How often do grease traps have to be pumped in Phoenix, AZ?

Pump at least every 90 days; before grease + solids reach 25% of depth/capacity. Source: City of Phoenix Water Services Department, checked 2026-10-17. Rules change; confirm with the local sewer authority.

States / Arizona / Phoenix

Phoenix, AZ grease trap & interceptor requirements

Program run by City of Phoenix Water Services Department. Hand-checked against source Last checked 2026-10-17. Report an error / rule changed

Quick answer

How often to pump: At least every 90 days; before grease + solids reach 25% of depth/capacity
Interceptor minimum / sizing: not stated in the sources we checked
Permit / fees: not stated in the sources we checked

From the official source(s) below, last checked 2026-10-17. Rules change; verify with your city.

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: “If the FOG and solids occupy greater than 25% of the interceptor’s capacity, the FSE is required to perform a full cleaning of the interceptor.”
Sizing rule	The FOG BMP manual states: “The minimum size allowed in the City of Phoenix is 500 gallons.” ✓ checked against source
Pumping / cleaning frequency	A full cleaning is required when FOG and solids occupy more than 25% of the interceptor's capacity; no hydromechanical interceptor may go more than 90 days without maintenance. ✓ checked against source
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 “THE KITCHEN AREA The inspector will document how many grease bearing fixtures are in the facility.”
Record keeping	Not stated in the sources we checked
Pumper / hauler approval	Cleaning must be performed by a licensed pumper. ✓ checked against source
Reporting portal	Not stated in the sources we checked
Fines & penalties	Not stated in the sources we checked
Program contact	602-534-6502

Sources

https://www.phoenix.gov/content/dam/phoenix/waterservicessite/documents/FOG_BMP_Manual_2024_06.pdf · checked 2026-10-17
https://www.phoenix.gov/administration/departments/waterservices/environmental-excellence/commercial-compliance/commercial-inspection-fat-oil-grease.html · checked 2026-10-17

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