---
type: "Bill"
title: "Pollution Protection Measures"
description: "Section 2 of the act creates the legislative interim committee on ozone air quality (committee) to study ozone air quality in the state. The committee consists of 6 members of the senate and 6 members of the house of representatives. The committee may meet up to 6 times during the 2023 interim."
jurisdiction: "us/states/co"
legislature: "Colorado General Assembly"
session: "2023A"
identifier: "HB 23-1294"
citation: "Colorado HB 23-1294 (2023A)"
classification: ["bill"]
subjects: []
status: "enacted"
primary_sponsors: ["Faith Winter", "Jennifer Bacon", "Jenny Willford", "Julie Gonzales"]
version_count: 10
action_count: 17
vote_count: 4
first_action: "2023-04-13T06:00:00+00:00"
last_action: "2023-06-06T06:00:00+00:00"
source: "openstates"
source_identifier: "ocd-bill/7ef83764-c535-4589-8b60-f4e2a7d7facf"
source_url: "https://leg.colorado.gov/bills/hb23-1294"
source_hash: "e2cae1666ad2a9c3297cf67825688f1c65d9b0840cce641bb5301aa39882ae31"
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-co"]
---

# Colorado HB 23-1294 (2023A) — Pollution Protection Measures

Section 2 of the act creates the legislative interim committee on ozone air quality (committee) to study ozone air quality in the state. The committee consists of 6 members of the senate and 6 members of the house of representatives. The committee may meet up to 6 times during the 2023 interim.

## Version chain

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

1. **Committee Amendment** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/2023a_hb1294_s_app_004.pdf)
2. **Engrossed (04/29/2023)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2023A/bills/2023a_1294_eng.pdf)
3. **Final Act (05/22/2023)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2023A/bills/2023a_1294_enr.pdf)
4. **Introduced (04/13/2023)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2023A/bills/2023a_1294_01.pdf)
5. **PA1 (04/21/2023)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2023A/bills/2023a_1294_h_ene_01.pdf)
6. **PA2 (04/28/2023)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2023A/bills/2023a_1294_h_ene_app_01.pdf)
7. **Reengrossed (05/01/2023)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2023A/bills/2023a_1294_ren.pdf)
8. **Rerevised (05/08/2023)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2023A/bills/2023a_1294_rer.pdf)
9. **Revised (05/07/2023)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/documents/2023A/bills/2023a_1294_rev.pdf)
10. **Signed Act (06/06/2023)** (committee substitute) — [source](https://leg.colorado.gov/sites/default/files/2023a_1294_signed.pdf)

## Votes

- BILL — **23–12** (pass) · upper
- BILL — **42–20** (pass) · lower
- REPASS — **44–19** (pass) · lower
- CONCUR — **42–18** (pass) · lower

## Sponsors

- Faith Winter — primary (person)
- Jennifer Bacon — primary (person)
- Jenny Willford — primary (person)
- Julie Gonzales — primary (person)

## Timeline

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

- **2023-06-06T06:00:00+00:00** Governor Signed `executive-signature`
- **2023-05-22T06:00:00+00:00** Sent to the Governor `executive-receipt`
- **2023-05-22T06:00:00+00:00** Signed by the President of the Senate
- **2023-05-22T06:00:00+00:00** Signed by the Speaker of the House
- **2023-05-08T06:00:00+00:00** House Considered Senate Amendments - Result was to Concur - Repass
- **2023-05-08T06:00:00+00:00** Senate Third Reading Passed - No Amendments `passage, reading-3`
- **2023-05-07T06:00:00+00:00** Senate Second Reading Special Order - Passed with Amendments - Floor
- **2023-05-06T06:00:00+00:00** Senate Second Reading Senate Second Reading Special Order - Laid Over Daily - No Amendments
- **2023-05-06T06:00:00+00:00** Senate Committee on Appropriations Refer Unamended to Senate Committee of the Whole `committee-passage, referral-committee`
- **2023-05-05T06:00:00+00:00** Senate Committee on Transportation & Energy Refer Unamended to Appropriations `referral-committee`
- **2023-05-01T06:00:00+00:00** Introduced In Senate - Assigned to Transportation & Energy `introduction`
- **2023-05-01T06:00:00+00:00** House Third Reading Passed - No Amendments `passage, reading-3`
- **2023-04-29T06:00:00+00:00** House Second Reading Special Order - Passed with Amendments - Committee, Floor
- **2023-04-28T06:00:00+00:00** House Second Reading Special Order - Laid Over Daily - No Amendments
- **2023-04-28T06:00:00+00:00** House Committee on Appropriations Refer Amended to House Committee of the Whole `committee-passage, referral-committee`
- **2023-04-20T06:00:00+00:00** House Committee on Energy & Environment Refer Amended to Appropriations `referral-committee`
- **2023-04-13T06:00:00+00:00** Introduced In House - Assigned to Energy & Environment `introduction`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/7ef83764-c535-4589-8b60-f4e2a7d7facf`. Confidence: reported (aggregated from official Colorado legislature records).