Arizona Grease Trap Requirements & FOG Regulations
FOG Compliance Overview
Arizona follows the International Plumbing Code (IPC) as its base plumbing code. The IPC requires grease interceptors for food service establishments and references sizing based on fixture unit counts and flow rates. The state's regulatory authority is the Arizona Department of Environmental Quality (ADEQ).
With approximately 13,666 food service establishments statewide,Arizona has significant FOG compliance needs. Individual cities and municipalities may adopt additional local ordinances that go beyond the state plumbing code, including stricter pumping schedules, permit requirements, and enforcement penalties. Of the 10 cities we cover, 9 require a dedicated FOG permit. 10 cities enforce the 25% rule for grease trap pumping.
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City Regulations in Arizona
| City | Pumping Frequency | Permit | 25% Rule |
|---|---|---|---|
| Chandler | As needed to prevent FOG discharge exceeding 100 mg/L; ... | Required | Yes |
| Flagstaff | Every 30 days for <100-gal HGI; every 60 days for 100-5... | Required | Yes |
| Gilbert | Per 25% rule; regular maintenance required | Required | Yes |
| Glendale | Regular basis; before FOG/solids exceed 25% | Required | Yes |
| Mesa | Every 90 days or when FOG/solids reach 25% capacity, wh... | Required | Yes |
| Phoenix | Every 90 days minimum; more frequently if grease accumu... | Required | Yes |
| Scottsdale | Regular basis; varies by restaurant size and food volum... | Required | Yes |
| Surprise | Per pretreatment program requirements; typically every ... | Required | Yes |
| Tempe | Every 90 days (quarterly); or when grease/solids reach ... | — | Yes |
| Tucson | Minimum every 90 days (quarterly). Pumping required mor... | Required | Yes |
Frequently Asked Questions
What plumbing code does Arizona follow for grease traps?
Arizona follows the International Plumbing Code (IPC). The IPC requires grease interceptors for food service establishments and sizes them based on fixture unit counts and flow rates. Individual cities may adopt stricter local ordinances.
How many food service establishments are in Arizona?
Arizona has approximately 13,666 food service establishments according to Census Bureau County Business Patterns data. We currently cover detailed FOG regulations for 10 cities in the state.
Do I need a grease trap permit in Arizona?
Permit requirements vary by city. Of the 10 cities we cover in Arizona, 9 require a dedicated FOG permit. Check your specific city's requirements below or contact your local wastewater authority.
What size grease trap do I need in Arizona?
Grease trap sizing in Arizona depends on your establishment's flow rate, number of fixtures, and local code requirements under the IPC. Use our free sizing calculator for a recommendation tailored to your setup.
Last verified: — Regulations change frequently. Always verify current requirements with your local wastewater authority or plumbing inspector before making compliance decisions.