Choose Language:  English | Español | 中文
Choose Language:  English | Español | 中文
Working with our community to ensure
a safe and healthy environment.

Closure and Inspection Requirements

In accordance with Arizona Administrative Code R18-9-A309(D) and Maricopa County Environmental Health Code Chapter 2, Section 8, a person who permanently discontinues use of or wishes to close an on-site wastewater treatment facility (septic system) or cesspool, or is ordered by the Director to close and abandon a facility shall:

  1. Remove all sewage from the facility and dispose of the sewage in a lawful manner
  2. Disconnect and remove electrical and mechanical components
  3. Cut and plug both ends of the abandoned sewer drain pipe between the building and the on-site wastewater treatment facility not more than five (5) feet outside the building foundation, if practical, or cut and plug as close to each end as possible
  4. Remove or collapse the top of any tank or containment structure using one of the following methods:
    1. Punch a hole in the bottom of the tank or containment structure; fill the tank with material consisting of earth, sand, gravel, concrete or other approved fill material
    2. Remove entire tank and dispose of in a lawful manner; fill the cavity with material consisting of earth, sand, gravel, concrete or other approved fill material
  5. Re-grade the surface to provide drainage away from the closed area
  6. The Department must be notified within 30 days of closure. This requirement is met by submission of the Certification of Closure/Abandonment of an On-Site Wastewater Treatment Facility

Download a Closure/Abandonment packet for detailed instructions and an application.

If an inspection is required at the site for the Closure/Abandonment, request an inspection by phone (602) 506-1787, E-Mail, on-line or fax (602) 506-6925. Have the permit number available when requesting the inspection. Instructions on how to proceed will be provided.


Please contact the Onsite Wastewater Program at with any questions or concerns you may have.