Air & Radiation Regulations in Development
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Below is a list of air regulations which are in the process of being developed, reviewed, or revised by the Department. Notices of stakeholder meetings and associated materials may be found here .
Last modified 06/23/2025
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| Program | Mobile Sources Control Program | | Regulation Title | Heavy-Duty Low NOx Omnibus | | Purpose | The purpose of this action is to add a new Chapter to incorporate by reference California's Heavy-Duty Low NOx Omnibus regulation in Maryland. | | COMAR | TBD | | Relevant Statutory Deadline | NA | | Target Effective Date | TBD | | Status | Under Development |
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| Program | Air Quality Planning | | Regulation Title | Fugitive Dust Standards | | Purpose | New Regulations to Control Particulate Matter from Coal Handling, Shipment, and Storage Facilities | | COMAR | TBD | | Relevant Statutory Deadline | N/A | | Target Effective Date | TBD | | Status | Under Development |
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| Program | Climate Change Program/Air Quality Planning Program | | Regulation Title | Zero-Emission Heating Equipment Standard | | Purpose | New regulation to set NOx and GHG emissions standards for residential-scale space and water heating equipment manufactured for installation in Maryland | | COMAR | TBD | | Relevant Statutory Deadline | | | Target Effective Date | TBD | | Status | Under Development |
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| Program | Climate Change | | Regulation Title | Clean Heat Standard | | Purpose | New regulation for a market-based performance standard on heating fuel providers to reduce GHG emissions from the buildings sector | | COMAR | TBD | | Relevant Statutory Deadline | | | Target Effective Date | TBD | | Status | Under Development |
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| Program | Mobile Sources Control Program | | Regulation Title | Anti-Tampering to Motor Vehicle Emission Control Devices | | Purpose | Amendments to include definitions and provide clarification to record-keeping requirements for vehicle dealers | | COMAR | 26.11.20.02 | | Relevant Statutory Deadline | | | Target Effective Date | TBD | | Status | Under Development. Anticipate presenting to AQCAC in September 2025. |
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| Program | Air Quality Planning | | Regulation Title | Consumer Products | | Purpose | Amendments to include updates from the Ozone Transport Commission’s (OTC) Phase V Model Rule | | COMAR | 26.11.32 | | Relevant Statutory Deadline | | | Target Effective Date | TBD | | Status | Under Development. Anticipate presenting to AQCAC in December 2025. |
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| Program | Air Quality Planning | | Regulation Title | Air Quality Controls at Gasoline Dispensing Facilities | | Purpose | New regulation to establish vapor controls using alternate hoses, nozzles, and/or vapor processors | | COMAR | 26.11.24.01, 26.11.24.02, 26.11.24.10 | | Relevant Statutory Deadline | | | Target Effective Date | TBD | | Status | Under Development. Anticipate presenting to AQCAC in December 2025. |
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| Program | Radiological Health Program | | Regulation Title | State Radiation Control Fund Amendment | | Purpose | Amendments to 26.12.03 Update fee tables to current year and include the required Consumer Price Index | | COMAR | 26.12.03 | | Relevant Statutory Deadline | | | Target Effective Date | TBD | | Status | Under Development |
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| Number of Air Regulations in Development :8 |
