Mesa, AZ Water Use Rules: Recycled Water Rules (2026)
Key Facts
- Permit status
- No city plumbing permit needed
- Condition
- Must meet ADEQ Type 1 Permit
- Eligible occupancies
- R-3, R-4, R-5, manufactured homes, RVs
- Conflict rule
- ADEQ requirements govern over city code
- Governing sections
- § 4-1-4(B)(5)(q); § P2910.4.1
Summary
Mesa's plumbing code lets homeowners install a gray water recycling system without a separate plumbing permit, as long as it complies with the Arizona Department of Environmental Quality's Reclaimed Water Type 1 General Permit. Where the city's technical code and ADEQ requirements conflict, ADEQ's standard controls under Section P2910.4.1.
Installation of a gray water system in compliance with Arizona Department of Environmental Quality Reclaimed Water Type 1 General Permit, and minor modifications to the plumbing system necessary to serve the gray water system in R-3, R-4 and R-5 occupancies, manufactured homes, and recreational vehicles where the system serves an individual dwelling unit.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 22).
Full Breakdown
Two provisions in Title 4 govern gray water recycling in Mesa. ' That exemption only covers residential dwelling-unit installations that already satisfy the state ADEQ Type 1 General Permit: it doesn't create an independent city standard for gray water reuse. 1, Conflicts, states that 'No reference to requirements for gray water recycling systems in this appendix or the technical codes shall be construed as allowing installations in violation of Arizona Department of Environmental Quality requirements,' and that ADEQ's rules govern wherever the two sets of requirements conflict.
Together the two sections mean Mesa treats gray water recycling as state-regulated: the city waives its own permit paperwork for qualifying residential systems but defers entirely to ADEQ on design, water-quality, and use standards, and this code describes no separate municipal gray water program or purple-pipe reclaimed water utility.
Violations & Fines
A gray water system installed without meeting the ADEQ Type 1 General Permit doesn't qualify for Mesa's plumbing-permit exemption, so the Building Safety Director can treat it as unpermitted plumbing work requiring a standard permit application and inspection, or removal if it doesn't comply with ADEQ's water-quality and installation requirements referenced in Section P2910.4.1.
Frequently Asked Questions
Do I need a permit to install a gray water system in Mesa?
Does Mesa have its own gray water design standards?
What if my gray water system doesn't meet ADEQ's permit?
Sources & Official References
Other rules in Mesa
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