St. Mary's County, MD septic permits and regulations
Septic systems in St. Mary's County, Maryland are permitted by St. Mary's County Health Department under COMAR 26.04.02.
Septic permit program
- Program type: County Health Department
- Authorized agent: St. Mary's County Health Department
- Own septic program: No, uses Maryland state rules
- Local rules beyond the state: No
- Population: 113,777
Permit fee comparison
Average septic permit fee in St. Mary's County: $60. Maryland average: $60.
Local rules
County operates under state-level COMAR 26.04.02. Contact local health department for any additional county-specific requirements.
What SepticPro has on file for St. Mary's County
- 1 permit fee with sources
- The agency phone, email and office address
- Setback distances
- Soil and perc test requirements
- Allowed system types
- System design rules
- Inspection requirements
- Maintenance and pumping rules
- Point-of-sale rules
- Installer, designer and pumper licensing
Create a free account to see the full details.
Draw a permit-ready site plan for St. Mary's County
Enter the address, draw the system on the aerial with the parcel lines and topo, and print it to scale for St. Mary's County Health Department. See how SepticPro site plans work.
Other Maryland counties
- Allegany County
- Anne Arundel County
- Baltimore County
- Baltimore City County
- Calvert County
- Caroline County
- Carroll County
- Cecil County
- Charles County
- Dorchester County
- Frederick County
- Garrett County
- Harford County
- Howard County
- Kent County
- Montgomery County
- Prince George's County
- Queen Anne's County
- Somerset County
- Talbot County
- Washington County
- Wicomico County
- Worcester County
Data checked 2026-03-16. Always confirm requirements with St. Mary's County Health Department before applying.