Grease Trap Requirements
Spokane, WA

FOG Compliance in Spokane, WA

Food service establishments in Spokane operate under a combination of federal EPA pretreatment standards, Washington state plumbing code, and city-level FOG ordinances. Together these rules determine how grease traps must be sized, how often they must be pumped, and what happens when a restaurant falls out of compliance. The city has approximately 1,165 food service establishments — every one of them subject to the rules summarized below.

The city follows the Uniform Plumbing Code (UPC) for trap sizing and installation. Under Section 1014, which applies a fixture drainage load formula with a retention time factor, grease interceptors installed in Spokane must meet minimum capacity thresholds based on the fixtures connected to them — 3-compartment sinks, dishwashers, pre-rinse stations, wok stoves, and floor drains on the cook line.

Establishments must maintain pumping logs, hauler manifests, and inspection reports on-site — missing records is itself a violation in most enforcement actions.

Specific pumping schedules and compliance thresholds for Spokane are not published in the municipal code at the level of detail tracked on this site. Restaurant operators in Spokane should contact the local wastewater utility directly to obtain the current rule set before installation or during inspection preparation.

For a deeper explanation of the rules this city enforces, read our guides on how grease traps work and the 25/50 pumping rule.