# 2026-12792: Coal Mines May Shed Diesel Rules in Regulatory Cleanup

2026-12792, Improving and Eliminating Regulations; Diesel Particulate Matter Emission Limits in Underground Coal Mines, is a Federal Register rule from Labor Department, Mine Safety and Health Administration published 2026-06-25, effective 2026-07-27; PRIA reads it as touching household money (as of 2026-10-28).

- Canonical: https://policyrisk.com/federal-register/2026-12792
- As of: 2026-10-28
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Document number: 2026-12792
- Title: Improving and Eliminating Regulations; Diesel Particulate Matter Emission Limits in Underground Coal Mines
- Type: Rule
- Agencies: Labor Department; Mine Safety and Health Administration
- Citation: 91 FR 38280
- Published: 2026-06-25
- Effective: 2026-07-27
- Comments close: not stated
- Significant: no
- Touches household money: yes
- Regulation identifier numbers: 1219-AC05
- Last updated: 2026-10-28

## In one line

Coal Mines May Shed Diesel Rules in Regulatory Cleanup

## Summary

Starting July 27, 2026, underground coal mines will no longer have to follow old diesel pollution rules that are outdated and no longer needed. This change affects mine operators by cutting unnecessary red tape without lowering safety or air quality for miners. It’s a smart cleanup that saves time and keeps things running smoothly underground!

## Abstract

MSHA is eliminating outdated requirements for diesel particulate matter (DPM) emission limits for permissible diesel-powered equipment and non-permissible heavy-duty diesel-powered equipment operated in underground coal mines. These requirements are being removed from MSHA's regulations because they contain outdated effective dates that are no longer applicable.

## Effects PRIA read

- Outdated DPM Compliance Dates Removed: benefit, low. Starting July 27, 2026, MSHA removes outdated compliance-date provisions in 30 CFR 72.500(a), 72.501(a), and 72.501(b). This change is described as cutting regulatory red tape for underground coal mine operators and streamlining requirements without changing the current emission limits.
- DPM Emission Limits Remain at 2.5 g/hr: benefit, low. The rule keeps the diesel particulate matter (DPM) emission limit at 2.5 grams per hour for both permissible diesel-powered equipment (Sec. 72.500(b)) and nonpermissible heavy-duty diesel equipment, generators, and compressors (Sec. 72.501(c)) used underground. MSHA says these limits remain in forc…

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## Sources
- [2026-12792 on federalregister.gov](https://www.federalregister.gov/documents/2026/06/25/2026-12792/improving-and-eliminating-regulations-diesel-particulate-matter-emission-limits-in-underground-coal)
- [2026-12792 as published (PDF)](https://www.govinfo.gov/content/pkg/FR-2026-06-25/pdf/2026-12792.pdf)

## Related
- [Previous: 2026-12787, Financial Data Transparency Act Joint Data Standards](https://policyrisk.com/federal-register/2026-12787)
- [Next: 2026-12793, Improving and Eliminating Regulations; Approved Conveyor Belts in Underground C…](https://policyrisk.com/federal-register/2026-12793)
- [All Federal Register documents](https://policyrisk.com/federal-register)

Source: PRIA, https://policyrisk.com/federal-register/2026-12792 (as of 2026-10-28).