What happened
The City of Tucson moved to a new set of building codes this year, including the 2024 International Swimming Pool and Spa Code (ISPSC). According to the city’s building codes page, the 2024 codes took effect January 1, 2026, and all permit applications received on or after July 1, 2026 must comply with them. Projects submitted before that date are generally reviewed under the code in effect when they were submitted.
Tucson adopted the pool code with its own local amendments. Two of them matter most for homeowners:
- A cover is required. The city added a section requiring new and remodeled outdoor pools, spas and hot tubs to have a cover that limits evaporation before the final inspection is approved.
- Draining and backwash rules. The amendments point to Pima County’s pool water discharge guidance. Draining onto your own landscaping is allowed only if the water stays on your lot and does not cause erosion. Draining to a curbed street, storm drain or wash is allowed only under similar limits, and discolored, stagnant or contaminated water must be treated at least 72 hours before it is released. Filter backwash must soak in on your property within 24 hours and may not go to the street or a wash.
The amendments also add Arizona’s familiar definition of a pool for the barrier rules: any contained body of water 18 inches or deeper and wider than 8 feet that is meant for swimming.
What this means for your pool
- Budget for a cover. If you are building or remodeling in Tucson, plan for a cover from the start. This is about saving water, not child safety, so it does not replace a barrier. A cover also helps hold heat in spring and fall.
- Remodels count. The cover rule covers remodeled pools too, so ask about it if you are planning a resurfacing or larger renovation that needs a permit.
- Think before you drain. Backwash and draining rules are easy to break by accident. A cartridge filter or a plan for where backwash goes can save headaches.
- Barriers still come first. Arizona’s state law calls for a 5-foot barrier, and that has not changed. Our guide to Arizona pool barrier and fence rules lays out what each local code adds.
What we’re doing
We handle permits and inspections on every project, so the code update is part of our normal process. We plan the cover, equipment layout and backwash setup in the design, and we build every barrier to at least 5 feet. Our Tucson pool permits guide explains the steps, and our block walls and pool fences page shows how we build barriers that look like part of the yard.
Source: City of Tucson Planning & Development Services
Put this story to work
Planning your own project? See our Custom Pool Construction in Tucson, Pool Remodeling & Renovation in Tucson and Block Walls & Pool Barrier Walls in Tucson.
Questions pool owners are asking
Does Tucson require a pool cover?
Yes. Tucson's amendments to the 2024 International Swimming Pool and Spa Code require new and remodeled outdoor pools, spas and hot tubs to have a cover to limit evaporation before final inspection approval. This is an evaporation cover requirement, which is different from a safety cover.
Which pool permits fall under the 2024 code in Tucson?
The 2024 codes took effect January 1, 2026. The city says applications received on or after July 1, 2026 must comply with them, while earlier submittals are generally reviewed under the code in effect when they were submitted.
Can I drain my pool into the street in Tucson?
Only in limited cases. The city's amendments point to Pima County's discharge guidance, which allows draining onto your own landscaping or to a curbed street, storm drain or wash only if the water stays off neighbors' property, causes no erosion and is not harmful. Filter backwash must stay on your property and may not go to streets or washes.
This is our summary and commentary. Read the original story at City of Tucson Planning & Development Services.