What are the grease trap requirements in Hayward, CA?

Food service establishments in Hayward 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 Hayward?

Yes, a FOG permit is required in Hayward. Fee: Unknown - contact Clean Water Program at 510-881-7900.

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

Grease trap sizing depends on your establishment's flow rate, number of fixtures, and local code requirements. Per California Plumbing Code sizing requirements. Use our free sizing calculator for a recommendation.

Grease Trap Requirements
Hayward, CA

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

Per 25% rule and wastewater di

Pumping Freq.

Required

Permit

Yes

25% Rule

UPC

Code Base

Pumping Requirements

Frequency Per 25% rule and wastewater discharge permit conditions

25% Rule Applies

Permits & Enforcement

Permit Required Required

Permit Fee Unknown - contact Clean Water Program at 510-881-7900

Max Fine Unknown - enforcement per municipal code

Complete FOG Regulations

Minimum Trap Size	Per California Plumbing Code sizing requirements
Pumping Frequency	Per 25% rule and wastewater discharge permit conditions
25% Rule	Yes — trap must be pumped when grease and solids reach 25% of capacity
Permit Required	Yes
Permit Fee	Unknown - contact Clean Water Program at 510-881-7900
Maximum Fine	Unknown - enforcement per municipal code
Inspections	Annual minimum (at least once per year with minimum 2 samples per year)
Record Keeping	Required — maintain pumping logs and manifests on-site
Plumbing Code	Uniform Plumbing Code (UPC)
Ordinance Ref.	Hayward Municipal Code Chapter 5, Article 7 (Sanitation and Health / Control of Industrial Pretreatment)
Authority	City of Hayward Clean Water Program / Water Pollution Control Facility

Additional Notes

Wastewater Discharge Permit Application required. Water Pollution Source Control Inspectors conduct annual inspections with minimum 2 samples per year. Businesses with pollutants of concern must have permits. Contact Clean Water Program at 510-881-7900.

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