On-site Septic System

The Environmental Health Division receives applications for the construction or expansion of individual septic systems. When a septic system fails, the staff also reviews applications for repairs.

To learn more about septic systems, click here.

Application Process

St. Mary’s County Health Department
Environmental Health Services
P.O. Box 316
Leonardtown, MD 20650

  • Complete perc testing.
  • Submit site plan by a Maryland registered land surveyor.
  • Begin construction, upon approval.
  • Contact health department to conduct a final inspection of the septic system before tank and fields are covered.

For more information, please contact the health department at smchd.healthdept@maryland.gov or call 301-475-4321.