Flagstaff, AZ grease trap & interceptor requirements
Quoted from official source Last checked 2026-10-17. Report an error / rule changed
Quick answer
- How often to pump: At least every 90 days
- Interceptor minimum / sizing: not stated in the sources we checked
- Permit / fees: not stated in the sources we checked
Rules change; verify with your city. Summaries are plain-English restatements of the official source linked below; “Source says” shows the exact wording. Blank rows mean the sources we checked did not state that rule, not that there is no rule.
| Required trap / interceptor type | Source says: “Gravity Grease Interceptors (GGI) Unless otherwise approved, GGIs shall not be installed.” |
|---|---|
| Sizing rule | Source says: “If no maintenance frequency has been set by the City, the following minimum service frequencies shall apply: 5.9 5.8.1 The maximum amount of time between pump outs for a grease interceptor with liquid volume less than 100 gallons shall be no more than 30 days.” |
| Pumping / cleaning frequency | Pump at least every 90 days. Source says“5.8.3 The maximum amount of time between pump outs for a grease interceptor with liquid volume greater than 500 gallons shall be no more than 90 days.” |
| Permit required? | Not stated in the sources we checked |
| Permit & program fees | Not stated in the sources we checked |
| Inspections | Grease traps/interceptors are subject to inspection. Source says“After such inspection, the grease interceptor shall be filled to the level of the top of the ground.” |
| Record keeping | Keep pumping and maintenance records (manifests/logs) available for inspection. Source says“Page 9 Fats, Oils and Grease (FOG) Discharge Control Manual Adopted: 4/20/2021 5.13 Written documentation via a standardized manifest or invoice shall be kept at the FSE premises and/or be readily available for a period of at least two (2) years for inspection by the City.” |
| Pumper / hauler approval | Use an approved / licensed grease hauler. Source says“Decanting or stacking, which involves returning wastewater from a grease hauler truck back into the grease interceptor or directly to the sewer after it has been pumped out, is never permitted;” |
| Reporting portal | Not stated in the sources we checked |
| Fines & penalties | Not stated in the sources we checked |
| Program contact | Not stated in the sources we checked |
Sources
- https://flagstaff.az.gov/DocumentCenter/View/72403/Official-Flagstaff-AZ-FOG-Discharge-Manual?bidId= · checked 2026-10-17
- https://www.flagstaff.az.gov/DocumentCenter/View/70295/GI-waiver · checked 2026-10-17
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