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Francis Scott Key Bridge Incident Updates
Watch the Recording of County Executive John A. Olszewski Jr. delivering the Proposed FY25 Budget Message

OSDS Designs Will No Longer Be Provided Starting July 1

Due to recent regulatory changes and instruction from MDE, Baltimore County will be changing its practices for issuance of building permits for properties served by onsite sewage disposal systems (OSDS) and plumbing permits for installing OSDS.

Beginning July 1, the County will no longer be providing OSDS designs, but will provide minimum design criteria. Permit applications to install a new OSDS or repair an existing OSDS must be submitted by a licensed OSDS installer and include a design by a licensed OSDS designer, as well as a site plan showing the proposed OSDS layout.

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The Ground Water Management (GWM) Section is responsible for managing and protecting the ground water resources of Baltimore County. GWM handles issues related to drinking water wells, on-site sewage disposal (septic) systems, removal of residential underground storage tanks, and disposal of solid and hazardous wastes.


Regulations and Policy

The Ground Water Management Section (GWM) is generally responsible for enforcing the Code of Maryland Regulations (COMAR) 26.04. Any person aggrieved by a final decision by GWM pertaining to these regulations may appeal the decision in accordance with the Administrative Procedures Act.

Specific County laws, regulations and policies related to these responsibilities include Section 1.03 of the Code of Baltimore County Regulations (COBAR) as well as the GWM policy manual.


Testing and Investigations


Contractor References

The following are lists of Tank Removal Contractors, Water Testing Laboratories, Septic System Installers, Well Drillers and Asbestos Removal Contractors who are licensed in Baltimore County.

Reference ListDescription
Certified Underground Fuel Storage Tank Removal ContractorsContractors in the Baltimore Metro area who are certified by the Maryland Department of the Environment to remove underground fuel storage tanks.
Certified Water Testing LaboratoriesWater testing laboratories in the Baltimore Metro area. For the purpose of property transfers, water quality tests are valid for 180 days. 
Licensed Septic System Contractors​​​​​​​Excavators and septic systems installers in the Baltimore Metro area.
Licensed Well Drillers and Pump InstallersWell drillers and pump installers in the Baltimore Metro area.
Licensed Contractors to Remove and Encapsulate Asbestos Contractors licensed by Maryland Department of Environment for removing and encapsulating asbestos.

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Contact Us

Ground Water Management

County Office Building
111 West Chesapeake Avenue, Room 305
Towson, Maryland 21204


Monday through Friday
8:30 a.m. to 4:30 p.m.





Horacio Tablada