New Hampshire Grease Trap Regulations (2026)
Everything a New Hampshire 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.
New Hampshire Requirements at a Glance
| Cleaning frequency | No statewide interval — the state rule governs hauling and disposal, while cities set cleaning schedules through their pretreatment programs. |
| State regulator | New Hampshire Department of Environmental Services (NHDES), Wastewater Engineering Bureau |
| Governing regulation | NH Code of Administrative Rules Env-Wq 1600 (Septage Management); Env-Wq 800 (Sludge Management) |
| Manifest required | Yes — records of each load collected and its final disposal location, submitted to NHDES; haulers are inspected biennially for compliance (Env-Wq 1600) (source) |
| Licensed hauler required | Yes — NHDES Septage Hauler Permit (Env-Wq 1600), biennial, one per tank/vehicle — grease interceptor waste must be removed only by a permitted septage hauling vehicle (source) |
Who Regulates Grease Traps in New Hampshire
At the state level, New Hampshire Department of Environmental Services (NHDES), Wastewater Engineering Bureau (program page) oversees FOG (fats, oils, and grease) discharge; the governing rule is NH Code of Administrative Rules Env-Wq 1600 (Septage Management); Env-Wq 800 (Sludge Management). 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.
Hauler Licensing & Verification
New Hampshire requires grease trap waste to be transported by licensed/registered haulers under NHDES Septage Hauler Permit (Env-Wq 1600), biennial, one per tank/vehicle — grease interceptor waste must be removed only by a permitted septage hauling vehicle. (source) Before signing a contract, verify the hauler's registration on the official lookup — it takes two minutes and it's the single best protection against illegal-dumping liability landing on you.
Manifests & Record Keeping
- Collect a signed manifest (records of each load collected and its final disposal location, submitted to NHDES; haulers are inspected biennially for compliance (Env-Wq 1600)) at every service — date, volume removed, hauler license, disposal facility. (source)
- Track everything in one place: free maintenance log and cleaning schedule template.
City Programs in New Hampshire
Cities run their own FOG programs and often set stricter rules than the state:
Manchester
Nashua
- Program: City of Nashua Wastewater Department — Industrial Pretreatment
- Ordinance: City of Nashua Sewage Disposal Ordinance
- Fines: Operating without an industrial discharge permit is a violation subject to penalties under the Sewage Disposal Ordinance
Worth Knowing in New Hampshire
New Hampshire, like several small New England states, regulates grease at the hauling level: grease trap waste co-mingled with wastewater is treated as septage under Env-Wq 1600, so haulers need a biennial NHDES septage permit per vehicle and NHDES inspects them every two years. NHDES publishes a public list of permitted septage haulers you can check before hiring.
Frequently Asked Questions
How often must grease traps be cleaned in New Hampshire?
No statewide interval — the state rule governs hauling and disposal, while cities set cleaning schedules through their pretreatment programs. 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 manifest for grease trap cleaning in New Hampshire?
Yes. Get a signed manifest (records of each load collected and its final disposal location, submitted to NHDES; haulers are inspected biennially for compliance (Env-Wq 1600)) from the hauler at every service and keep it at least 3 years. It's the document inspectors ask for first.
Can anyone pump my grease trap in New Hampshire?
No — use a licensed/registered hauler (NHDES Septage Hauler Permit (Env-Wq 1600), biennial, one per tank/vehicle — grease interceptor waste must be removed only by a permitted septage hauling vehicle). If your hauler dumps illegally, the paper trail you kept is your protection. Verify registration on the official lookup linked above.
Do I need a permit for a grease trap in New Hampshire?
In most New Hampshire 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
- Find grease trap cleaning companies in New Hampshire
- Run the New Hampshire-adapted compliance checklist
- Put manifests and pricing in writing (free template)
Official Sources
- https://www.des.nh.gov/waste/wastewater/sludge-and-septage
- https://www.des.nh.gov/sites/g/files/ehbemt341/files/documents/env-wq-1600_0.pdf
- https://www.des.nh.gov/sites/g/files/ehbemt341/files/documents/nh-permitted-septage-haulers.pdf
- https://www.manchesternh.gov/Departments/Sewer-and-Stormwater/Industrial-Pretreatment
- https://www.nashuanh.gov/392/Wastewater-Department
This guide summarizes official sources for general information and is not legal advice. Rules change — confirm requirements with New Hampshire Department of Environmental Services (NHDES), Wastewater Engineering Bureau and your local FOG program.
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