A brewery can have two different wastewater questions: process wastewater from brewing and FOG-bearing wastewater from a taproom or kitchen. Do not assume one grease device or one permit answers both. Map the discharges, then confirm the local pretreatment and plumbing requirements.
Separate the wastewater streams first
Brewing can create wastewater from product loss, vessel and floor cleaning, packaging, and other production work. A taproom kitchen can separately create fats, oils, grease, and food solids. Portland's craft fermented-beverage program is one official example of a local program designed around beverage-production discharge, while Portland's grease-interceptor guidance separately addresses food-service FOG.
Prepare a simple drain map showing where each sink, dishwasher, floor drain, trench drain, mop sink, can washer, and production connection goes. Include planned menu and production changes. Give that information to the sewer and plumbing authorities before relying on a contractor quote or equipment recommendation.
Questions to resolve before design or expansion
- Does the sewer authority classify the operation as a significant or categorical industrial user, or under a local craft-beverage program?
- Which fixtures and production drains must connect to a grease interceptor, solids control, monitoring point, or another approved treatment system?
- Are sampling, flow measurement, pH control, discharge limits, or reporting required for the production stream?
- Which plans, equipment specifications, and calculations must be approved before installation?
- Who may transport each waste stream, and which receiving facilities are approved?
These are investigation questions, not universal brewery requirements. The answers depend on local rules and the facility.
Taproom and kitchen FOG controls
If the brewery serves food, evaluate the connected food-preparation and warewashing fixtures like any other food-service operation. EPA guidance supports source-control practices such as collecting used cooking oil, keeping food solids out of drains, and maintaining the applicable grease-control equipment. The local authority decides the accepted device, routing, capacity, access, and service trigger.
- Keep used fryer oil in the approved collection container rather than any sink, drain, or interceptor.
- Scrape and dry-wipe cookware and dishes before washing.
- Record measurements and service results so the schedule can respond to actual loading and the local maximum interval.
- Recheck approvals before adding a fryer, expanding the menu, increasing seating, or changing production.
Process-wastewater planning
An EPA Oregon brewery case study documents site-specific work on water use and brewery wastewater. It is useful as a process-improvement example, not as a nationwide design standard. A brewery should measure its own operations and use the limits and approval process of its serving authority.
Keep production and kitchen records distinct enough to explain what entered each system. Preserve permits, approved plans, sampling results, service records, disposal receipts, inspection correspondence, and corrective actions for the periods the responsible authorities specify.
Related GTL guides
- FOG planning for catering and shared kitchens
- Grease-trap record keeping
- Commercial-kitchen FOG best practices
Frequently asked questions
Does every brewery need a grease trap?
No universal rule was found. A food-service kitchen may be subject to local grease-control rules, while brewing-process wastewater may be reviewed under a different local program. Ask the sewer and plumbing authorities about the actual fixtures and discharges.
Can brewery process wastewater go through the kitchen grease interceptor?
Do not assume it can. Submit the proposed routing and wastewater information to the responsible authorities. They may require separation, monitoring, pretreatment, or another approved arrangement.
How often should a brewery grease interceptor be serviced?
Follow the local maximum interval or condition trigger and adjust from documented site measurements. A schedule copied from another city or another brewery is not evidence of compliance.
Does a taproom without food avoid all wastewater requirements?
Not necessarily. The absence of a kitchen changes the FOG question, but beverage production, glass washing, floor cleaning, or other discharges can still be regulated by the serving authority.
General information only: This page is not legal, engineering, plumbing, environmental, health, or safety advice.
Official sources
- U.S. EPA — Controlling FOG Discharges from Food Service Establishments
- City of Portland — Craft Fermented Beverage alternative discharge controls
- City of Portland — Grease interceptors
- U.S. EPA archive — Oregon brewery water and wastewater case study
Fact-checked August 14, 2026. Government guidance and local rules can change; recheck the authority serving the facility before relying on any requirement.
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.
Find local contractors who handle cleaning, pumping, and FOG compliance — in your area.