---
type: "Bill"
title: "Hazardous substances: water quality."
description: "Hazardous substances: water quality."
jurisdiction: "us/states/ca"
legislature: "California Legislature"
session: "20072008"
identifier: "AB 422"
citation: "California AB 422 (20072008)"
classification: ["bill"]
subjects: ["Hazardous substances: water quality."]
status: "enacted"
primary_sponsors: ["Hancock"]
version_count: 10
action_count: 27
vote_count: 6
first_action: "2007-02-16"
last_action: "2007-10-13"
source: "openstates"
source_identifier: "ocd-bill/3af95e98-c470-46b4-9f7f-9cc2e0045ddf"
source_url: "http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=200720080AB422"
source_hash: "89c421f7f6c89231b3a427e4125ebc2c48fcf17389e888d0fc6e6c6f4da98859"
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 422 (20072008) — Hazardous substances: water quality.

## Version chain

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

1. **02/16/07 - Introduced** (filed) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=200720080AB422&version=20070AB42299INT)
2. **03/27/07 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=200720080AB422&version=20070AB42298AMD)
3. **06/01/07 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=200720080AB422&version=20070AB42297AMD)
4. **06/21/07 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=200720080AB422&version=20070AB42296AMD)
5. **06/27/07 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=200720080AB422&version=20070AB42295AMD)
6. **08/01/07 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=200720080AB422&version=20070AB42294AMD)
7. **08/21/07 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=200720080AB422&version=20070AB42293AMD)
8. **10/13/07 - Chaptered** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=200720080AB422&version=20070AB42291CHP)
9. **AB422** (committee substitute) — [source](http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=200720080AB422)
10. **09/07/07 - Enrolled** (enrolled) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=200720080AB422&version=20070AB42292ENR)

## Votes

- AB 422 HANCOCK Concurrence in Senate Amendments — **pass** (pass) · lower
- AB 422 HANCOCK Assembly Third Reading — **pass** (pass) · lower
- Do pass as amended. — **pass** (pass) · lower
- Do pass and be re-referred to the Committee on Appropriations. — **pass** (pass) · lower
- Assembly 3rd Reading AB422 Hancock By Kuehl — **pass** (pass) · upper
- Do pass, but re-refer to the Committee on Appropriations. — **pass** (pass) · upper

## Sponsors

- Hancock — primary (person)

## Timeline

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

- **2007-02-16** Read first time. To print. `reading-1`
- **2007-02-20** From printer. May be heard in committee March 22.
- **2007-02-26** Referred to Standing Committee on Environmental Safety and Toxic Materials. `referral-committee`
- **2007-03-27** From committee chair, with author's amendments: Amend, and re-refer to Standing Committee on Environmental Safety and Toxic Materials Read second time and amended. `reading-1, reading-2, amendment-passage, amendment-introduction, referral-committee`
- **2007-03-28** Re-referred to Standing Committee on Environmental Safety and Toxic Materials. `referral-committee`
- **2007-04-11** From committee: Do pass, and re-refer to Standing Committee on Appropriations Re-referred. (Ayes 5. Noes 2.) (April 10). `committee-passage, committee-passage-favorable, referral-committee`
- **2007-04-25** In committee: Set, first hearing. Referred to Standing Committee on Appropriations suspense file. `referral-committee`
- **2007-06-01** From committee: Amend, and do pass as amended. (Ayes 12. Noes 5.) (May 31). Read second time and amended. Ordered returned to second reading. `reading-1, reading-2, amendment-introduction, committee-passage, amendment-passage`
- **2007-06-04** Read second time. To third reading. `reading-1, reading-2`
- **2007-06-06** Read third time, passed, and to Senate. (Ayes 45. Noes 34. Page 2005.) `passage, reading-1, reading-3`
- **2007-06-07** In Senate. Read first time. To Standing Committee on Rules for assignment. `reading-1`
- **2007-06-21** Referred to Standing Committee on Environmental Quality. `referral-committee`
- **2007-06-21** From committee chair, with author's amendments: Amend, and re-refer to committee. Read second time, amended, and re-referred to Standing Committee on Environmental Quality. `reading-1, reading-2, amendment-introduction, referral-committee, amendment-passage`
- **2007-06-27** In committee: Set, first hearing. Hearing canceled at the request of author.
- **2007-06-27** From committee chair, with author's amendments: Amend, and re-refer to committee. Read second time, amended, and re-referred to Standing Committee on Environmental Quality. `reading-1, reading-2, amendment-introduction, referral-committee, amendment-passage`
- **2007-07-11** From committee: Do pass, and re-refer to Standing Committee on Appropriations Re-referred. (Ayes 5. Noes 2.) . `committee-passage, committee-passage-favorable, referral-committee`
- **2007-07-23** In committee: Hearing postponed by committee.
- **2007-08-01** From committee chair, with author's amendments: Amend, and re-refer to committee. Read second time, amended, and re-referred to Standing Committee on Appropriations. `reading-1, reading-2, amendment-introduction, referral-committee, amendment-passage`
- **2007-08-20** From committee: Be placed on second reading file pursuant to Senate Rule 28.8 and be amended. `committee-passage, amendment-passage`
- **2007-08-21** Read second time, amended, and to third reading. `reading-1, reading-2, amendment-passage`
- **2007-09-05** Read third time, passed, and to Assembly. (Ayes 21. Noes 15. Page 2302.) `passage, reading-1, reading-3`
- **2007-09-05** In Assembly. Concurrence in Senate amendments pending. May be considered on or after September 7 pursuant to Assembly Rule 77.
- **2007-09-06** Assembly Rule 77 suspended. (Page 2997.)
- **2007-09-06** Senate amendments concurred in. To enrollment. (Ayes 46. Noes 32. Page 3003.) `committee-passage-favorable, amendment-passage`
- **2007-09-11** Enrolled and to the Governor at 7:45 p.m.
- **2007-10-13** Approved by the Governor. `executive-signature`
- **2007-10-13** Chaptered by Secretary of State - Chapter 597, Statutes of 2007.

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/3af95e98-c470-46b4-9f7f-9cc2e0045ddf`. Confidence: reported (aggregated from official California legislature records).