 141.202(c)](/cfr/40/141.202.md?p=c) and the content requirements under [§ 141.205](/cfr/40/141.205.md).

## Notes

### Source

Source: 65 FR 26035, May 4, 2000, unless otherwise noted.

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