Home-sale septic inspections in Maricopa County, Arizona
Maricopa County: The seller of a home with a septic system must hire an inspector. The check must come within six months of the sale. Arizona Administrative Code, Title 18, Chapter 9 — Department of Environmental Quality, Water Pollution Control · checked 2026-09-23
Does Maricopa County require a septic inspection before a sale?
The seller of a home with a septic system must hire an inspector. The check must come within six months of the sale.
Arizona Administrative Code, Title 18, Chapter 9 — Department of Environmental Quality, Water Pollution Control · checked 2026-09-23
Who may inspect a septic system in Maricopa County?
The department inspects the system before it may be used.
This inspection checks a water tightness test on the tank. It also checks an open trench before backfill.
Maricopa County Environmental Services Department — Notice of Intent to Discharge Instructions · checked 2026-09-23
Sources
Each figure on this page has a government source and a checked-on date.
- Maricopa County — Onsite Wastewater Systems, Frequently Asked Questions
- Maricopa County Environmental Services Department — Onsite Wastewater Forms / Applications
- Maricopa County Environmental Services Department — Locations & Hours
- Maricopa County Environmental Health Code, Chapter II Section VIII — Onsite Wastewater Treatment Facilities
- Maricopa County Environmental Health Code, Chapter I — Fee Schedule
- Maricopa County Environmental Services Department — Site Investigation and Soils Evaluation Instructions
- Maricopa County Environmental Services Department — Notice of Intent to Discharge Instructions
- Maricopa County Environmental Services Department — Online Septic Research
- Arizona Administrative Code, Title 18, Chapter 9 — Department of Environmental Quality, Water Pollution Control
- USDA NRCS Soil Data Access (SSURGO)
Verify before you act. Septic rules are set locally and they change. Check anything here before you spend money on it. Call the Maricopa County Environmental Services Department, on 602-506-6666.