Mobile Car Wash Permit Requirements in Salt Lake City, UT

1. EIN (Employer Identification Number)

   Required if you have employees or operate as an LLC or corporation. Free from the IRS, obtained instantly online.

   Official government source

   Free·Immediate (online application)

   Free

   Immediate (online application)

2. EPA Stormwater Compliance — Clean Water Act Section 402

   Mobile car wash operations that discharge wash water are subject to the federal Clean Water Act. The EPA's National Pollutant Discharge Elimination System (NPDES) prohibits discharge of polluted wash water to storm drains or waterways without a permit. Most mobile operators achieve compliance by using containment systems and disposing of water via sanitary sewer. Larger operations (e.g., fleet washing facilities) may require an NPDES permit.

   Official government source

   Free (containment equipment: $200–$1,500)·Before first wash

   Free (containment equipment: $200–$1,500)

   Before first wash

1. Utah Business Registration

   Mobile car wash and auto detailing businesses structured as an LLC, corporation, or partnership must register with the Utah Division of Corporations and Commercial Code (file online at businessregistration.utah.gov). Sole proprietors using a trade name must register the DBA with the same state division. An LLC is recommended to protect personal assets, as mobile operations working at customers' properties carry inherent liability. Registrations renew annually.

   Official government source

   $59 LLC/corporation filing; $22 DBA registration; $18/year annual renewal (FY2026 fee schedule)·1–7 business days

   $59 LLC/corporation filing; $22 DBA registration; $18/year annual renewal (FY2026 fee schedule)

   1–7 business days

2. Utah Environmental / Stormwater Compliance

   Mobile car wash operations generate wastewater containing detergents, surfactants, oils, and road grime. Utah environmental regulations — consistent with federal Clean Water Act requirements — prohibit discharge of this wash water to storm drains, street gutters, or waterways. Operators must use a wastewater containment mat and recovery system (wet/dry vacuum or pump), or must ensure wash water flows to a sanitary sewer inlet. Operators using hazardous cleaning solvents or degreasers may require a state permit. Contact the Utah Department of Environmental Quality for compliance guidance.

   Official government source

   Free–$200 (registration or permit fee, if required)·1–4 weeks (if permit required; otherwise immediate with self-compliance)

   Free–$200 (registration or permit fee, if required)

   1–4 weeks (if permit required; otherwise immediate with self-compliance)

3. Utah Sales Tax Registration

   Hand car washing and auto detailing are taxable in Utah: under Utah State Tax Commission Publication 25, assisted car washes — where cleaning labor is primarily performed by a person — are subject to sales tax (only unassisted, machine-only washes are exempt). Register for a free Utah sales tax license through Taxpayer Access Point (tap.utah.gov), collect the applicable state and local sales tax from customers, and remit on the required schedule.

   Official government source

   Free·Immediate–1 week (online)

   Free

   Immediate–1 week (online)

1. Salt Lake City General Business License

   Mobile car wash and detailing businesses based in Salt Lake City need a city business license from the Business Licensing Division, renewed annually. Confirm with Business Licensing whether your vehicle count affects fees.

   Official government source

   Base license fee plus per-employee/regulatory fees per the Salt Lake City Consolidated Fee Schedule (fees are not published as a flat range; confirm current amounts at slc.gov or 801-535-6644)·1–2 weeks

   Base license fee plus per-employee/regulatory fees per the Salt Lake City Consolidated Fee Schedule (fees are not published as a flat range; confirm current amounts at slc.gov or 801-535-6644)

   1–2 weeks

2. Salt Lake City Stormwater / Wastewater Discharge Compliance

   Salt Lake City prohibits the discharge of mobile car wash wastewater into storm drains, gutters, or waterways. Wash water contains detergents, oils, and road grime that are harmful to local waterways. Operators must: (1) use a portable containment berm or mat to capture runoff, (2) vacuum up wash water with a wet/dry vac or pump, and (3) dispose of collected water at an approved sanitary sewer access point or licensed disposal facility. The city's Public Works or Stormwater division may conduct inspections. Violations may result in fines.

   Official government source

   $0 - no registration or permit fee; compliance costs are your containment/recovery equipment and proper disposal·1–3 weeks (self-certify compliance before operating)

   $0 - no registration or permit fee; compliance costs are your containment/recovery equipment and proper disposal

   1–3 weeks (self-certify compliance before operating)

3. Hazardous-Material Handling Practices (no county registration exists)

   Salt Lake County has no chemical-use registration for mobile detailing businesses. You must still handle degreasers and solvents responsibly: keep Safety Data Sheets, store chemicals securely, and never discharge them to storm drains - illicit-discharge rules and state/federal waste rules apply. No county registration or fee is involved.

   $0 - no registration program or fee exists·1–2 weeks

   $0 - no registration program or fee exists

   1–2 weeks

4. Salt Lake City Home-Based Business License (only if the operation has off-site impact)

   If you store your mobile car wash vehicle and supplies at a Salt Lake City residence, city licensing applies only when the business creates material off-site impact beyond normal residential use (e.g., employees convening, commercial-scale chemical storage, customer traffic). No-impact home-based businesses are exempt from licensing and fees under Utah Code 10-1-203.5. Large-scale chemical storage at a residence is restricted regardless.

   Official government source

   $0 for a no-impact home-based business; otherwise per the SLC Consolidated Fee Schedule·1–3 weeks

   $0 for a no-impact home-based business; otherwise per the SLC Consolidated Fee Schedule

   1–3 weeks

Official Sources

• Salt Lake City Business Licensing
• Utah Environmental Quality — Water Programs
• EPA NPDES — Stormwater Discharges
• IRS EIN Application

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