republic-os/legislation/us/states/ca/20232024/ab-30.md

---
type: "Bill"
title: "Atmospheric rivers: research: reservoir operations."
description: "Existing law establishes the Atmospheric Rivers: Research, Mitigation, and Climate Forecasting Program in the Department of Water Resources. Existing law requires the department, upon an appropriation for purposes of the program, to research climate forecasting and the causes and impacts that climate change has on atmospheric rivers, to operate reservoirs in a manner that improves flood protection, and to reoperate flood control and water storage facilities to capture water generated by atmospheric rivers."
jurisdiction: "us/states/ca"
legislature: "California Legislature"
session: "20232024"
identifier: "AB 30"
citation: "California AB 30 (20232024)"
classification: ["bill"]
subjects: ["Atmospheric rivers", "research", "reservoir operations"]
status: "enacted"
primary_sponsors: ["Ward"]
version_count: 5
action_count: 22
vote_count: 6
first_action: "2022-12-05"
last_action: "2023-09-01"
source: "openstates"
source_identifier: "ocd-bill/ae3d5b45-63dc-4ee2-a56b-a05fac90fc9f"
source_url: "http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=202320240AB30"
source_hash: "4e6d18cf9fc6fb4839812b75d23c615e0ba89cfb9a06605b177052b63a9415e1"
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 30 (20232024) — Atmospheric rivers: research: reservoir operations.

Existing law establishes the Atmospheric Rivers: Research, Mitigation, and Climate Forecasting Program in the Department of Water Resources. Existing law requires the department, upon an appropriation for purposes of the program, to research climate forecasting and the causes and impacts that climate change has on atmospheric rivers, to operate reservoirs in a manner that improves flood protection, and to reoperate flood control and water storage facilities to capture water generated by atmospheric rivers.

## Version chain

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

1. **12/05/22 - Introduced** (filed) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202320240AB30&version=20230AB3099INT)
2. **06/26/23 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202320240AB30&version=20230AB3098AMD)
3. **09/01/23 - Chaptered** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202320240AB30&version=20230AB3096CHP)
4. **AB30** (committee substitute) — [source](http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=202320240AB30)
5. **08/15/23 - Enrolled** (enrolled) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202320240AB30&version=20230AB3097ENR)

## Votes

- AB 30 Ward Assembly Third Reading — **76–0** (pass) · lower
- Do pass. — **15–0** (pass) · lower
- Consent Calendar AB30 Ward et al. — **37–0** (pass) · upper
- Do pass, but first be re-referred to the Committee on [Appropriations] with the recommendation: To Consent Calendar — **11–0** (pass) · upper
- AB 30 Ward Concurrence in Senate Amendments — **76–0** (pass) · lower
- Do pass and be re-referred to the Committee on [Appropriations] — **15–0** (pass) · lower

## Sponsors

- Ward — primary (person)
- Aguiar-Curry — coauthor (person)
- Alanis — coauthor (person)
- Bennett — coauthor (person)
- Connolly — coauthor (person)
- Friedman — coauthor (person)
- Kalra — coauthor (person)
- Niello — coauthor (person)
- Pellerin — coauthor (person)
- Schiavo — coauthor (person)

## Timeline

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

- **2022-12-05** Read first time. To print. `reading-1`
- **2022-12-06** From printer. May be heard in committee January 5.
- **2023-01-26** Referred to Com. on W., P., & W. `referral-committee`
- **2023-03-14** Coauthors revised.
- **2023-03-14** From committee: Do pass and re-refer to Com. on APPR. (Ayes 15. Noes 0.) (March 14). Re-referred to Com. on APPR. `committee-passage, committee-passage-favorable, referral-committee`
- **2023-04-26** In committee: Set, first hearing. Referred to APPR. suspense file. `referral-committee`
- **2023-05-18** From committee: Do pass. (Ayes 15. Noes 0.) (May 18). `committee-passage, committee-passage-favorable`
- **2023-05-18** Read second time. Ordered to third reading. `reading-1, reading-2`
- **2023-05-22** Read third time. Passed. Ordered to the Senate. (Ayes 76. Noes 0. Page 1710.) `passage, reading-1, reading-3`
- **2023-05-23** In Senate. Read first time. To Com. on RLS. for assignment. `reading-1`
- **2023-05-31** Referred to Com. on N.R. & W. `referral-committee`
- **2023-06-07** In committee: Hearing postponed by committee.
- **2023-06-22** From committee: Do pass and re-refer to Com. on APPR with recommendation: To Consent Calendar. (Ayes 11. Noes 0.) (June 22). Re-referred to Com. on APPR. `committee-passage, committee-passage-favorable, referral-committee`
- **2023-06-26** From committee chair, with author's amendments: Amend, and re-refer to committee. Read second time, amended, and re-referred to Com. on APPR. `amendment-introduction, amendment-passage, reading-1, reading-2, referral-committee`
- **2023-07-03** From committee: Be ordered to second reading file pursuant to Senate Rule 28.8 and ordered to Consent Calendar. `committee-passage, reading-2`
- **2023-07-05** Read second time. Ordered to Consent Calendar. `reading-1, reading-2`
- **2023-07-13** Read third time. Passed. Ordered to the Assembly. (Ayes 37. Noes 0. Page 2036.). `passage, reading-1, reading-3`
- **2023-07-13** In Assembly. Concurrence in Senate amendments pending. May be considered on or after August 11 pursuant to Assembly Rule 77.
- **2023-08-14** Senate amendments concurred in. To Engrossing and Enrolling. (Ayes 76. Noes 0. Page 2673.). `amendment-passage, committee-passage-favorable`
- **2023-08-22** Enrolled and presented to the Governor at 3:45 p.m.
- **2023-09-01** Approved by the Governor. `executive-signature`
- **2023-09-01** Chaptered by Secretary of State - Chapter 134, Statutes of 2023. `became-law`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/ae3d5b45-63dc-4ee2-a56b-a05fac90fc9f`. Confidence: reported (aggregated from official California legislature records).