# 2025-09273: California Updates Its Drinking Water Rules for Federal Approval

2025-09273, Revision of Approved State Primacy Program for the State of California, is a Federal Register notice from Environmental Protection Agency published 2025-05-23, effective 2025-06-23 (as of 2026-10-22).

- Canonical: https://policyrisk.com/federal-register/2025-09273
- As of: 2026-10-22
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Document number: 2025-09273
- Title: Revision of Approved State Primacy Program for the State of California
- Type: Notice
- Agencies: Environmental Protection Agency
- Citation: 90 FR 22088
- Published: 2025-05-23
- Effective: 2025-06-23
- Comments close: not stated
- Significant: no
- Touches household money: no
- Regulation identifier numbers: none
- Last updated: 2026-10-22

## In one line

California Updates Its Drinking Water Rules for Federal Approval

## Summary

California updated its drinking water rules to match federal standards, and the EPA just gave it a thumbs-up! This means California will keep running its water safety program with new, clear rules that protect everyone’s tap water. If you want to speak up, you’ve got until June 23, 2025, to ask for a public hearing.

## Abstract

Notice is hereby given that the State of California revised its approved State primacy program under the Federal Safe Drinking Water Act (SDWA) by adopting regulations that effectuate the Federal Public Water System (PWS) Definition. The Environmental Protection Agency (EPA) has determined that California's revision request meets the applicable SDWA program revision requirements and the regulations adopted by California are no less stringent than the corresponding Federal regulations. Therefore, EPA approves this revision to California's approved State primacy program. However, this determination on California's request for approval of a program revision shall take effect in accordance with the procedures described below in the SUPPLEMENTARY INFORMATION section of this document after the opportunity to request a public hearing.

## Effects PRIA read

No economic effects identified for this document.

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## Sources
- [2025-09273 on federalregister.gov](https://www.federalregister.gov/documents/2025/05/23/2025-09273/revision-of-approved-state-primacy-program-for-the-state-of-california)
- [2025-09273 as published (PDF)](https://www.govinfo.gov/content/pkg/FR-2025-05-23/pdf/2025-09273.pdf)

## Related
- [Previous: 2025-09272, Center for Scientific Review; Notice of Closed Meetings](https://policyrisk.com/federal-register/2025-09272)
- [Next: 2025-09275, Agency Information Collection Activities; Proposed Information Collection Reque…](https://policyrisk.com/federal-register/2025-09275)
- [All Federal Register documents](https://policyrisk.com/federal-register)

Source: PRIA, https://policyrisk.com/federal-register/2025-09273 (as of 2026-10-22).