Colorado Grease Trap Regulations
FOG Compliance Overview
Colorado follows the International Plumbing Code (IPC) as its base plumbing code. The IPC requires grease interceptors for food service establishments and references sizing based on fixture unit counts and flow rates. The state's regulatory authority is the Colorado Department of Public Health & Environment (CDPHE).
With approximately 13,675 food service establishments statewide, Colorado has significant FOG compliance needs. Individual cities and municipalities may adopt additional local ordinances that go beyond the state plumbing code, including stricter pumping schedules, permit requirements, and enforcement penalties. Of the 8 cities we cover, 4 require a dedicated FOG permit. 5 cities enforce the 25% rule for grease trap pumping.
Need a grease trap in Colorado?
Our free calculator uses IPC code requirements to recommend the right size for your establishment.
Size My Grease TrapCity Regulations in Colorado
| City | Pumping Frequency | Permit | 25% Rule |
|---|---|---|---|
| Aurora | Quarterly (every 90 days) or more frequently as needed | Required | Yes |
| Brighton | Every 7 days (monthly) | — | — |
| Colorado Springs | monthly; or when grease/solids reach 25% of capacity | — | Yes |
| Denver | At minimum every 90 days; must pump when FOG and solids... | Required | Yes |
| Estes Park | See details | Required | — |
| Fort Collins | As needed; must pump before FOG/solids exceed 33% of in... | Required | — |
| Grand Junction | Every 90 days (quarterly); or when grease/solids reach ... | — | Yes |
| Lakewood | annual; or when grease/solids reach 25% of capacity | — | Yes |
Frequently Asked Questions
What plumbing code does Colorado follow for grease traps?
Colorado follows the International Plumbing Code (IPC). The IPC requires grease interceptors for food service establishments and sizes them based on fixture unit counts and flow rates. Individual cities may adopt stricter local ordinances.
How many food service establishments are in Colorado?
Colorado has approximately 13,675 food service establishments according to Census Bureau County Business Patterns data. We currently cover detailed FOG regulations for 8 cities in the state.
Do I need a grease trap permit in Colorado?
Permit requirements vary by city. Of the 8 cities we cover in Colorado, 4 require a dedicated FOG permit. Check your specific city's requirements below or contact your local wastewater authority.
What size grease trap do I need in Colorado?
Grease trap sizing in Colorado depends on your establishment's flow rate, number of fixtures, and local code requirements under the IPC. Use our free sizing calculator for a recommendation tailored to your setup.
Regulations change frequently. Always verify current requirements with your local wastewater authority or plumbing inspector before making compliance decisions. Last updated: March 2026.