St. Clair County, MI septic permits and regulations

Septic systems in St. Clair County, Michigan are permitted by St. Clair County Health Department under Michigan Criteria for Subsurface Sewage Disposal (R 325.1651 et seq.).

Septic permit program

  • Program type: County Health Department
  • Authorized agent: St. Clair County Health Department
  • Own septic program: No, uses Michigan state rules
  • Local rules beyond the state: Yes
  • Population: 160,383

Permit fee comparison

Average septic permit fee in St. Clair County: $63. Michigan average: $335.

Local rules

County operates under state-level MCL 333.12751-12771 (Part 127). Contact local health department for any additional county-specific requirements.

What SepticPro has on file for St. Clair County

  • 2 permit fees 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

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Draw a permit-ready site plan for St. Clair County

Enter the address, draw the system on the aerial with the parcel lines and topo, and print it to scale for St. Clair County Health Department. See how SepticPro site plans work.

Other Michigan counties

Data checked 2026-05-15. Always confirm requirements with St. Clair County Health Department before applying.