U.S. FEDRegulation
EPA makes Maryland NOx limits for Montgomery County and Baltimore waste combustors federally enforceable
EPA approved Maryland's NOx limits for large municipal waste combustors, COMAR 26.11.08.10, into the state's Clean Air Act implementation plan, making them federally enforceable from November 9, 2026. The Montgomery County Resource Recovery Facility must meet 140 ppmv on a 24-hour average and 105 ppmv over 30 days, and Wheelabrator Baltimore 150 and 145 ppmv, with continuous monitoring and quarterly reports.
Key points
- COMAR 26.11.08.10 applies to municipal waste combustors burning more than 250 tons a day; limits are corrected to 7% oxygen.Federal Register
- Montgomery County Resource Recovery Facility: 140 ppmv 24-hour block average, 105 ppmv 30-day rolling average, 202 lbs/hr during startup or shutdown.Federal Register
- Wheelabrator Baltimore: 150 ppmv 24-hour block average, 145 ppmv 30-day rolling average, 252 lbs/hr during startup or shutdown.Federal Register
- Large combustors must monitor NOx continuously, report quarterly to the Maryland Department of the Environment and limit startups and shutdowns to three hours.Federal Register
- EPA rejected a commenter's request for a limited disapproval that would have required 110 and 105 ppmvd limits.Federal Register
- Final rule 91 FR 64282 (FR Doc. 2026-20635) takes effect November 9, 2026; review petitions are due December 7, 2026.Federal Register
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RegulationU.S.Md.EPA Final Rule: Maryland RACT for Municipal Waste Combustors (2026)EnvironmentalRegulatoryFor practitionersFor governance