Middlesex County, NJ septic permits and regulations

Septic systems in Middlesex County, New Jersey are permitted by Middlesex County Office of Health Services under N.J.A.C. 7:9A.

Septic permit program

  • Program type: County Health Department
  • Authorized agent: Middlesex County Health Department
  • Own septic program: No, uses New Jersey state rules
  • Local rules beyond the state: No
  • Population: 863,162

Permit fee comparison

Average septic permit fee in Middlesex County: $250. New Jersey average: $242.

Local rules

County operates under state-level NJAC 7:9A. Contact local health department for any additional county-specific requirements.

What SepticPro has on file for Middlesex County

  • 22 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 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 Office of Health Services. See how SepticPro site plans work.

Other New Jersey counties

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