Grease Trap Requirements
Santa Rosa, CA

FOG Compliance in Santa Rosa, CA

Food service establishments in Santa Rosa operate under a combination of federal EPA pretreatment standards, California 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.

Pumping frequency is the compliance rule restaurant owners interact with most often. In Santa Rosa, the rule is: When FOG/solids reach 25% of trap capacity. This aligns with the 90-day US median enforced by most major cities. 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 Santa Rosa 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. The local minimum trap size is: 1,000 gallons minimum if garbage disposal is in use; otherwise per California Plumbing Code (UPC-based).

Santa Rosa requires a dedicated FOG permit for any food service establishment generating fats, oils, and grease. The annual permit fee is Non-Residential Food Service Discharge Permit required — no charge for permit. The permit is separate from, and in addition to, the plumbing permit required at installation. Violations carry maximum penalties of Per city enforcement provisions; contact Environmental Compliance Section at (707) 543-3369 . Fines typically escalate with repeat violations, and severe discharges that cause sanitary sewer overflows can trigger federal Clean Water Act penalties layered on top of local fines.

Santa Rosa enforces the 25 percent rule: grease traps must be pumped before the combined FOG and settled solids reach 25 percent of the trap's total liquid depth. Inspectors measure the depth with a sludge judge or dipstick, typically at surprise visits. Exceeding the threshold at inspection triggers a notice of violation and mandatory emergency pump-out, regardless of the scheduled pumping cycle. Inspections by Environmental Compliance Section; periodic compliance reviews. Establishments must maintain pumping logs, hauler manifests, and inspection reports on-site — missing records is itself a violation in most enforcement actions. Enforcement authority rests with the City of Santa Rosa Utilities Department / Environmental Compliance Section, which handles permit issuance, inspections, and hauler licensing.

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