Maricopa County, AZ septic permits and regulations

Septic systems in Maricopa County, Arizona are permitted by Maricopa County Environmental Services Department under Arizona Administrative Code Title 18, Chapter 9, Article 3 (R18-9-A301 et seq.).

Septic permit program

  • Program type: County Health Department
  • Authorized agent: Maricopa County Health Department
  • Own septic program: No, uses Arizona state rules
  • Local rules beyond the state: No
  • Population: 4,420,568

Permit fee comparison

Average septic permit fee in Maricopa County: $390. Arizona average: $265.

Local rules

Updated 2026-05-10 after official-site audit. Permit Center launched June 2024; Environmental Services / Water & Waste Management Division handles onsite wastewater permitting.

What SepticPro has on file for Maricopa County

  • 21 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 Maricopa County

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

Other Arizona counties

Data checked 2026-03-16. Always confirm requirements with Maricopa County Environmental Services Department before applying.