Knox County, ME septic permits and regulations

Septic systems in Knox County, Maine are permitted by Knox County - Municipal Plumbing Inspectors under 10-144 CMR Chapter 241.

Septic permit program

  • Program type: Mixed
  • Authorized agent: Knox County Health Department
  • Own septic program: No, uses Maine state rules
  • Local rules beyond the state: No
  • Population: 40,607

Permit fee comparison

Average septic permit fee in Knox County: $191. Maine average: $191.

Local rules

County operates under state-level CMR 10-144 Chapter 241 (Subsurface Wastewater Disposal Rules). Contact local health department for any additional county-specific requirements.

What SepticPro has on file for Knox County

  • 17 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 Knox County

Enter the address, draw the system on the aerial with the parcel lines and topo, and print it to scale for Knox County - Municipal Plumbing Inspectors. See how SepticPro site plans work.

Other Maine counties

Data checked 2026-03-16. Always confirm requirements with Knox County - Municipal Plumbing Inspectors before applying.