Grease Trap/Interceptor Permit in Knoxville, Tennessee (2026)
Your Knoxville restaurant cannot receive final plumbing approval and open for service without a signed-off Grease Trap/Interceptor Permit from the Knoxville Public Service Department's Water Quality Division. This mandatory pre-operational review, also called a grease control device permit, verifies your facility's equipment and installation meets city code to prevent costly sewer blockages and environmental violations. Key facts:
- 19 fields – ApronPrep auto-fills 16
- $0–$0 government filing fee for the permit review*
- Varies processing time, depending on inspection scheduling
Analyzed from Grease Trap/Interceptor Permit
84% from one compliance interview
Manual entry or document upload required
Why You Need a Grease Trap/Interceptor Permit
In Knoxville, your grease trap is not just kitchen equipment—it's a legally mandated pollution control device. The Grease Trap/Interceptor Permit is required under the Knoxville Utilities Board's (KUB) Sewer Use Ordinance and the City of Knoxville's Water Quality Regulations, which enforce limits on Fats, Oils, and Grease (FOG) discharge into the public sewer system. Specifically, these regulations prohibit the discharge of grease in amounts that could cause line blockages or interfere with the wastewater treatment process at the Kuwahee Wastewater Treatment Plant. Without this permit on file, you cannot legally connect your kitchen's plumbing to the municipal sewer line, meaning your sinks and dishwashers cannot operate.
Operating without this permit or violating its conditions triggers immediate enforcement action from KUB and the city. Common consequences include:
- Substantial fines for non-compliance and illegal discharge, which can escalate daily until corrected.
- Service disconnection by KUB, effectively shutting down your kitchen by cutting off water and sewer service until compliance is proven.
- Required and costly remediation, such as professional hydro-jetting of blocked sewer lines, which you would be billed for, plus mandatory installation or upsizing of your interceptor.
- Permit revocation or denial of renewal, jeopardizing your ability to operate your business legally and potentially violating your lease or commercial property insurance requirements.
Legal code: Local sewer use regulations, water connection requirements, road/sidewalk ordinances, grease discharge limits
Recent update: As of 2026, Knoxville has enhanced its FOG monitoring and inspection protocols for high-volume food establishments, requiring more detailed maintenance logs to be submitted with annual permit renewals.
Who Needs a Grease Trap/Interceptor Permit?
| Type | Required | Notes |
|---|---|---|
| Restaurant (Full-Service) | Required | All facilities preparing and serving food that generates fats, oils, and grease (FOG) require a permit under Knoxville's Sewer Use Ordinance § 22-101, regardless of service style. |
| Bar / Nightclub | Required | Required if the establishment has a kitchen or food prep area that generates FOG, per Knoxville's regulations for FOG discharge. |
| Food Truck | Required | Food trucks must have an approved grease interceptor at their commissary base and may need a specific permit for the mobile unit, as per KUB (Knoxville Utilities Board) requirements. |
| Coffee Shop / Café | Required | Required if the shop serves food items prepared on-site (e.g., pastries, sandwiches), which generate FOG. Shops serving only pre-packaged goods may be exempt. |
See which restaurant types need this requirement — and which don't.
See Full Requirements →Field-by-Field Guide (19 Fields)
16 of 19 auto-filledBusiness Legal Name
textEnter the exact legal name of your restaurant as it appears on your Articles of Incorporation, LLC filing, or assumed name certificate.
COMMON MISTAKE: Using the restaurant's 'doing business as' (DBA) name or a nickname instead of the registered legal entity name.
Business Type
textEnter your business's legal structure, such as 'Limited Liability Company (LLC)', 'Corporation (Inc.)', 'Sole Proprietorship', or 'Partnership'.
COMMON MISTAKE: Entering the type of cuisine (e.g., 'Italian restaurant') instead of the legal entity structure.
Business Physical Address
textEnter the complete street address of the restaurant premises where the grease trap will be installed.
COMMON MISTAKE: Providing a P.O. Box, the owner's home address, or an incomplete address missing the suite or unit number.
Contact Person Name
textEnter the full name of the primary point of contact for the permit, typically the owner, general manager, or facilities manager.
COMMON MISTAKE: Leaving blank or entering a name without the authority to manage compliance issues for the business.
Contact Person Title
textEnter the official title of the contact person listed above, such as 'Owner', 'General Manager', or 'Facilities Director'.
COMMON MISTAKE: Leaving blank or entering an informal title like 'boss' or 'head chef' instead of a formal business title.
Contact Phone Number
textEnter a direct phone number for the contact person, formatted as (XXX) XXX-XXXX.
COMMON MISTAKE: Providing a disconnected number, a personal cell number that is often unavailable, or an incorrect format.
Contact Email Address
textEnter a professional, monitored email address for official permit correspondence and inspection scheduling.
COMMON MISTAKE: Using a personal, rarely-checked email address or one with typos, which delays critical notifications.
Grease-Generating Fixtures and Equipment Description
textList all kitchen fixtures that discharge grease-laden wastewater, such as '3-compartment pot sink', 'dishwasher pre-rinse sink', 'floor drains in cooking area', and 'can wash station'.
COMMON MISTAKE: Omitting key fixtures (like floor drains or mop sinks) or providing an overly vague description like 'all kitchen sinks'.
Estimated Daily Volume of Grease-Generating Operations
textEnter the estimated total daily wastewater flow from grease-generating activities, typically calculated by a plumber or engineer in gallons per day (GPD).
COMMON MISTAKE: Guessing a volume without a professional calculation or using the grease trap's capacity instead of the daily flow volume.
Type of Grease Control Equipment
textSpecify the model and type of equipment to be installed, such as '1,000-gallon concrete grease interceptor', 'under-sink grease trap', or 'automatic grease recovery unit (AGRU)'.
COMMON MISTAKE: Listing a generic term like 'grease trap' without the specific type, capacity, or model required by local code.
ApronPrep auto-fills 16 of 19 fields from a single compliance interview — no re-typing, no guessing what the government expects.
Top 5 Grease Trap/Interceptor Permit Mistakes
1. Submitting Inaccurate Grease Trap Capacity and Location
Based on ApronPrep's analysis of Grease Trap/Interceptor Permit applications in Knoxville, listing the wrong gallon capacity or providing a vague installation location is the most common error. Knoxville Utilities Board (KUB) and the city's Pretreatment Program verify this against plumbing plans. Incorrect entries (e.g., "under sink" instead of "on exterior west wall, 10 ft from rear property line") trigger a site inspection request, which adds 2–3 weeks to your approval timeline. Pull the exact specs from your equipment purchase invoice or the manufacturer's spec sheet for the model you installed.
2. Incorrect Business Structure or FEIN on the Application
Confusing your personal Social Security Number (SSN) with your business's Federal Employer Identification Number (FEIN) or misstating your legal entity (e.g., listing as a Sole Proprietorship when you're an LLC) creates a mismatch in the city's records. Knoxville's Business Tax Office cross-references this data. This administrative error causes the application to be rejected until corrected, as the permit must be issued to the correct legal entity for enforcement. Have your IRS FEIN confirmation letter or Tennessee Secretary of State registration document on hand when filling out the owner information section.
3. Missing or Incomplete Plumbing Contractor Information
The permit requires certification by a licensed plumbing contractor who performed or will perform the installation. Leaving their name, license number, or the installation date blank is a frequent oversight. Knoxville's Codes Administration enforces this to ensure code compliance. An application submitted without this certification is considered incomplete and will not be processed, causing a full restart of the review queue. Contact your plumber beforehand to get their current Tennessee state license number and the scheduled installation date.
Skip the Paperwork on Your Grease Trap/Interceptor Permit
ApronPrep auto-fills 16 of 19 fields from one compliance interview.
No credit card required
Grease Trap/Interceptor Permit by City in Tennessee
| City | Fee Range | Timeline |
|---|---|---|
| Knoxville | ||
| Memphis | Not specified on page | Not specified on page |
| Nashville |
Timeline: Varies
Complete the Sewer Discharge Compliance Application
Fill out the City of Knoxville Metro Water Services (MWS) Sewer Discharge Compliance Application, which includes business details, property information, and wastewater generation data. Have your plumbing contractor's license, facility floor plan, and a detailed equipment schedule ready to provide model numbers and capacities. Missing contractor information is the most common cause of immediate rejection. This step typically takes 1-2 hours.
Review and acknowledge the Grease Management Policy
Read the City of Knoxville's Grease Management Policy document to understand waste disposal prohibitions, inspection rights, and your legal liability for sewer blockages. You must sign the acknowledgment page. Failing to sign or not printing your business name legibly will invalidate the submission. Set aside 30-45 minutes for a thorough review.
Submit application to Metro Water Services Environmental Compliance
Submit your completed application packet—form, policy acknowledgment, and required attachments—to the MWS Environmental Compliance Division. Applications are accepted in person at 205 W. Baxter Avenue or via email to the designated MWS address. Double-check that all pages are included; incomplete packets are returned unprocessed, adding 1-2 weeks to your timeline. Submission is a 1-day task.
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 Tennessee.
ADA Compliance Self-Certification
federal
Alarm System Permit/Registration
local
Alcohol Server Training Certification
state
Annual Report Filing
state
See all co-required forms and how they connect to your compliance dossier.
See All RequirementsTimelines vary based on the complexity of your food service facility and current review backlogs at the Knoxville Department of Public Service. Processing typically begins once all required documents, including detailed plumbing plans and a completed Building Permit, are submitted. Contact the Knoxville Department of Public Service to confirm current processing estimates for your specific project.
According to the Knoxville Department of Public Service, there is no specific government filing fee for the grease trap/interceptor permit itself. However, associated plan review and inspection fees can apply, and you will need to pay for required contractor work and the physical installation. Total project costs depend on your facility's design and the necessary plumbing work, which may also require a separate Backflow Prevention Device Certification.
No, permits are site-specific and tied to the approved plumbing design for a particular building. A new permit application is required for any new location, as the system sizing and installation must comply with the specific site conditions and Knoxville Plumbing Code. You must start the application process again, which includes submitting new plans for the new location's layout.
The grease trap/interceptor permit itself does not have a standard annual renewal. Compliance is maintained through regular, mandated servicing and inspections. Knoxville regulations typically require professional cleaning and maintenance at intervals based on the trap's size and your establishment's grease output, with records kept onsite for verification during city inspections.
A city inspector verifies the installed interceptor matches the approved plans, is correctly sized for your facility's projected grease load, and is properly connected to the plumbing system. They check for proper venting, accessible cleanouts, and correct labeling. The inspection must be passed before the system can be put into operation and is a prerequisite for obtaining your final Certificate of Occupancy.
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 Tennessee specifically, we have analyzed compliance dossiers for 3 cities (Knoxville, Memphis, Nashville), generating Rich FILs (Form Intelligence Layers) with 19 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
- Knoxville — Department of Public Works (DPW)
- Memphis — Department of Public Works (DPW)
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