---
type: "Bill"
title: "Dreissenid mussel infestation prevention: grants."
description: "Existing law requires any person, or federal, state, or local agency, district, or authority that owns or manages a reservoir, as defined, where recreational, boating, or fishing activities are permitted, except a privately owned reservoir that is not open to the public, to assess the vulnerability of the reservoir for the introduction of nonnative dreissenid mussel species and to develop and implement a program designed to prevent the introduction of that species, as prescribed."
jurisdiction: "us/states/ca"
legislature: "California Legislature"
session: "20172018"
identifier: "SB 790"
citation: "California SB 790 (20172018)"
classification: ["bill"]
subjects: ["Dreissenid mussel infestation prevention: grants."]
status: "enacted"
primary_sponsors: ["McGuire"]
version_count: 11
action_count: 39
vote_count: 1
first_action: "2017-02-17"
last_action: "2018-09-19"
source: "openstates"
source_identifier: "ocd-bill/40a381da-4b77-4f72-a372-667726699436"
source_url: "http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=201720180SB790"
source_hash: "8b2c33cfd35f855111fbfc838481593d998ced2a233808563fc6ee00d813a493"
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 790 (20172018) — Dreissenid mussel infestation prevention: grants.

Existing law requires any person, or federal, state, or local agency, district, or authority that owns or manages a reservoir, as defined, where recreational, boating, or fishing activities are permitted, except a privately owned reservoir that is not open to the public, to assess the vulnerability of the reservoir for the introduction of nonnative dreissenid mussel species and to develop and implement a program designed to prevent the introduction of that species, as prescribed.

## Version chain

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

1. **02/17/17 - Introduced** (filed) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201720180SB790&version=20170SB79099INT)
2. **03/29/17 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201720180SB790&version=20170SB79098AMD)
3. **04/17/17 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201720180SB790&version=20170SB79097AMD)
4. **05/02/17 - Amended Senate** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201720180SB790&version=20170SB79096AMD)
5. **06/13/17 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201720180SB790&version=20170SB79095AMD)
6. **06/22/17 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201720180SB790&version=20170SB79094AMD)
7. **07/06/17 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201720180SB790&version=20170SB79093AMD)
8. **08/24/18 - Amended Assembly** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201720180SB790&version=20170SB79092AMD)
9. **09/19/18 - Chaptered** (committee substitute) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201720180SB790&version=20170SB79090CHP)
10. **SB790** (committee substitute) — [source](http://leginfo.legislature.ca.gov/faces/billNavClient.xhtml?bill_id=201720180SB790)
11. **09/07/18 - Enrolled** (enrolled) — [source](https://leginfo.legislature.ca.gov/faces/billPdf.xhtml?bill_id=201720180SB790&version=20170SB79091ENR)

## Votes

- SB 790 McGuire Senate Third Reading By LEVINE — **78–1** (pass) · lower

## Sponsors

- McGuire — primary (person)
- Levine — coauthor (person)
- Monning — coauthor (person)
- Wood — coauthor (person)

## Timeline

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

- **2017-02-17** Introduced. Read first time. To Com. on RLS. for assignment. To print. `introduction, reading-1`
- **2017-02-21** From printer. May be acted upon on or after March 23.
- **2017-03-09** Referred to Com. on RLS. `referral-committee`
- **2017-03-29** From committee with author's amendments. Read second time and amended. Re-referred to Com. on RLS. `reading-2, referral-committee, amendment-passage, committee-passage, reading-1`
- **2017-04-05** Re-referred to Com. on HEALTH. `referral-committee`
- **2017-04-07** Set for hearing April 26.
- **2017-04-17** From committee with author's amendments. Read second time and amended. Re-referred to Com. on HEALTH. `reading-2, referral-committee, amendment-passage, committee-passage, reading-1`
- **2017-05-01** From committee: Do pass as amended and re-refer to Com. on APPR. (Ayes 7. Noes 2. Page 887.) (April 26). `committee-passage-favorable, committee-passage, amendment-passage`
- **2017-05-02** Read second time and amended. Re-referred to Com. on APPR. `amendment-passage, reading-2, referral-committee, reading-1`
- **2017-05-04** Set for hearing May 15.
- **2017-05-15** From committee: Be ordered to second reading pursuant to Senate Rule 28.8. `committee-passage, reading-2`
- **2017-05-16** Read second time. Ordered to third reading. `reading-2, reading-1`
- **2017-05-18** Read third time. Passed. (Ayes 23. Noes 13. Page 1107.) Ordered to the Assembly. `reading-3, passage, reading-1`
- **2017-05-18** In Assembly. Read first time. Held at Desk. `reading-1`
- **2017-06-05** Referred to Com. on HEALTH. `referral-committee`
- **2017-06-13** From committee with author's amendments. Read second time and amended. Re-referred to Com. on HEALTH. `reading-2, referral-committee, amendment-passage, committee-passage, reading-1`
- **2017-06-22** From committee with author's amendments. Read second time and amended. Re-referred to Com. on HEALTH. `reading-2, referral-committee, amendment-passage, committee-passage, reading-1`
- **2017-07-05** From committee: Do pass as amended. (Ayes 8. Noes 3.) (June 27). `committee-passage-favorable, committee-passage, amendment-passage`
- **2017-07-06** Read second time and amended. Ordered to second reading. `reading-1, amendment-passage, reading-2`
- **2017-07-10** Read second time. Ordered to third reading. `reading-2, reading-1`
- **2017-09-11** Ordered to inactive file on request of Assembly Member Calderon.
- **2018-08-06** Notice of intention to remove from inactive file given by Assembly Member Calderon.
- **2018-08-07** From inactive file.
- **2018-08-07** Ordered to third reading.
- **2018-08-24** Read third time and amended. `amendment-passage, reading-3, reading-1`
- **2018-08-24** Ordered to third reading.
- **2018-08-24** Re-referred to Com. on W.,P., & W. pursuant to Assembly Rule 77.2. `referral-committee`
- **2018-08-28** Coauthors revised.
- **2018-08-28** From committee: Do pass. (Ayes 14. Noes 0.) (August 28). `committee-passage-favorable, committee-passage`
- **2018-08-29** Read second time. Ordered to third reading. `reading-2, reading-1`
- **2018-08-31** Read third time. Passed. Ordered to the Senate. `reading-3, passage, reading-1`
- **2018-08-31** In Senate. Concurrence in Assembly amendments pending.
- **2018-08-31** Re-referred to Com. on RLS. pursuant to Senate Rule 29.10(d). `referral-committee`
- **2018-08-31** From committee: Be re-referred to Com. on N.R. & W. pursuant to Senate Rule 29.10(d). (Ayes 5. Noes 0. Page 6145.) Re-referred to Com. on N.R. & W. `committee-passage, referral-committee`
- **2018-08-31** From committee: That the Assembly amendments be concurred in. (Ayes 8. Noes 0. Page 6200.) `committee-passage`
- **2018-08-31** Assembly amendments concurred in. (Ayes 39. Noes 0. Page 6173.) Ordered to engrossing and enrolling. `committee-passage-favorable, amendment-passage`
- **2018-09-12** Enrolled and presented to the Governor at 5 p.m.
- **2018-09-19** Approved by the Governor. `executive-signature`
- **2018-09-19** Chaptered by Secretary of State. Chapter 558, Statutes of 2018.

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/40a381da-4b77-4f72-a372-667726699436`. Confidence: reported (aggregated from official California legislature records).