Bolthole Index county-legal census · checked 2026-07-01
Septic permitting in Arizona is handled at the county level — county health departments approve systems in 15 of 15 counties.Every entry below names the approving authority for that county, cited to the authority’s own page.
Septic rules change and some cities run their own programs — treat this as a verified starting point, not legal advice. All states → Arizona water rights & wells → Full Arizona profile →
15 counties · county health departments · permit status scouted for 1
Apache County Public Health Environmental Division
Apache County Environmental Services ↗Cochise County Health Department, Environmental Health Services Division
Cochise County Septic Systems ↗Coconino County Community Development, Environmental Quality Division
Coconino County Environmental Quality ↗Gila County Community Development Division
Gila County Community Development ↗Graham County Department of Health and Human Services, Environmental Health Services (ADEQ-delegated)
Graham County - Permit Requirements for the Installation of Septic Systems ↗Greenlee County Health Department (Community Environmental Health)
Greenlee County - Planning and Zoning ↗La Paz County Community Development Department (ADEQ-delegated environmental program)
La Paz County - Sanitation & Septic ↗Maricopa County Environmental Services Department (ADEQ-delegated)
Maricopa County - Residential Construction (septic via Environmental Services) ↗Mohave County Development Services, Environmental Quality
Mohave County - Septic & Well Permitting ↗Navajo County Planning & Development Services (ADEQ-delegated)
Navajo County Construction Permit Application Instructions ↗Pima County (Development Services / Environmental Quality - Onsite Wastewater)
Pima County - Onsite Wastewater Treatment Facilities ↗Pinal County Air Quality & Environmental Health - Aquifer Protection Division (ADEQ-delegated)
Pinal County - Wells & Septic ↗Santa Cruz County Environmental Health Division
Santa Cruz County Environmental Health ↗Yavapai County Development Services - Environmental Services Unit
Yavapai County Environmental Services Unit - Septic System Construction ↗Yuma County Development Services - Environmental Programs (ADEQ-delegated)
Yuma County - On-Site Wastewater Treatment Facilities (Septic Systems) ↗Every county here has a full profile — its index score, water, land prices, and the rest of its building rules. See the Arizona state page for all counties ranked, or the national septic guide.
General guidance, not legal advice. Off-grid, building, and land-use rules are often set at the county level and change often. Verify with your county and state before acting. Data reviewed 2026-06-26.
