Onsite Wastewater (Septic Systems)

Onsite Submittal Packets, Information Sheets and Applications are available. If there is a problem in retrieving any document(s), contact the Onsite Wastewater Systems Program to request assistance.

Aquifer Protection Permit Program


Maricopa County Environmental Services Department (MCESD) Water and Waste Management Division (WWM) receives its authority (PDF) to administer the Aquifer Protection Permit Program, Type 4 General Permits by delegation from the Arizona Department of Environmental Quality (ADEQ). Through this authority, MCESD is responsible for performing:
  • Construction inspections
  • Issuance of approvals to discharge (Discharge Authorization-DA) for OSWTFs in Maricopa County
  • Issuance of permits (Construction Authorization-CA)
  • Plan reviews
  • Site investigations
  • Soil evaluations