Oregon Grease Trap Regulations (2026)
Everything a Oregon 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.
Oregon Requirements at a Glance
| Cleaning frequency | No statewide interval — set by local pretreatment programs. Portland requires cleaning at 25% of FOG-and-solids capacity (high-efficiency hydromechanical units up to 75%); Eugene guidance is weekly for traps and roughly every 3 months for interceptors. |
| State regulator | Oregon Department of Environmental Quality (DEQ) |
| Governing regulation | Oregon Administrative Rules OAR 340 (DEQ water quality/wastewater); Oregon Plumbing Specialty Code; Portland City Code 17.34 and Administrative Rule ENB-4.26 |
| Manifest required | Yes — post-service pump-out report filed with the local program — Portland BES requires it after each interceptor cleaning (Preferred Pumper registrants may file on your behalf) (source) |
| Licensed hauler required | Yes — Oregon DEQ Sewage Disposal Service business license (Pumper category) — covers transport of grease trap contents (source) |
| Penalties | Oregon DEQ civil penalties range from $100/day (minor) to $12,000/day (major) under OAR 340 Division 12; cities issue their own citations for interceptor deficiencies and sewer obstructions under local code. (source) |
Who Regulates Grease Traps in Oregon
At the state level, Oregon Department of Environmental Quality (DEQ) (program page) oversees FOG (fats, oils, and grease) discharge; the governing rule is Oregon Administrative Rules OAR 340 (DEQ water quality/wastewater); Oregon Plumbing Specialty Code; Portland City Code 17.34 and Administrative Rule ENB-4.26. 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
Oregon requires grease trap waste to be transported by licensed/registered haulers under Oregon DEQ Sewage Disposal Service business license (Pumper category) — covers transport of grease trap contents. (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 (post-service pump-out report filed with the local program — Portland BES requires it after each interceptor cleaning (Preferred Pumper registrants may file on your behalf)) 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 Oregon
Cities run their own FOG programs and often set stricter rules than the state:
Portland
- Program: "Cut Through the FOG" — Bureau of Environmental Services FOG Removal Program
- Ordinance: Portland City Code 17.34; Administrative Rule ENB-4.26
- Cleaning frequency: Clean at 25% of FOG-and-solids capacity (high-efficiency units up to 75%); BES sets frequency by establishment type, size, and flow
- Permit: New construction, redevelopment, tenant improvement, or change of ownership triggers the interceptor requirement; register with the BES FOG program
- Fines: Citations for deficiencies (dollar amounts not published publicly)
Eugene
- Program: City of Eugene Industrial Pretreatment Program — FOG requirements
- Ordinance: Eugene City Code; NPDES pretreatment standards
- Cleaning frequency: Traps may need weekly cleaning; interceptors about every 3 months — full removal of all contents (floating grease, wastewater, and bottom sludge)
- Permit: Plumbing permit required to install any grease removal device
Worth Knowing in Oregon
Oregon delegates cleaning frequency to local pretreatment programs; Portland's "Cut Through the FOG" is among the most structured, requiring post-pump reports (within 14 days) and running a Preferred Pumper registration for haulers. Eugene explicitly prohibits enzymes or bacterial additives as a substitute for actually cleaning the trap.
Frequently Asked Questions
How often must grease traps be cleaned in Oregon?
No statewide interval — set by local pretreatment programs. Portland requires cleaning at 25% of FOG-and-solids capacity (high-efficiency hydromechanical units up to 75%); Eugene guidance is weekly for traps and roughly every 3 months for interceptors. 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 Oregon?
Yes. Get a signed manifest (post-service pump-out report filed with the local program — Portland BES requires it after each interceptor cleaning (Preferred Pumper registrants may file on your behalf)) from the hauler at every service and keep it at least 3 years. It's the document inspectors ask for first.
What are the penalties for grease trap violations in Oregon?
Oregon DEQ civil penalties range from $100/day (minor) to $12,000/day (major) under OAR 340 Division 12; cities issue their own citations for interceptor deficiencies and sewer obstructions under local code. Enforcement is usually municipal, so your city's fine schedule controls — the fastest way to stay off it is a maintained cleaning schedule and complete records.
Can anyone pump my grease trap in Oregon?
No — use a licensed/registered hauler (Oregon DEQ Sewage Disposal Service business license (Pumper category) — covers transport of grease trap contents). 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 Oregon?
In most Oregon 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 Oregon
- Run the Oregon-adapted compliance checklist
- Put manifests and pricing in writing (free template)
Official Sources
- https://www.portland.gov/bes/preventing-pollution/fats-oil-and-grease/grease-interceptors
- https://www.portland.gov/policies/environment-built/sewer-stormwater-erosion-control/enb-426-fats-oils-and-grease-removal
- https://www.eugene-or.gov/DocumentCenter/View/5213/Food-Service-General-Requirements
- https://www.oregon.gov/deq/residential/pages/onsite-licensing.aspx
- https://www.oregon.gov/deq/regulations/pages/calculation.aspx
This guide summarizes official sources for general information and is not legal advice. Rules change — confirm requirements with Oregon Department of Environmental Quality (DEQ) and your local FOG program.
Oregon Grease Trap Costs & Rules by City
City-level pricing, cleaning frequency and permit requirements:
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