What are the grease trap requirements in Stockton, CA?

Food service establishments in Stockton must install and maintain grease traps or interceptors per local FOG ordinances. The city follows the Uniform Plumbing Code (UPC).

Do I need a grease trap permit in Stockton?

Yes, a FOG permit is required in Stockton.

What size grease trap do I need for my restaurant in Stockton?

Grease trap sizing depends on your establishment's flow rate, number of fixtures, and local code requirements. Per California Plumbing Code; minimum two compartments required. Access manholes minimum 24-inch diameter over each chamber.. Use our free sizing calculator for a recommendation.

Grease Trap Requirements
Stockton, CA

FOG compliance regulations for food service establishments in Stockton, California.

Every 3 months or when combine

Pumping Freq.

Required

Permit

Yes

25% Rule

UPC

Code Base

Pumping Requirements

Frequency Every 3 months or when combined FOG and solids reach 25% of design hydraulic depth, whichever comes first

25% Rule Applies

Permits & Enforcement

Permit Required Required

Max Fine Violations are misdemeanors per SMC 1.08.010; administrative civil penalties per Title 1

Complete FOG Regulations

Minimum Trap Size	Per California Plumbing Code; minimum two compartments required. Access manholes minimum 24-inch diameter over each chamber.
Pumping Frequency	Every 3 months or when combined FOG and solids reach 25% of design hydraulic depth, whichever comes first
25% Rule	Yes — trap must be pumped when grease and solids reach 25% of capacity
Permit Required	Yes
Maximum Fine	Violations are misdemeanors per SMC 1.08.010; administrative civil penalties per Title 1
Inspections	Inspections by Director or enforcement officer; documentation must be available on request
Record Keeping	Required — maintain pumping logs and manifests on-site
Plumbing Code	Uniform Plumbing Code (UPC)
Ordinance Ref.	Stockton Municipal Code Title 13, Chapter 13.40 (Articles I and II, Section 13.40.100)
Authority	City of Stockton Municipal Utilities Department

Additional Notes

All grease interceptors must have grease retention fittings; non-compliant interceptors must be retrofitted. Food grinders are prohibited; existing ones must be removed within 180 days. FSEs and property owners are responsible for all city monitoring and enforcement costs. Fully pumped out and cleaned means removal of all contents including FOG, wastewater, and solids.

Regulations change frequently. Always verify current requirements with your local wastewater authority or plumbing inspector before making compliance decisions. Last updated: March 2026.