Regulations for the Control of Ionizing Radiation (COMAR

COMAR 26.12.01 

COMAR includes the "Regulations for the Control of Ionizing Radiation (1994)", which is incorporated by reference. The purpose of these regulations is to protect the public and the environment from the hazards associated with ionizing radiation. The regulation includes provisions which regulate the use and possession of radioactive materials and radiation producing machines within the state. Applicable Parts of these regulations must be maintained on-site by radiation machine facilities and radioactive material licensees.

Please be informed: The Maryland Department of the Environment (MDE) is proposing to amend Regulation .01 under Radiation Management chapter COMAR 26.12.01 “Radiation Protection,” and will hold a public comment period.

The purpose of this action is to amend COMAR Incorporation by Reference, to incorporate Supplement 33, with the following: (a) Address the public comments submitted for Supplement 32 and (b) make miscellaneous edits regarding formatting and punctuation.

The full text of the proposed regulatory amendments will appear in the Maryland Register, on May 05, 2023. The proposed changes to Supplement 33 are available on the MDE Website.  

View the unofficial C​OMAR incorporated regulations here. This link includes proposed changes to COMAR when applicable.

Deadline for Comments: June 05, 2023, 5:00 pm
Comments may be mailed or emailed to the address below. Comments may be as detailed as necessary. For more information or to submit comments, please contact:

Shannon Page 
Division Chief, Radiological Health Program 
Air and Radiation Administration 
Maryland Department of the Environment
1800 Washington Boulevard, Suite 750 
Baltimore, Maryland 21230 

COMAR 26.12.02 and 26.12.03

Additional radiation control regulations include COMAR 26.12.02 and 26.12.03. COMAR 26.12.02, Inspection and Certification, includes requirements for State Certification of Radiation Machines, Licensing of Inspectors, and Inspection Procedures. COMAR 26.12.03, State Radiation Control Fund, includes required fees, a fee schedule, and the Consumer Price Index adjustment. A link to the official COMAR text of these regulations may be found below under Additional Links.

Contact Info

For additional information contact:

Ms. Shannon Page (Radiation Machines Division) at 410-537-3193 or email

Mr. Atnatiwos Meshesha (Radioactive Materials Division) at 410-537-3300 or email​

Additional Links



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