MDE Numbers to Know

Emergency Numbers

To report ​an environmental emergency, please call (866) 633-4686.
Concern​ Days Nights/
Air Pollution Violations 410-537-3215 866-MDE GO TO
Fish Kills and Algae Blooms 800-285-8195 866-MDE GO TO
Hazardous Material & Oil Spills 866-633-4686 866-MDE GO TO
Mining 410-537-3557 866-MDE GO TO
Public Sewer Leaks/Overflows 410-537-3510 866-MDE GO TO
Public Water Supply Problems 410-537-3706 866-MDE GO TO
Radiation Accidents or Safety Violations 410-537-3300 866-MDE GO TO
Sediment, Wetland 410-537-3510 866-MDE GO TO
Underground Tank Leaks 410-537-3442 866-MDE GO TO

Air and Radiation Administration

Director 410-537-3255
Air Quality Compliance 410-537-4225
Ambient Air Monitoring 410-537-3280
Air Quality Permit 410-537-3230
Air Quality Planning 410-537-4219
Asbestos 410-537-3200
Climate Change 410-537-3094
Mobile Sources 410-537-3270
Radiological Health 410-537-3300

Land and Materials Administration

Director 410-537-3304
Animal Feeding Operations (CAFOs and MAFOs) 410-537-3314
Hazardous and Medical Waste Information 410-537-3314
Lead Poisoning Prevention, 1-800-776-2706 410-537-4199
Mine Operations Permitting (Coal) 301-689-1440
Oil Control 410-537-3442
Recycling 410-537-3314
Scrap Tire Licensing 410-537-3314
Solid Waste, Scrap Tire and Sewage Sludge Complaints 410-537-3315
Sewage Sludge Permits 410-537-3314
Solid Waste Permits 410-537-3315
Brownfields/Voluntary Cleanup 410-537-3437
Community Right to Know Information 410-537-3800

Water and Science Administration

Director 410-537-3567
Financial Assistance Programs 410-537-3574
Individual Wells 410-537-3784
Inspection and Compliance

Sediment, Stormwater & Dam Safety Program 410-537-3543
Water Supply Program 410-537-3702
Sewage Disposal Systems 410-537-3778
Wastewater Permit Program 410-537-3599
Wetland Permitting
Regulatory Services 1-800-876-0200
TMDL 410-537-3902
Public Bathing Beaches 410-537-3906
Environmental Assessment & Standards Program 410-537-3906
Shellfish Waters 410-537-3906
Water Quality Monitoring 443-482-2700
See:WSA Numbers To Know



24-Hour Information​

Daily Air Quality Report (Recording) 410-537-3247
Shellfish Waters: Information onConditional Re​​strictions (Recording) 800-541-1210

General Numbers

Toll Free
Environmental Justice Program 410-537-3471
Minority Business Enterprise Program 410-537-3964
Office of Communications 410-537-3003
Public Information Act Requests 410-537-4120

MDE Field Offices

Central Maryland

Western Maryland

Eastern Shore


County Health Services

County Daytime Nightime
Allegany 301-759-5040  
Anne Arundel 410-222-7050  
Baltimore City 410-396-4422 410-396-3100
Baltimore County 410-887-3733  
Calvert 410-535-3922  
Calvert - (D.C. Area) 301-855-1557  
Caroline 410-479-8045  
Carroll 410-876-1884  
Cecil 410-996-5160  
Charles 301-609-6900  
Dorchester 410-228-1167  
Frederick 301-600-1719  
Garrett 301-334-7760 301-334-1929
Harford 443-643-0300 410-838-6600
Howard (Main Office) 410-313-2640  
Kent 410-778-1350  
Montgomery 240-777-7700  
Prince George's 301-883--5834 301-350-9735
Queen Anne's 410-758-2281  
St. Mary's 301-475-4321  
Somerset 443-523-1730  
Talbot 410-770-6880  
Washington 240-313-3400  
Wicomico 410-546-4446  
Worcester 410-632-1220  


You may also use the MD State Telephone Directory


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