Massachusetts Grease Trap Regulations
FOG Compliance Overview
Massachusetts 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 Massachusetts Department of Environmental Protection (MassDEP).
With approximately 17,049 food service establishments statewide, Massachusetts 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 7 cities we cover, 6 require a dedicated FOG permit. 6 cities enforce the 25% rule for grease trap pumping.
Need a grease trap in Massachusetts?
Our free calculator uses IPC code requirements to recommend the right size for your establishment.
Size My Grease TrapCity Regulations in Massachusetts
| City | Pumping Frequency | Permit | 25% Rule |
|---|---|---|---|
| Billerica | Monthly (internal grease traps); Every 90 days (externa... | Required | Yes |
| Boston | Quarterly minimum (every 90 days); must be pumped befor... | Required | Yes |
| Lowell | As determined by Executive Director; must not allow FOG... | Required | Yes |
| New Bedford | Monthly or when FOG/sludge reaches 25% of effective dep... | Required | Yes |
| Springfield | Internal traps: monthly; External traps: every 90 days ... | Required | Yes |
| Tewksbury | At least every 3 months or when 25% rule is triggered, ... | Required | Yes |
| Worcester | See details | — | — |
Frequently Asked Questions
What plumbing code does Massachusetts follow for grease traps?
Massachusetts 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 Massachusetts?
Massachusetts has approximately 17,049 food service establishments according to Census Bureau County Business Patterns data. We currently cover detailed FOG regulations for 7 cities in the state.
Do I need a grease trap permit in Massachusetts?
Permit requirements vary by city. Of the 7 cities we cover in Massachusetts, 6 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 Massachusetts?
Grease trap sizing in Massachusetts 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.