---
kind: "section"
citation: "40 C.F.R. § 141.152"
title: "40"
number: "141.152"
heading: "Compliance dates."
url: "https://uscodex.org/cfr/40/141.152"
---

# §141.152. Compliance dates.

- (a) Between June 24, 2024, and December 31, 2026, community water systems must comply with [40 CFR 141.151 through 141.155](/cfr/40/141.151..141.155.md) (except [§ 141.153(d)(4)(xii)](/cfr/40/141.153.md?p=d-4-xii)), as codified on July 1, 2023. Beginning January 1, 2027, community water systems must comply with [40 CFR 141.151 through 141.156](/cfr/40/141.151..141.156.md) (except [§ 141.153(8)(h)(i)](/cfr/40/141.153.md?p=8-h-i)), as codified on July 1, 2024. Beginning November 1, 2027, community water systems must comply with [40 CFR 141.151 through 141.156](/cfr/40/141.151..141.156.md), as codified on July 1, 2025.
- (b) Each existing community water system must deliver reports according to [§ 141.155](/cfr/40/141.155.md) by July 1 each year. Each report delivered by July 1 must contain data collected during the previous calendar year, or the most recent calendar year before the previous calendar year.
- (c) A new community water system must deliver its first report by July 1 of the year after its first full calendar year in operation.
- (d) A community water system that sells water to another community water system must deliver the applicable information required in [§ 141.153](/cfr/40/141.153.md) to the buyer system:
  - (1) By April 1, 2027, and annually thereafter; or
  - (2) On a date mutually agreed upon by the seller and the purchaser, and specifically included in a contract between the parties; and
  - (3) A community water system that sells water to another community water system that is required to provide reports biannually according to [§ 141.155(i)](/cfr/40/141.155.md?p=i) must provide the applicable information required in [§ 141.155(j)](/cfr/40/141.155.md?p=j) by October 1, 2027, to the buyer system, and annually thereafter, or a date mutually agreed upon by the seller and the purchaser, included in a contract between the parties.

## Notes

### Amendments

[63 FR 44526, Aug. 19, 1998, as amended at 89 FR 46008, May 24, 2024; 89 FR 86662, Oct. 30, 2024]

### Source

Source: 63 FR 44526, Aug. 19, 1998, 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.

### Amendments

[63 FR 44526, Aug. 19, 1998, as amended at 89 FR 46008, May 24, 2024; 89 FR 86662, Oct. 30, 2024]