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---
type: "Bill"
title: "Drinking water: primary standard for hexavalent chromium: exemption."
description: "The California Safe Drinking Water Act provides for the operation of public water systems and imposes on the State Water Resources Control Board various duties and responsibilities for the regulation and control of drinking water in the State of California. The act requires the state board to adopt primary drinking water standards for contaminants in drinking water based upon specified criteria, and requires a primary drinking water standard to be established for hexavalent chromium. Existing law authorizes the state board to grant a variance from primary drinking water standards to a public water system."
jurisdiction: "us/states/ca"
legislature: "California Legislature"
session: "20252026"
identifier: "SB 466"
citation: "California SB 466 (20252026)"
classification: ["bill"]
subjects: ["Drinkingwater", "exemption", "primarystandardforhexavalentchromium"]
status: "enacted"
primary_sponsors: ["Caballero"]
version_count: 10
action_count: 34
vote_count: 8
first_action: "2025-02-19"
last_action: "2025-10-03"
source: "openstates"
source_identifier: "ocd-bill/79e1f43f-f0f7-4f60-aadc-352f4899991e"
source_url: "http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=202520260SB466"
source_hash: "b81c8299f4af8f1bfa08924a00aeb8c5924986347e0a664297ff00d9ed32c86a"
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 SB 466 (20252026) — Drinking water: primary standard for hexavalent chromium: exemption.
The California Safe Drinking Water Act provides for the operation of public water systems and imposes on the State Water Resources Control Board various duties and responsibilities for the regulation and control of drinking water in the State of California. The act requires the state board to adopt primary drinking water standards for contaminants in drinking water based upon specified criteria, and requires a primary drinking water standard to be established for hexavalent chromium. Existing law authorizes the state board to grant a variance from primary drinking water standards to a public water system.
## Version chain
The bill's text revisions, in order — the diff chain from filing to enrollment.
1. **02/19/25 - Introduced** (filed) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202520260SB466&version=20250SB46699INT)
2. **03/24/25 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202520260SB466&version=20250SB46698AMD)
3. **05/01/25 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202520260SB466&version=20250SB46697AMD)
4. **05/21/25 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202520260SB466&version=20250SB46696AMD)
5. **06/24/25 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202520260SB466&version=20250SB46695AMD)
6. **07/17/25 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202520260SB466&version=20250SB46694AMD)
7. **08/25/25 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202520260SB466&version=20250SB46693AMD)
8. **10/03/25 - Chaptered** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202520260SB466&version=20250SB46691CHP)
9. **SB466** (committee substitute) — [source](http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=202520260SB466)
10. **09/16/25 - Enrolled** (enrolled) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=202520260SB466&version=20250SB46692ENR)
## Votes
- Do pass, but first be re-referred to the Committee on [Judiciary] with the recommendation: To Consent Calendar — **80** (pass) · upper
- 3rd Reading — **370** (pass) · upper
- Special Consent SB466 Caballero et al. — **400** (pass) · upper
- Do pass as amended, but first amend, and re-refer to the Committee on [Appropriations] — **130** (pass) · upper
- SB 466 Caballero Senate Third Reading By Soria — **770** (pass) · lower
- Do pass as amended and be re-referred to the Committee on [Appropriations] — **120** (pass) · lower
- Do pass. — **150** (pass) · lower
- Do pass and be re-referred to the Committee on [Judiciary] — **70** (pass) · lower
## Sponsors
- Caballero — primary (person)
- Macedo — coauthor (person)
- Soria — coauthor (person)
## Timeline
The legislative action history — every referral, reading, and vote.
- **2025-02-19** Introduced. Read first time. To Com. on RLS. for assignment. To print. `introduction, reading-1`
- **2025-02-20** From printer. May be acted upon on or after March 22.
- **2025-02-26** Referred to Com. on RLS. `referral-committee`
- **2025-03-24** From committee with author's amendments. Read second time and amended. Re-referred to Com. on RLS. `amendment-passage, committee-passage, reading-1, reading-2, referral-committee`
- **2025-04-02** Re-referred to Coms. on E.Q. and JUD. `referral-committee`
- **2025-04-04** Set for hearing April 23.
- **2025-04-11** Set for hearing April 29 in JUD. pending receipt.
- **2025-04-23** From committee: Do pass and re-refer to Com. on JUD. with recommendation: To consent calendar. (Ayes 8. Noes 0. Page 866.) (April 23). Re-referred to Com. on JUD. `committee-passage, committee-passage-favorable, referral-committee`
- **2025-04-30** From committee: Do pass as amended and re-refer to Com. on APPR. (Ayes 13. Noes 0. Page 941.) (April 29). `amendment-passage, committee-passage, committee-passage-favorable`
- **2025-05-01** Read second time and amended. Re-referred to Com. on APPR. `amendment-passage, reading-1, reading-2, referral-committee`
- **2025-05-09** Set for hearing May 19.
- **2025-05-19** From committee: Be ordered to second reading pursuant to Senate Rule 28.8. `committee-passage, reading-2`
- **2025-05-20** Read second time. Ordered to third reading. `reading-1, reading-2`
- **2025-05-21** Read third time and amended. `amendment-passage, reading-1, reading-3`
- **2025-05-21** Ordered to second reading.
- **2025-05-22** Read second time. Ordered to third reading. `reading-1, reading-2`
- **2025-05-28** Read third time. Passed. (Ayes 37. Noes 0. Page 1275.) Ordered to the Assembly. `passage, reading-1, reading-3`
- **2025-05-28** In Assembly. Read first time. Held at Desk. `reading-1`
- **2025-06-05** Referred to Coms. on E.S & T.M. and JUD. `referral-committee`
- **2025-06-24** From committee with author's amendments. Read second time and amended. Re-referred to Com. on E.S & T.M. `amendment-passage, committee-passage, reading-1, reading-2, referral-committee`
- **2025-07-02** From committee: Do pass and re-refer to Com. on JUD. (Ayes 7. Noes 0.) (July 1). Re-referred to Com. on JUD. `committee-passage, committee-passage-favorable, referral-committee`
- **2025-07-16** From committee: Do pass as amended and re-refer to Com. on APPR. (Ayes 12. Noes 0.) (July 15). `amendment-passage, committee-passage, committee-passage-favorable`
- **2025-07-17** Read second time and amended. Re-referred to Com. on APPR. `amendment-passage, reading-1, reading-2, referral-committee`
- **2025-08-20** From committee: Do pass. (Ayes 15. Noes 0.) (August 20). `committee-passage, committee-passage-favorable`
- **2025-08-21** Read second time. Ordered to third reading. `reading-1, reading-2`
- **2025-08-25** Read third time and amended. `amendment-passage, reading-1, reading-3`
- **2025-08-25** Ordered to third reading.
- **2025-09-02** Read third time. Passed. (Ayes 77. Noes 0. Page 2817.) Ordered to the Senate. `passage, reading-1, reading-3`
- **2025-09-03** In Senate. Concurrence in Assembly amendments pending.
- **2025-09-09** Ordered to special consent calendar.
- **2025-09-11** Assembly amendments concurred in. (Ayes 40. Noes 0. Page 2928.) Ordered to engrossing and enrolling. `amendment-passage, committee-passage-favorable`
- **2025-09-22** Enrolled and presented to the Governor at 2 p.m.
- **2025-10-03** Approved by the Governor. `executive-signature`
- **2025-10-03** Chaptered by Secretary of State. Chapter 320, Statutes of 2025. `became-law`
## Source
OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/79e1f43f-f0f7-4f60-aadc-352f4899991e`. Confidence: reported (aggregated from official California legislature records).