Los Angeles vs Seattle
Side-by-side FOG compliance comparison between Los Angeles, CA and Seattle, WA.
| Requirement | Los Angeles, CA | Seattle, WA |
|---|---|---|
| Plumbing Code | UPC (California Plumbing Code based on Uniform Plumbing Code) | UPC (Washington State uses Uniform Plumbing Code) |
| Min. Trap Size | Gravity grease interceptors minimum 750 gallons for food service establishments per LA Municipal Code; hydromechanical grease interceptors minimum 20 GPM (under-sink units); sizing per California Plumbing Code Section 1014.2 based on fixture unit count and flow rate | 1,000 gallons minimum for gravity grease interceptors; hydromechanical interceptors per UPC sizing (typically 20-50 GPM) |
| Pumping Frequency | Minimum every 90 days; more frequently if 25% grease cap rule is triggered | At minimum every 90 days for the first year; frequency may be adjusted based on monitoring records |
| 25% Rule | Yes | Yes |
| Permit Required | Required | Required |
| Permit Fee | Industrial Waste Permit required; fees vary by facility type, typically $200-$800 annually | No separate FOG permit fee; covered under King County Industrial Waste discharge program |
| Max Fine | $25,000 per day per violation under LAMC Section 64.30; criminal penalties up to $1,000/day and/or imprisonment for willful violations | $10,000 per day per violation under Seattle Municipal Code; King County may impose additional penalties |
| Inspections | LA Sanitation conducts periodic inspections; high-risk FSEs inspected annually; routine inspections at minimum every 2-3 years | Annually; King County WTD inspects FSEs on a risk-based schedule |
| Record Keeping | Yes | Yes |
| Authority | LA Bureau of Sanitation, Industrial Waste Management Division | King County Wastewater Treatment Division (WTD) Industrial Waste Program; Seattle Public Utilities (SPU) for local sewer connections |
| Establishments | 23,693 | 6,372 |
Key Differences
As cities in different states, Los Angeles (CA) and Seattle (WA) operate under distinct regulatory frameworks. Here are the most important differences restaurant operators should know:
- Los Angeles follows the Uniform Plumbing Code (UPC), while Seattle uses the Uniform Plumbing Code (UPC). This affects trap sizing calculations and installation standards.
- Pumping schedules differ: Los Angeles requires "Minimum every 90 days", whereas Seattle requires "At minimum every 90 days for the first year".
- Both cities enforce the 25% rule, requiring grease traps to be pumped when grease and solids reach 25% of the trap's capacity.
- Fines differ: Los Angeles penalties can reach $25,000 per day per violation under LAMC Section 64.30; criminal penalties up to $1,000/day and/or imprisonment for willful violations, compared to $10,000 per day per violation under Seattle Municipal Code; King County may impose additional penalties in Seattle.
What This Means for Restaurant Operators
If you operate food service establishments in either city, understanding these regulatory differences is critical for compliance. Permit requirements vary, so check with each city's wastewater authority before opening a new location. Different plumbing codes (UPC (California Plumbing Code based on Uniform Plumbing Code) vs UPC (Washington State uses Uniform Plumbing Code)) mean trap sizing calculations may produce different results for the same kitchen setup. Always verify current requirements directly with your local wastewater authority or plumbing inspector.
Frequently Asked Questions
How do grease trap requirements compare between Los Angeles and Seattle?
Los Angeles follows the Uniform Plumbing Code (UPC), while Seattle uses the Uniform Plumbing Code (UPC). This affects trap sizing calculations and installation standards. Pumping schedules differ: Los Angeles requires "Minimum every 90 days", whereas Seattle requires "At minimum every 90 days for the first year".
Which city has stricter grease trap enforcement, Los Angeles or Seattle?
Enforcement varies: both cities have similar permit requirements. Los Angeles fines: $25,000 per day per violation under LAMC Section 64.30; criminal penalties up to $1,000/day and/or imprisonment for willful violations. Seattle fines: $10,000 per day per violation under Seattle Municipal Code; King County may impose additional penalties. Always verify with local authorities.
How do pumping schedules differ between Los Angeles and Seattle?
Los Angeles: Minimum every 90 days; more frequently if 25% grease cap rule is triggered. Seattle: At minimum every 90 days for the first year; frequency may be adjusted based on monitoring records.
Regulations change frequently. Always verify current requirements with your local wastewater authority or plumbing inspector before making compliance decisions. Last updated: March 2026.
Operating in Both Cities?
Use our sizing calculator to find the right grease trap for each location.
Open Calculator