Classify the proposed graywater sources, daily flow and irrigation design with Arizona’s permitting authority before installation or use. The Type 3 graywater general permit covers qualifying systems outside the residential Type 1 conditions, with flow no more than 3,000 gallons daily. Submit the required notice and design information, and obtain written authorization before operating.
Which reuse category applies to the project?
Do not apply a household graywater shortcut to a business installation without checking its eligibility. Arizona's current administrative rule R18-9-D702 addresses Type 3 graywater reuse where the Type 1 rule does not apply, the flow is no more than 3,000 gallons per day, and the specified notification, design and installation conditions are met. Its stated uses are landscape irrigation and composting.
Identify the actual contributing fixtures and water characteristics. Graywater classification does not turn toilet waste, kitchen wastewater or an unknown commercial process discharge into eligible water. Give the authority enough information to classify the source and flow. A system exceeding the Type 3 flow limit needs a separate permit determination; reducing an estimate without supporting calculations does not establish eligibility.
The residential graywater overview is a different context. Reclaimed water for commercial toilet flushing uses a separate water-quality and direct-reuse framework.
What belongs in the notice and design package?
R18-9-D702 requires a Notice of Intent with applicant contact information, location coordinates, a description of sources and calculations showing the flow limit, design plans, the compliance certification and applicable permit fee. Use ADEQ's current form and confirm the responsible permitting authority before filing.
Have the designer show collection routes, irrigation method, service access and separation from potable water. Identify any existing on-site wastewater system. The rule does not let diverting graywater reduce that system's required design, capacity or reserve area; it must be able to handle the combined blackwater and graywater flow.
Some agency pages retain older rule numbers. Use the current Arizona administrative-code text for the governing provisions, and ask the authority to resolve a form or reference discrepancy. Keep the final approved drawings and authorization together rather than treating a submitted form as permission to operate.
Which operating boundaries remain important?
The rule requires avoiding human contact with graywater and irrigated soil. Application must use the prescribed subsurface or permeable-bed arrangements; spray irrigation and surface standing water are not allowed. Piping susceptible to cross-connection with potable water must clearly indicate that it does not carry potable water.
The applicant may not operate until the Department issues written Recycled Water Authorization. ADEQ's Type 3 program page states a five-year permit term; confirm the actual authorization and renewal requirements for the installation. State reuse authorization also does not settle every local plumbing, building or utility approval. Maintain the accepted operating conditions and records, and seek approval before changing sources or design.