Yellow grease is used cooking oil collected separately at the point of use. Grease-trap waste is material captured from wastewater by a grease trap or interceptor. They are different streams and should not be combined unless an authorized receiver expressly accepts the mixture.
Yellow grease
EPA’s food-service FOG fact sheet describes yellow grease as used cooking oil and waste greases separated and collected at the point of use. In a restaurant, that commonly means fryer oil transferred to a designated storage container before it enters wastewater.
EPA and DOE identify waste oils, fats, or recycled cooking grease as possible renewable-fuel feedstocks under specified pathways. That does not mean every load becomes biodiesel, has the same quality, commands a national price, or produces one fixed greenhouse-gas result.
Grease-trap waste
Grease traps and interceptors capture FOG and other material from kitchen wastewater. Their contents can include water and solids as well as grease. The applicable service, transport, record, and receiving-facility rules depend on the local program and the actual waste.
Do not assign a universal composition percentage, zero value, or one disposal destination to all trap waste. NYC, for example, describes yellow and brown grease separately and gives local disposal guidance; another jurisdiction or receiver can use different terms and requirements.
Why separation matters
- Acceptance: a fryer-oil collector may reject water, chemicals, food, packaging, or trap contents.
- Equipment: fryer-oil collection and interceptor pumping can require different containers and service equipment.
- Records: the agreement or local authority may require different documentation for each stream.
- Destination: the authorized receiver decides how each material can be processed or disposed of.
- Commercial terms: a public yellow-grease commodity quote is not the amount a restaurant or collector will receive and says nothing about trap-waste service cost.
Label the streams clearly
Give staff simple instructions: fryer oil goes only into the designated used-cooking-oil container; wastewater goes through the approved plumbing and grease-control system; trap contents are removed only by the appropriate service provider. Follow the accepted container labels and site procedures.
Questions for collectors and pumpers
- What exact material do you accept?
- Which authority, permit, registration, or receiving-facility rule applies here?
- Who owns and maintains each container?
- What contamination or mixed-load conditions cause rejection or added cost?
- What record will we receive after collection or pumping?
- Where is the material taken, and what destination may we accurately describe?
Claims to avoid
Do not call ordinary cooking oil a federal universal waste. Do not apply EPA's petroleum used-oil business rules to vegetable cooking oil. Do not use a fixed national price, composition, pickup schedule, container size, permit threshold, recycling rate, or disposal cost without a dated source that matches the material and location.
Frequently asked questions
Is brown grease the same as used fryer oil?
No. “Brown grease” is commonly used for grease-trap or interceptor material, while yellow grease is separately collected used cooking oil. Follow the governing program's exact definitions.
Can a grease-trap pumper also collect fryer oil?
A company may offer both services, but that does not make the materials one stream. Confirm the equipment, authorization, records, and destinations for each service.
Is yellow grease always valuable?
No value can be guaranteed. Quality, contamination, location, volume, buyer demand, measurement, fees, and contract terms can all affect the arrangement.
Is grease-trap waste never recycled?
Do not make that universal claim. Ask the authorized service provider and receiving facility how the actual material is managed, and describe only the documented destination.
General information only: This page is not legal, tax, environmental, safety, or business advice.
Sources
- U.S. EPA — Controlling FOG Discharges from Food Service Establishments
- NYC Business — Grease Interceptor Information
- U.S. EPA — Approved Pathways for Renewable Fuel
- U.S. DOE — Biodiesel Production and Distribution
- California CDFA — Inedible Kitchen Grease Manifest text
Fact-checked August 15, 2026. Rules and commercial terms can change; recheck the named authority or provider before relying on them.
Author: Grease Trap Locator Editorial Team
The Grease Trap Locator editorial team covers FOG compliance, grease trap maintenance, and commercial kitchen regulations across the US and Canada. Our guides are written for restaurant owners, facility managers, and food service operators who need practical, accurate information without the fluff.
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