# Montana HB 291: Revise laws related to air quality standards

Montana HB 291, Revise laws related to air quality standards, is a 69th Legislature, Regular Session (2025) House bill sponsored by Greg Oblander (Republican); status signed, last action 2025-05-05 (Chapter Number Assigned) (as of 2026-10-19).

- Canonical: https://policyrisk.com/state-bill/MT-HB291-2025
- As of: 2026-10-19
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Bill: Montana HB 291
- State: Montana
- Session: 69th Legislature, Regular Session (2025)
- Title: Revise laws related to air quality standards
- Status: signed
- Chamber: House
- Introduced: 2025-01-22
- Last action: 2025-05-05, Chapter Number Assigned
- Sponsor: Greg Oblander (Republican)
- Cosponsors: 2
- Subjects: Environmental Protection, Federal Government, Rule Making
- Touches household money: no
- Roll calls: 5 (282 yes, 116 no in all)
- Economic provisions PRIA read: 3

## Summary

No summary available.

## Bill overview: provisions PRIA read

- State air rules match federal limits: benefit, low. The law stops the department from setting air pollution limits that are stricter than federal rules. Stricter state rules remain only if they were in place before this law or are needed to meet or prevent violations in nonattainment or maintenance areas as approved by the department. The department…
- Local air permit fees stay local: cost, low. Local air programs can collect permit and registration fees. The money goes into a county special revenue fund. Local programs use it to run permitting and registration work. Businesses that need air permits pay these local fees.
- More public input and hearing records: mixed, low. Local air programs must keep an interested-persons list and give at least 30 days notice before changing rules. They must mail proposals, take comments, and hold a hearing if at least 10 directly affected people ask. They must answer comments in writing and tell commenters the final decision. The s…

## Sponsors and cosponsors

- Sponsor: Greg Oblander (Republican), House
- Cosponsor: Brandon Ler (Republican), House
- Cosponsor: Wylie Galt (Republican), Senate

## Roll call votes

| Date | Chamber | Motion | Result | Yes | No | Other |
| --- | --- | --- | --- | --- | --- | --- |
| 2025-04-04 | Senate | Do Concur | pass | 30 | 19 |   |
| 2025-04-03 | Senate | Do Concur | pass | 32 | 18 |   |
| 2025-02-18 | House | Do Pass | pass | 61 | 38 |   |
| 2025-02-12 | House | AMD-HB0291.001.002 Oblander DO PASS | pass | 99 | 1 |   |
| 2025-02-12 | House | Do Pass As Amended | pass | 60 | 40 |   |

## Actions (25)

- 2025-05-05: Chapter Number Assigned (House)
- 2025-05-01: Signed by Governor (House)
- 2025-04-22: Transmitted to Governor (House)
- 2025-04-21: Signed by President (Senate)
- 2025-04-18: Signed by Speaker (House)
- 2025-04-05: Returned from Enrolling (House)
- 2025-04-04: Sent to Enrolling (House)
- 2025-04-04: 3rd Reading (Senate)
- 2025-04-03: 2nd Reading (Senate)
- 2025-04-02: 2nd Reading Pass Consideration (Senate)
- 2025-03-31: Committee Report (Senate)
- 2025-03-28: Committee Executive Action (Senate)
- 2025-03-21: Hearing (Senate)
- 2025-03-01: Referred to Committee (Senate)
- 2025-02-19: 1st Reading (Senate)
- 2025-02-18: Transmitted to Senate (House)
- 2025-02-18: 3rd Reading (House)
- 2025-02-12: 2nd Reading (House)
- 2025-02-12: 2nd Reading Motion to Amend (House)
- 2025-02-10: Committee Report (House)
- 2025-02-07: Committee Executive Action (House)
- 2025-01-29: Hearing (House)
- 2025-01-23: 1st Reading (House)
- 2025-01-23: Referred to Committee (House)
- 2025-01-22: Introduced (House)

## Bill text

- Enrolled, 2025-04-15: [PDF](https://docs.legmt.gov/download-ticket?ticketId=f2a34ce3-4a10-4930-90ab-9635c40473e3)
- As Amended (Version 2), 2025-02-13: [PDF](https://docs.legmt.gov/download-ticket?ticketId=e538227b-9a60-410a-9a88-e61bf5024397)
- Introduced, 2025-01-22: [PDF](https://docs.legmt.gov/download-ticket?ticketId=cb9eb7d2-2c1c-4151-881e-6d26759708e6)

## Related bills

- SB 437: Revise definition of sex in Montana law (signed)
- HB 831: Increase elderly homeowner and renter income tax credit (vetoed)
- HB 628: Revise early literacy targeted intervention laws (vetoed)
- SB 410: Provide for Montana genomic security act (vetoed)
- SB 424: Revising the disabled veteran property tax assistance program (vetoed)
- SB 422: Generally revise laws relating to insurance coverage relating to cancer (vetoed)

## Sources
- [Enrolled (PDF)](https://docs.legmt.gov/download-ticket?ticketId=f2a34ce3-4a10-4930-90ab-9635c40473e3)
- [As Amended (Version 2) (PDF)](https://docs.legmt.gov/download-ticket?ticketId=e538227b-9a60-410a-9a88-e61bf5024397)
- [Introduced (PDF)](https://docs.legmt.gov/download-ticket?ticketId=cb9eb7d2-2c1c-4151-881e-6d26759708e6)

## Related
- [SB 437: Revise definition of sex in Montana law](https://policyrisk.com/state-bill/MT-SB437-2025)
- [HB 831: Increase elderly homeowner and renter income tax credit](https://policyrisk.com/state-bill/MT-HB831-2025)
- [HB 628: Revise early literacy targeted intervention laws](https://policyrisk.com/state-bill/MT-HB628-2025)
- [SB 410: Provide for Montana genomic security act](https://policyrisk.com/state-bill/MT-SB410-2025)
- [SB 424: Revising the disabled veteran property tax assistance program](https://policyrisk.com/state-bill/MT-SB424-2025)
- [SB 422: Generally revise laws relating to insurance coverage relating to cancer](https://policyrisk.com/state-bill/MT-SB422-2025)
- [Montana bills](https://policyrisk.com/states/montana/bills)
- [Montana state hub](https://policyrisk.com/states/montana)
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Source: PRIA, https://policyrisk.com/state-bill/MT-HB291-2025 (as of 2026-10-19).