Contact Us

Our Address

The Maryland Department of the Environment is located at 1800 Washington Blvd., Baltimore, Maryland 21230. Its primary number is 410-537-3000. Click here for directions.


For emergency situations such as oil spills or release of pollutants that pose a grave threat to public health and the environment, please call the toll free number (866) 633-4686. You may also refer to the Emergency Numbers.

Ways to Contact Us

For contact information, please refer to the Numbers to KnowCustomer Service DirectoryMDE Locations and the MD State Telephone Directory, or email us at  

Comments and Suggestions

MDE welcomes your comments and suggestions.  If you have comments, suggestions or questions about concerns related to MDE programs and activities, environmental issues, or on Maryland environmental regulations and permits, you may send an email to

Site Problems

​MDE is dedicated to quickly fixing any problems on our website. If an issue is found on this website, such as a missing page or a broken link, send an email to​ specifying the problem you encountered and what page you discovered it on.

Human Trafficking GET HELP

National Human Trafficking Hotline - 24/7 Confidential

1-888-373-7888 233733 More Information on human trafficking in Maryland

Customer Service Promise

The State of Maryland pledges to provide constituents, businesses, customers, and stakeholders with friendly and courteous, timely and responsive, accurate and consistent, accessible and convenient, and truthful and transparent services.

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Help Stop Fraud in State Government

The Maryland General Assembly’s Office of Legislative Audits operates a toll-free fraud hotline to receive allegations of fraud and/or abuse of State government resources. Information reported to the hotline in the past has helped to eliminate certain fraudulent activities and protect State resources.

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