Grease Trap/Interceptor Permit in Tacoma, Washington (2026)
Without a valid Grease Trap/Interceptor Permit, Tacoma Public Utilities will not connect your new restaurant's sewer line or approve a final inspection, halting your opening completely. This requirement, issued by Tacoma Public Utilities' Environmental Services Division, is also called a Fats, Oils, and Grease (FOG) Control Program permit. Key facts:
- 30 fields — ApronPrep auto-fills 25
- $0–$0 government filing fee
- Varies processing timeline
Analyzed from Grease Trap/Interceptor Permit
83% from one compliance interview
Manual entry or document upload required
Why You Need a Grease Trap/Interceptor Permit
The Grease Trap/Interceptor Permit is mandated by the City of Tacoma's Environmental Services Department under the city's Sewer Use Ordinance (TMC 13.08) and Water System Code (TMC 13.10). These regulations specify discharge limits for fats, oils, and grease (FOG) into the public sewer system, requiring commercial food service establishments to install and maintain approved pretreatment equipment. The permit process, administered by the Environmental Services - Wastewater Operations Division, ensures that your interceptor's design, location, and capacity meet Tacoma's specific technical standards before you connect to the city's sewer line or water main, protecting the infrastructure from blockages and overflows.
Operating a food service business without this permit carries significant and immediate consequences. Non-compliance can trigger enforcement actions that directly threaten your ability to operate, including:
- Service disconnection: The city can physically disconnect your water and sewer services, forcing you to close your restaurant immediately until the permit is secured.
- Administrative fines and penalties: Violations of the Sewer Use Ordinance can result in substantial daily fines. While specific dollar amounts are determined on a case-by-case basis, they are designed to compel compliance and can accumulate rapidly.
- Mandatory remediation costs: You may be held financially responsible for cleaning any sewer line blockages or sanitary sewer overflows caused by unpermitted grease discharge, in addition to paying for the required interceptor installation.
- Insurance and lease complications: Operating without required permits can void your commercial property insurance policy for related damages and put you in breach of your lease agreement, which typically requires compliance with all local codes.
Legal code: Local sewer use regulations, water connection requirements, road/sidewalk ordinances, grease discharge limits
Recent update: As of 2026, the City of Tacoma has enhanced its inspection protocols for new grease interceptor installations, emphasizing verification of proper sizing calculations and accessible sampling ports as part of the permit approval process.
Who Needs a Grease Trap/Interceptor Permit?
| Type | Required | Notes |
|---|---|---|
| Restaurant (Full-Service) | Required | Required for any kitchen preparing meat, seafood, or fried foods that discharge FOG (fats, oils, grease) into the sanitary sewer, per Tacoma Municipal Code (TMC) 12.06.220. |
| Bar / Nightclub | Required | Required if the establishment has a food preparation area, such as a fryer or grill, generating FOG-laden wastewater, as regulated by TMC 12.06.220 and Pierce County food service codes. |
| Food Truck | Required | Required if equipped with a wastewater drain connected to a sanitary sewer system; mobile units must have an approved interceptor unit and are regulated under TMC 12.06.240. |
| Coffee Shop / Café | Required | Required if the business uses dairy steamers, dishwashers, or serves pre-made hot food (e.g., breakfast sandwiches) that generates FOG, per the City of Tacoma's FOG Control Program guidelines. |
See which restaurant types need this requirement — and which don't.
See Full Requirements →Field-by-Field Guide (30 Fields)
25 of 30 auto-filledLegal Business Name
textEnter the exact legal name of your business as it appears on your state business registration (e.g., Articles of Incorporation or Secretary of State filing).
COMMON MISTAKE: Using your DBA, restaurant concept name, or a truncated version, which causes the application to be returned for not matching official records.
Business Address
textEnter the full, official street address of the restaurant facility where the grease trap will be installed, including city (Tacoma), state, and ZIP code.
COMMON MISTAKE: Entering a corporate office, P.O. Box, or manager's address instead of the physical location of the kitchen, which is invalid for a plumbing and site-specific permit.
Facility Type
textDescribe the primary business activity, using terms from the Tacoma Municipal Code (TMC) such as 'Full-Service Restaurant,' 'Fast Food,' 'Commercial Bakery,' 'Catering Kitchen,' or 'Food Truck Commissary.'
COMMON MISTAKE: Using generic terms like 'restaurant' or 'food service' instead of the specific, code-defined classifications required by Tacoma Public Works for calculating grease trap sizing.
Number of Dining Seats
textEnter the total number of permanent, fixed seats in the main dining area (including booths and tables) as shown on your approved floor plan or final building layout.
COMMON MISTAKE: Including bar stools, waiting area seating, or staff seats, which leads to an overestimation of capacity and an incorrectly sized (and more expensive) grease trap requirement.
Has Lounge/Bar Area
checkboxCheck this box only if your facility has a designated, separate area for bar service where alcohol is primarily served and consumed.
COMMON MISTAKE: Checking the box for a small service bar or a pass-through window, which incorrectly triggers a separate seating and fixture calculation for the permit review.
Number of Lounge/Bar Seats
textIf you checked 'Has Lounge/Bar Area,' enter the total number of fixed seats (bar stools, lounge chairs) in that specific area.
COMMON MISTAKE: Leaving this field blank when 'Has Lounge/Bar Area' is checked, or entering '0,' which creates a data conflict and stops review for clarification.
Estimated Meals per Peak Hour
textEnter your projected maximum number of meals served in your single busiest 60-minute period, based on your business plan or a standard industry multiplier for your seat count.
COMMON MISTAKE: Grossly overestimating to show a robust business plan, which directly and significantly increases the required grease interceptor size and cost, often doubling it.
Has Drive-Through Service
checkboxCheck this box only if your facility has a dedicated lane and window for customers to order, pay for, and receive food without leaving their vehicles.
COMMON MISTAKE: Checking the box for a 'pick-up window' used by walk-up or delivery drivers, which incorrectly adds a high-volume service factor to your FOG calculations.
Drive-Through Service Rate (Peak Hour)
textIf you checked 'Has Drive-Through Service,' enter the estimated maximum number of vehicle transactions during your busiest hour (e.g., '45').
COMMON MISTAKE: Entering a daily or weekly total instead of an hourly peak rate, which miscalculates the hydraulic load on the plumbing system and leads to permit rejection.
List of FOG-Producing Fixtures
textList every kitchen fixture that discharges Fats, Oils, and Grease (FOG), including prep sinks, dishwashers (pre-rinse and final), wok stations, floor drains in cooking areas, and automatic grease removal devices.
COMMON MISTAKE: Omitting fixtures like mop sinks, floor drains, or equipment wash-down stations that connect to the sanitary sewer, which is a critical omission that voids the permit.
ApronPrep auto-fills 25 of 30 fields from a single compliance interview — no re-typing, no guessing what the government expects.
Top 5 Grease Trap/Interceptor Permit Mistakes
1. Incorrectly Calculating Grease Trap Capacity (GPD)
Entering the physical tank size (e.g., 1000 gallons) instead of the required design flow rate in Gallons Per Day (GPD) based on fixture counts. This causes immediate rejection because the Tacoma Public Works Department sizes permits based on hydraulic and grease loading, not tank volume. Avoid this by using the department's fixture unit worksheet or a professional engineer's calculation to determine the correct GPD, then enter that number in the capacity field.
2. Submitting Outdated or Non-Compliant Plumbing Plans
Filing generic floor plans or schematic drawings that don't show the grease interceptor's exact location, all connected fixtures (sinks, dishwashers, mop basins), and the full drainage path to the public sewer. Incomplete plans trigger a review correction, adding 2-3 weeks to your timeline. Submit detailed, scaled plumbing plans that comply with the Tacoma Municipal Code, Chapter 13.12, clearly labeling all components and connections.
3. Missing the Waste Hauler Documentation
Failing to include a current, signed agreement with a licensed grease waste hauler or documentation for on-site recycling systems. Tacoma requires proof of a contracted service for pump-out and proper disposal before issuing the operational permit. Not having this ready delays final approval. Secure a service contract from a hauler licensed in Pierce County and attach the executed agreement to your application.
Skip the Paperwork on Your Grease Trap/Interceptor Permit
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Grease Trap/Interceptor Permit by City in Washington
| City | Fee Range | Timeline |
|---|---|---|
| Seattle | ||
| Spokane | ||
| Tacoma |
Timeline: Varies
Determine facility type and seating capacity
Identify your business as a restaurant, hotel, institutional kitchen, etc., and count your maximum legal seating. This classification dictates which sizing method you use and the applicable code sections (Tacoma Municipal Code 2.06). Use the building's certificate of occupancy for the official occupancy load.
Calculate meals per peak hour using seating capacity and average meal duration
Multiply seating capacity by the number of seat turnovers per hour (typically 1-2) based on your average meal service time (e.g., 30-minute fast casual vs. 60-minute full service). This volume-based sizing is required for facilities without specific DFU data per the Tacoma Plumbing Code. Get this number wrong, and your interceptor will be undersized.
Identify all FOG-producing plumbing fixtures and appliances
Create a list of every sink, dishwasher, floor drain, prep sink, wok station, and any equipment that discharges wastewater containing fats, oils, and grease. Reference your equipment list from the kitchen hood permit or plumbing rough-in plans. Missing a three-compartment sink is a common error that leads to re-submission.
Where to Apply
Applications are handled by your local department of public works (dpw) in each city. Select your city below for authority details, fees, and processing timeline.
Other Requirements You'll Need
This is one of 13 requirements for opening a restaurant in Washington.
ADA Compliance Self-Certification
federal
Alarm System Permit/Registration
local
Annual Report Filing
state
Application for Employer Identification Number
federal
See all co-required forms and how they connect to your compliance dossier.
See All RequirementsProcessing timelines for new permits vary significantly, depending on the complexity of your food service operation and the completeness of your initial submission. According to the Tacoma Public Works Department, plan reviews and approvals can take several weeks to schedule. To avoid delays, ensure your application includes all required system specifications and site plans, as a missing Building Permit or site documentation is a common reason for holdups. Contact Public Works for current wait time estimates.
There is no government filing fee for the initial grease trap/interceptor permit application from the City of Tacoma. However, you are responsible for all costs associated with the proper installation, maintenance, and required inspections of the system itself. Costs can arise from contractors, site work, and related permits like a Dumpster/Refuse Enclosure Permit if exterior work is needed. Verify any potential fees directly with Tacoma Public Works, as ordinances can change.
No, grease trap/interceptor permits are site-specific and non-transferable. A permit is issued for a specific plumbing system at a specific address, as stated in Tacoma Municipal Code. If you move your business, you must submit a new application for the new location, which will require new system specifications and inspections. Plan for this as part of your relocation timeline, as the approval process starts from scratch.
The permit itself does not typically have a standard annual renewal; however, you are subject to ongoing compliance. This includes regular maintenance, cleaning (often quarterly for high-volume establishments), and mandatory inspections by the city. Failure to maintain records or pass inspections can result in enforcement actions and fines. Specific inspection schedules are set by Tacoma Public Works based on your establishment's risk category.
A city inspector will verify the grease interceptor is correctly installed per approved plans, is the correct size and type for your facility's flow rate, and is accessible for service. They will check for proper venting, inlet/outlet configuration, and may require documentation of recent cleaning by a licensed waste hauler. Passing this inspection is often a prerequisite for receiving your final Certificate of Occupancy. Not legal advice — confirm inspection details with Tacoma Public Works.
About This Data
This guide is generated from ApronPrep's compliance dossier system, which uses 53 parallel AI authority experts to discover requirements, then downloads actual forms and generates field-level intelligence for each one.
For Washington specifically, we have analyzed compliance dossiers for 3 cities (Seattle, Spokane, Tacoma), generating Rich FILs (Form Intelligence Layers) with 30 form fields analyzed for this requirement. Fee data is sourced from actual county department fee schedules, not estimates.
Our data is verified against official government sources and updated when regulatory changes are detected. If you find an error, please report it — accuracy is our core commitment.
Sources
- Local sewer use regulations, water connection requirements, road/sidewalk ordinances, grease discharge limits
- Seattle — Department of Public Works (DPW)
- Spokane — Department of Public Works (DPW)
- Tacoma — Department of Public Works (DPW)
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