Coal Mines May Shed Diesel Rules in Regulatory Cleanup
Published Date: 6/25/2026
Rule
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Starting July 27, 2026, underground coal mines will no longer have to follow old diesel pollution rules that are outdated and no longer needed.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!
Analyzed Economic Effects
2 provisions identified: 2 benefits, 0 costs, 0 mixed.
Outdated DPM Compliance Dates Removed
Starting July 27, 2026, MSHA removes outdated compliance-date provisions in 30 CFR 72.500(a), 72.501(a), and 72.501(b).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
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 force and miner protections are not reduced.
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Key Dates
Department and Agencies
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