Wyoming Grease Trap Regulations (2026)

By the GreaseTrapFinder Editorial Team · Updated August 24, 2026 · All citations link to official sources

Everything a Wyoming restaurant or commercial kitchen needs to know about grease trap requirements: who regulates it, how often you must clean, what permits and registration you need, what records to keep, and what violations actually cost. Citations link to the official source so you can verify every claim — and show your inspector you did.

Wyoming Requirements at a Glance

Cleaning frequency	No statewide mandate — set by municipal pretreatment programs. Cheyenne's Board of Public Utilities runs a FOG Control Program requiring interceptor maintenance under local ordinance.
State regulator	Wyoming Department of Environmental Quality, Water Quality Division (WYPDES Program)
Governing regulation	Wyoming Pollutant Discharge Elimination System (WYPDES) regulations; EPA Industrial Pretreatment Program (40 CFR Part 403) implemented locally by municipal utilities under DEQ oversight

Who Regulates Grease Traps in Wyoming

At the state level, Wyoming Department of Environmental Quality, Water Quality Division (WYPDES Program) (program page) oversees FOG (fats, oils, and grease) discharge; the governing rule is Wyoming Pollutant Discharge Elimination System (WYPDES) regulations; EPA Industrial Pretreatment Program (40 CFR Part 403) implemented locally by municipal utilities under DEQ oversight. Day-to-day enforcement — inspections, cleaning intervals, fines — usually happens through your city or county sewer utility's pretreatment program, which can set stricter rules than the state.

City Programs in Wyoming

Cities run their own FOG programs and often set stricter rules than the state:

Cheyenne

Program: Cheyenne Board of Public Utilities Industrial Pretreatment / FOG Control Program
Ordinance: Cheyenne BOPU Grease Trap and Interceptor Regulations (adopted Feb 2017); 40 CFR Part 403
Cleaning frequency: Set by local ordinance; food establishments must maintain interceptors and stay enrolled in the BOPU FOG program
Permit: Register/enroll via the SwiftComply/FOGregister digital portal and upload maintenance records
Fines: Unauthorized discharge can suspend hauler dumping privileges up to 30 days (dollar fines not published)

Worth Knowing in Wyoming

Wyoming doesn't run its own standalone state pretreatment approval program — FOG rules are implemented locally under EPA 40 CFR Part 403 with WYPDES oversight. Cheyenne's Board of Public Utilities is the most documented program, using the SwiftComply digital portal for compliance tracking; notably, its treatment facility won't accept grease trap waste, so haulers must arrange approved disposal elsewhere.

Frequently Asked Questions

How often must grease traps be cleaned in Wyoming?

No statewide mandate — set by municipal pretreatment programs. Cheyenne's Board of Public Utilities runs a FOG Control Program requiring interceptor maintenance under local ordinance. Your city's FOG program may require more frequent service — and regardless of the legal interval, clean before fats, oils, and grease reach 25% of trap capacity.

Do I need a permit for a grease trap in Wyoming?

In most Wyoming cities, yes — food service establishments must register with, or get a permit from, the local FOG / pretreatment program before discharging grease trap waste to the sewer. The exact permit and registration requirements vary by city; the major-city programs are listed above, and your local sewer authority has the specifics for your address.

Next Steps

Official Sources

This guide summarizes official sources for general information and is not legal advice. Rules change — confirm requirements with Wyoming Department of Environmental Quality, Water Quality Division (WYPDES Program) and your local FOG program.

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