Michigan Grease Trap Regulations
FOG Compliance Overview
Michigan 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 Michigan Department of Environment, Great Lakes & Energy (EGLE).
With approximately 19,760 food service establishments statewide, Michigan 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 6 cities we cover, 3 require a dedicated FOG permit. 4 cities enforce the 25% rule for grease trap pumping.
Need a grease trap in Michigan?
Our free calculator uses IPC code requirements to recommend the right size for your establishment.
Size My Grease TrapCity Regulations in Michigan
| City | Pumping Frequency | Permit | 25% Rule |
|---|---|---|---|
| Ann Arbor | See details | — | Yes |
| Detroit | Every 90 days minimum or more frequently as needed to m... | Required | Yes |
| Grand Rapids | As needed to maintain efficiency; typically 90 days per... | Required | Yes |
| Kalamazoo | See details | — | — |
| Lansing | See details | — | — |
| Ypsilanti | Gravity grease interceptors: quarterly minimum; Hydrome... | Required | Yes |
Frequently Asked Questions
What plumbing code does Michigan follow for grease traps?
Michigan 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 Michigan?
Michigan has approximately 19,760 food service establishments according to Census Bureau County Business Patterns data. We currently cover detailed FOG regulations for 6 cities in the state.
Do I need a grease trap permit in Michigan?
Permit requirements vary by city. Of the 6 cities we cover in Michigan, 3 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 Michigan?
Grease trap sizing in Michigan 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.