AAC R18-9-A316: Septic Inspection When a Property Transfers

The full title of R18-9-A316 is "Transfer of Ownership Inspection for On-site Wastewater Treatment Facilities." An on-site wastewater treatment facility is the technical name for a septic system or a similar system that treats sewage on the property.

The rule sets three main steps.

• A qualified inspector must inspect the system "within six months before the date of property transfer."
• The inspector completes a state-approved Report of Inspection. It covers "the physical and operational condition of the on-site wastewater treatment facility" and notes whether the tank was pumped or serviced.
• The buyer files a Notice of Transfer "within 15 calendar days after the property transfer."

The seller must hand the buyer the completed Report of Inspection before the transfer, along with any permit and maintenance records the seller has.

Not just anyone. The inspector needs real knowledge of the system type and a certificate of training the state recognizes. R18-9-A316 accepts several kinds of professionals. These include an Arizona-registered engineer, a sanitarian, a certified septic (human excreta) pumper truck operator, a licensed contractor in the right classification, or a certified wastewater treatment plant operator. So the inspection is a specialist job, not a task for a general home inspector.

The state rule is enforced locally. In Maricopa County, the county's Environmental Services division handles it. The buyer files the Notice of Transfer through the county's permit center. The county charges a $50 fee per parcel.

There is one split to know. For systems finished before January 1, 2001, the notice goes to the state (ADEQ). For systems built after that date, it goes to the delegated local agency, which in this region is the county. Fees and the exact filing steps can vary by county, so confirm the details where the property sits.

If you are selling, schedule the inspection so it lands within the six-month window before closing. Order it early, since a failed or missing inspection can delay the sale. Fix or disclose problems the report finds.

If you are buying, read the Report of Inspection closely before you sign. Then file the Notice of Transfer within 15 days and pay the fee. This state inspection is not the same as a voluntary sewer scope or a general home inspection, so you may still want those. See septic inspection when buying a home in Arizona and should I get a sewer scope before buying a home. If the system must be built or replaced, that falls under the conventional septic general permit (R18-9-E302). If the property uses graywater, our page on the Type 1 graywater permit explains a related on-site rule.

R18-9-A316 is part of the Arizona Administrative Code, a public record of state rules. Read the current text on the Cornell Legal Information Institute mirror: Ariz. Admin. Code R18-9-A316. The state program is described by ADEQ, and local steps for this area are posted by Maricopa County. This page is general information, not legal or compliance advice. Confirm the current rule and your county's steps before you rely on them.