---
type: "Bill"
title: "Amending state greenhouse gas emission limits for consistency with the most recent assessment of climate change science."
description: "Amending state greenhouse gas emission limits for consistency with the most recent assessment of climate change science."
jurisdiction: "us/states/wa"
legislature: "Washington Legislature"
session: "2019-2020"
identifier: "HB 2311"
citation: "Washington HB 2311 (2019-2020)"
classification: ["bill"]
subjects: ["AIR QUALITY AND POLLUTION", "COMMERCE", "DEPARTMENT", "COLLEGES AND UNIVERSITIES", "FOREST LAND", "CLIMATE"]
status: "enacted"
primary_sponsors: ["Slatter"]
version_count: 4
action_count: 52
vote_count: 2
first_action: "2020-01-08"
last_action: "2020-03-19"
source: "openstates"
source_identifier: "ocd-bill/2141cdd6-7201-43c2-b5e2-26b63efe4593"
source_url: "http://apps.leg.wa.gov/billinfo/summary.aspx?bill=2311&year=2019"
source_hash: "2e83c0b238cded82510992a3bd3eddd86cc9e25a817014ed6098a41bd2c5feaa"
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-wa"]
---

# Washington HB 2311 (2019-2020) — Amending state greenhouse gas emission limits for consistency with the most recent assessment of climate change science.

## Version chain

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

1. **Bill** (committee substitute) — [source](http://lawfilesext.leg.wa.gov/Biennium/2019-20/Htm/Bills/House%20Bills/2311.htm)
2. **Engrossed Second Substitute Bill** (committee substitute) — [source](http://lawfilesext.leg.wa.gov/Biennium/2019-20/Htm/Bills/House%20Bills/2311-S2.E.htm)
3. **Second Substitute Bill** (committee substitute) — [source](http://lawfilesext.leg.wa.gov/Biennium/2019-20/Htm/Bills/House%20Bills/2311-S2.htm)
4. **Substitute Bill** (committee substitute) — [source](http://lawfilesext.leg.wa.gov/Biennium/2019-20/Htm/Bills/House%20Bills/2311-S.htm)

## Votes

- 3rd Reading & Final Passage (#15) — **55–41** (pass) · lower
- 3rd Reading & Final Passage (#23) — **28–21** (pass) · upper

## Sponsors

- Slatter — primary (person)
- Bergquist — cosponsor (person)
- Callan — cosponsor (person)
- Chapman — cosponsor (person)
- Cody — cosponsor (person)
- Davis — cosponsor (person)
- Doglio — cosponsor (person)
- Duerr — cosponsor (person)
- Fey — cosponsor (person)
- Fitzgibbon — cosponsor (person)
- Frame — cosponsor (person)
- Goodman — cosponsor (person)
- Hudgins — cosponsor (person)
- Kloba — cosponsor (person)
- Macri — cosponsor (person)
- Ormsby — cosponsor (person)
- Orwall — cosponsor (person)
- Pollet — cosponsor (person)
- Ramel — cosponsor (person)
- Tarleton — cosponsor (person)
- Tharinger — cosponsor (person)
- Valdez — cosponsor (person)
- Wylie — cosponsor (person)

## Timeline

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

- **2020-01-08** Prefiled for introduction. `filing`
- **2020-01-13** First reading, referred to Environment & Energy. `reading-1`
- **2020-01-23** ENVI - Majority; 1st substitute bill be substituted, do pass. `passage`
- **2020-01-23** Minority; do not pass.
- **2020-01-27** Referred to Appropriations.
- **2020-02-08** APP - Majority; 2nd substitute bill be substituted, do pass. `passage`
- **2020-02-08** Minority; do not pass.
- **2020-02-11** Referred to Rules 2 Review.
- **2020-02-14** Rules Committee relieved of further consideration. Placed on second reading.
- **2020-02-16** 2nd substitute bill substituted. `substitution`
- **2020-01-23** ENVI - Majority; 1st substitute bill be substituted, do pass. `passage`
- **2020-01-23** Minority; do not pass.
- **2020-01-27** Referred to Appropriations.
- **2020-02-08** APP - Majority; 2nd substitute bill be substituted, do pass. `passage`
- **2020-02-08** Minority; do not pass.
- **2020-02-11** Referred to Rules 2 Review.
- **2020-02-14** Rules Committee relieved of further consideration. Placed on second reading.
- **2020-02-16** 2nd substitute bill substituted. `substitution`
- **2020-02-08** APP - Majority; 2nd substitute bill be substituted, do pass. `passage`
- **2020-02-08** Minority; do not pass.
- **2020-02-11** Referred to Rules 2 Review.
- **2020-02-14** Rules Committee relieved of further consideration. Placed on second reading.
- **2020-02-16** 2nd substitute bill substituted. `substitution`
- **2020-02-16** Floor amendment(s) adopted.
- **2020-02-16** Rules suspended. Placed on Third Reading.
- **2020-02-16** Third reading, passed; yeas, 55; nays, 41; absent, 0; excused, 2. `reading-3`
- **2020-02-18** First reading, referred to Environment, Energy & Technology. `reading-1`
- **2020-02-25** ENET - Majority; do pass.
- **2020-02-25** And refer to Ways & Means. `referral-committee`
- **2020-02-25** Minority; do not pass.
- **2020-02-25** Minority; without recommendation.
- **2020-02-26** Referred to Ways & Means.
- **2020-03-02** WM - Majority; do pass.
- **2020-03-02** Minority; do not pass.
- **2020-03-02** Passed to Rules Committee for second reading.
- **2020-03-04** Placed on second reading by Rules Committee.
- **2020-03-05** Rules suspended. Placed on Third Reading.
- **2020-03-05** Third reading, passed; yeas, 28; nays, 21; absent, 0; excused, 0. `reading-3`
- **2020-03-07** Speaker signed. `passage`
- **2020-03-10** President signed. `passage`
- **2020-03-11** Delivered to Governor.
- **2020-03-19** Governor signed. `executive-signature`
- **2020-03-19** Chapter 79, 2020 Laws. `became-law`
- **2020-03-19** Effective date 6/11/2020. `became-law`
- **2020-01-14T20:30:00+00:00** Scheduled for public hearing in the House Committee on Environment & Energy at 03:30 PM
- **2020-01-23T13:00:00+00:00** Scheduled for public hearing in the House Committee on Environment & Energy at 08:00 AM
- **2020-02-03T20:30:00+00:00** Scheduled for public hearing in the House Committee on Appropriations at 03:30 PM
- **2020-02-08T14:00:00+00:00** Scheduled for public hearing in the House Committee on Appropriations at 09:00 AM
- **2020-02-20T15:00:00+00:00** Scheduled for public hearing in the Senate Committee on Environment, Energy & Technology at 10:00 AM
- **2020-02-25T15:00:00+00:00** Scheduled for public hearing in the Senate Committee on Environment, Energy & Technology at 10:00 AM
- **2020-02-28T20:30:00+00:00** Scheduled for public hearing in the Senate Committee on Ways & Means at 03:30 PM
- **2020-03-02T15:00:00+00:00** Scheduled for public hearing in the Senate Committee on Ways & Means at 10:00 AM

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/2141cdd6-7201-43c2-b5e2-26b63efe4593`. Confidence: reported (aggregated from official Washington legislature records).