Grease Trap Regulations by State (2026)

Updated August 24, 2026 · 51 states covered · every claim cited to official sources

Grease trap rules are mostly written city by city, on top of a state framework — which makes "what am I actually required to do?" surprisingly hard to answer. These guides pull the real requirements for each state into one place: who regulates FOG, how often you must clean, whether a licensed hauler and signed manifest are required, how long to keep records, and what violations cost. Every fact links to the state code, agency, or municipal ordinance it comes from.

Not sure what applies to you? Run the state-adaptive compliance checklist — it pulls your state's rules into a checklist you can print.

Northeast & Mid-Atlantic

• Connecticut grease trap regulations — Clean before FOG and solids reach 25% of the unit's depth;
• Delaware grease trap regulations — When the grease trap is ¾ full, the owner must notify their Class F hauler and have it pumped within 2 working days, with complete removal of all cont…
• Maine grease trap regulations — No statewide interval — state rules cover the waste side (transport and disposal), while cities like Portland run their own FOG programs that set clea…
• Maryland grease trap regulations — No single statewide interval — establishments maintain interceptors on a schedule approved by the local authority.
• Massachusetts grease trap regulations — Owner inspects monthly and has a licensed septage hauler clean whenever grease reaches 25% of the trap's effective depth, or at least every 3 months, …
• New Hampshire grease trap regulations — No statewide interval — the state rule governs hauling and disposal, while cities set cleaning schedules through their pretreatment programs.
• New Jersey grease trap regulations — State code (N.J.A.C.
• New York grease trap regulations — Set locally;
• Pennsylvania grease trap regulations — No uniform statewide schedule — Act 537 delegates FOG program design to municipalities, so your city's sewer-use rules control.
• Rhode Island grease trap regulations — In-ground passive grease interceptors must be pumped at least once per year by a licensed hauler, with weekly inspections and immediate emergency pump…
• Vermont grease trap regulations — No fixed statewide interval — Vermont Plumbing Rules require interceptors be pumped/cleaned as needed to stay functional.
• Washington DC grease trap regulations — Gravity grease interceptors: cleaned and inspected every 90 days or less (or sooner if more than 25% full).

Southeast

• Alabama grease trap regulations — No statewide statutory interval — state rules cover installation and access, while municipal utilities set the schedule.
• Arkansas grease trap regulations — No statewide interval — set by municipal pretreatment ordinances.
• Florida grease trap regulations — No specific statewide interval — interceptors must be 'cleaned regularly,' and local governments may set stricter standards.
• Georgia grease trap regulations — Minimum every 90 days (quarterly), or when the combined floating grease layer and settled solids reach 25% of the interceptor's liquid depth — whichev…
• Kentucky grease trap regulations — No statewide interval in the installation rule.
• Louisiana grease trap regulations — No single statewide interval — local pretreatment ordinances govern.
• Mississippi grease trap regulations — Grease interceptors must be fully pumped at least every 90 days (or more often to meet the local FOG program);
• North Carolina grease trap regulations — No statewide numeric interval — local pretreatment programs set schedules around the 25%-of-capacity standard.
• South Carolina grease trap regulations — SCDES R.61-56 requires outside grease interceptors pumped every 30–90 days by a licensed pumper.
• Tennessee grease trap regulations — No single statewide interval.
• Virginia grease trap regulations — No statewide interval — state food rules only require the trap be accessible for cleaning.
• West Virginia grease trap regulations — No statewide cleaning interval could be confirmed — the state grease statute (§16-6-22b) focuses on physically securing outdoor grease trap covers.

Midwest

• Illinois grease trap regulations — No statewide mandatory interval — 415 ILCS 5/22.30 authorizes treatment works (sewer authorities) to set local schedules.
• Indiana grease trap regulations — No statewide mandatory interval — set locally.
• Iowa grease trap regulations — No statewide interval — set by local FOG ordinances.
• Kansas grease trap regulations — No statewide interval.
• Michigan grease trap regulations — State law sets no universal cleaning interval — that's governed by local municipal pretreatment programs.
• Minnesota grease trap regulations — No statewide mandatory interval — set by local municipalities.
• Missouri grease trap regulations — No statewide interval — Missouri adopts federal pretreatment standards and delegates enforcement to local control authorities (sewer districts/POTWs),…
• Nebraska grease trap regulations — No statewide interval — the state pretreatment program (Title 119) targets significant industrial users (≥25,000 gpd), not typical restaurants, so gre…
• North Dakota grease trap regulations — No statewide interval — cleaning schedules are set by local POTW pretreatment programs (Fargo, Bismarck) rather than state rule.
• Ohio grease trap regulations — No single statewide interval.
• South Dakota grease trap regulations — No statewide interval — set by local sewer ordinances.
• Wisconsin grease trap regulations — Wisconsin is one of the few states with a codified statewide cap: grease interceptors must be maintained on a cycle not to exceed 90 days (or per manu…

South Central & Southwest

• Arizona grease trap regulations — No statewide FOG interval — cities set the rules.
• New Mexico grease trap regulations — State rule requires maintenance per manufacturer specs but sets no statewide interval — cities fill it in.
• Oklahoma grease trap regulations — Clean when 25% full of FOG and solids, or at minimum every 90 days, whichever comes first.
• Texas grease trap regulations — No single statewide interval.

West & Mountain

• Alaska grease trap regulations — No statewide interval — set locally.
• California grease trap regulations — No single statewide interval.
• Colorado grease trap regulations — No statewide interval — set by local sewer authorities.
• Hawaii grease trap regulations — No single statewide interval in HAR 11-62 — counties set schedules.
• Idaho grease trap regulations — No statewide mandate — local ordinances typically require cleaning at 20–25% of capacity, which in practice means at least every 90 days for most rest…
• Montana grease trap regulations — No statewide interval — set by municipal programs and trap size/usage.
• Nevada grease trap regulations — No statewide numeric interval — state rule (NAC 446.430) only requires traps be accessible for cleaning.
• Oregon grease trap regulations — No statewide interval — set by local pretreatment programs.
• Utah grease trap regulations — No statewide interval — each utility's FOG Control Plan sets the schedule.
• Washington grease trap regulations — No statewide interval — set by local sewer utilities.
• Wyoming grease trap regulations — No statewide mandate — set by municipal pretreatment programs.

How to Use These Guides

• Find your state above for the agency, cleaning interval, manifest and record rules, and penalty ranges.
• Check your city — each guide lists major-city programs, which often set stricter rules than the state.
• Verify your hauler where a state offers a license lookup (we link it), then keep a signed manifest for every service.
• Keep records with the free maintenance log and cleaning schedule.

These guides summarize official sources for general information and are not legal advice. Rules change — confirm with your state regulator and local FOG program before acting.