Middlesex County, MA septic permits and regulations

Septic systems in Middlesex County, Massachusetts are permitted by Middlesex County Health Department under 310 CMR 15.000 (Title 5).

Septic permit program

  • Program type: Mixed
  • Authorized agent: Middlesex County Health Department
  • Own septic program: No, uses Massachusetts state rules
  • Local rules beyond the state: No
  • Population: 1,632,002

Permit fee comparison

Average septic permit fee in Middlesex County: $234. Massachusetts average: $231.

Local rules

County operates under state-level 310 CMR 15.00 (Title 5). Contact local health department for any additional county-specific requirements.

What SepticPro has on file for Middlesex County

  • 23 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

Create a free account to see the full details.

Draw a permit-ready site plan for Middlesex County

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

Other Massachusetts counties

Data checked 2026-03-16. Always confirm requirements with Middlesex County Health Department before applying.