---
type: "Bill"
title: "Drinking water standards: emergency notification plan."
description: "Existing law prohibits a person from operating a public water system without an emergency notification plan that has been submitted to and approved by the State Water Resources Control Board."
jurisdiction: "us/states/ca"
legislature: "California Legislature"
session: "20232024"
identifier: "AB 3090"
citation: "California AB 3090 (20232024)"
classification: ["bill"]
subjects: ["Drinking water standards", "emergency notification plan"]
status: "enacted"
primary_sponsors: ["Maienschein"]
version_count: 5
action_count: 18
vote_count: 4
first_action: "2024-02-16"
last_action: "2024-07-02"
source: "openstates"
source_identifier: "ocd-bill/51953378-23e5-483f-96ec-47cf493c1f87"
source_url: "http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=202320240AB3090"
source_hash: "166cdb5bb7cdd7877334b9f686d128dc53b2e79006f85ebd2d38ad7bbde83a40"
vintage: "2026-07-01"
source_snapshot: "https://data.openstates.org/daily/2026-07-01/public.pgdump"
retrieved_at: "2026-07-06"
confidence: "reported"
tags: ["legislation", "bill", "us-ca"]
---

# California AB 3090 (20232024) — Drinking water standards: emergency notification plan.

Existing law prohibits a person from operating a public water system without an emergency notification plan that has been submitted to and approved by the State Water Resources Control Board.

## Version chain

The bill's text revisions, in order — the diff chain from filing to enrollment.

1. **02/16/24 - Introduced** (filed) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202320240AB3090&version=20230AB309099INT)
2. **04/18/24 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202320240AB3090&version=20230AB309098AMD)
3. **07/02/24 - Chaptered** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202320240AB3090&version=20230AB309096CHP)
4. **AB3090** (committee substitute) — [source](http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=202320240AB3090)
5. **06/18/24 - Enrolled** (enrolled) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202320240AB3090&version=20230AB309097ENR)

## Votes

- Do pass and be ordered to the Consent Calendar — **7–0** (pass) · upper
- AB 3090 Maienschein Assembly Third Reading — **73–0** (pass) · lower
- Consent Calendar 2nd — **37–0** (pass) · upper
- Do pass. — **7–0** (pass) · lower

## Sponsors

- Maienschein — primary (person)

## Timeline

The legislative action history — every referral, reading, and vote.

- **2024-02-16** Read first time. To print. `reading-1`
- **2024-02-17** From printer. May be heard in committee March 18.
- **2024-03-11** Referred to Com. on E.S. & T.M. `referral-committee`
- **2024-04-02** In committee: Set, first hearing. Hearing canceled at the request of author.
- **2024-04-18** From committee chair, with author's amendments: Amend, and re-refer to Com. on E.S. & T.M. Read second time and amended. `amendment-introduction, amendment-passage, reading-1, reading-2`
- **2024-04-22** Re-referred to Com. on E.S. & T.M. `referral-committee`
- **2024-04-24** From committee: Do pass. (Ayes 7. Noes 0.) (April 23). `committee-passage, committee-passage-favorable`
- **2024-04-25** Read second time. Ordered to third reading. `reading-1, reading-2`
- **2024-04-29** Read third time. Passed. Ordered to the Senate. (Ayes 73. Noes 0. Page 5033.) `passage, reading-1, reading-3`
- **2024-04-29** In Senate. Read first time. To Com. on RLS. for assignment. `reading-1`
- **2024-05-08** Referred to Com. on E.Q. `referral-committee`
- **2024-06-05** From committee: Do pass. To Consent Calendar. (Ayes 7. Noes 0.) (June 5). `committee-passage, committee-passage-favorable`
- **2024-06-06** Read second time. Ordered to Consent Calendar. `reading-1, reading-2`
- **2024-06-13** Read third time. Passed. Ordered to the Assembly. (Ayes 37. Noes 0. Page 4489.). `passage, reading-1, reading-3`
- **2024-06-13** In Assembly. Ordered to Engrossing and Enrolling. `committee-passage`
- **2024-06-25** Enrolled and presented to the Governor at 4 p.m.
- **2024-07-02** Approved by the Governor. `executive-signature`
- **2024-07-02** Chaptered by Secretary of State - Chapter 68, Statutes of 2024. `became-law`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/51953378-23e5-483f-96ec-47cf493c1f87`. Confidence: reported (aggregated from official California legislature records).