Grease Trap Requirements
Missoula, MT
FOG compliance regulations for food service establishments in Missoula, Montana.
Pumping Requirements
Permits & Enforcement
Complete FOG Regulations
| Pumping Frequency | Every 90 days or when FOG reaches 25% of design capacity, whichever comes first |
|---|---|
| 25% Rule | Yes — trap must be pumped when grease and solids reach 25% of capacity |
| Permit Required | Yes |
| Maximum Fine | 200 |
| Inspections | Routine inspections by WRA; $50 inspection fee |
| Record Keeping | Required — maintain pumping logs and manifests on-site |
| Plumbing Code | Uniform Plumbing Code (UPC) |
| Ordinance Ref. | Missoula City Code Title 20; Ordinance 3442 |
| Authority | Missoula Wastewater Reclamation Authority (WRA) |
Additional Notes
All newly constructed or remodeled FSEs must install a gravity grease interceptor (GGI). Grease removal devices must be maintained by a certified grease hauler. Violations result in fines of $100-$200, civil penalties, required compliance plans, mandated installation of properly sized exterior grease interceptors, and clean-up cost liability. WRA performs routine and compliance inspections.
Regulations change frequently. Always verify current requirements with your local wastewater authority or plumbing inspector before making compliance decisions. Last updated: March 2026.
Contact Information
(406) 552-6600 or brookp@ci.missoula.mt.us
Official Sources
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