Mobile Car Wash Permit Requirements in Manchester, NH

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. New Hampshire Business Registration

   Mobile car wash and auto detailing businesses operating in New Hampshire must register with the New Hampshire Secretary of State if structured as an LLC, corporation, or partnership (Certificate of Formation filing fee: $100). Sole proprietors using a trade name must file a $50 trade-name registration (RSA 349). An LLC is recommended to protect personal assets given the liability inherent in mobile operations.

   Official government source

   $50 (trade name) to $100 (LLC/corporation filing fee)·1–7 business days

   $50 (trade name) to $100 (LLC/corporation filing fee)

   1–7 business days

2. New Hampshire Stormwater and Wash Water Discharge Compliance

   Mobile car wash operations generate wastewater containing detergents, surfactants, oils and road grime. New Hampshire rules, consistent with the federal Clean Water Act, prohibit discharging this wash water to storm drains, street gutters or waterways. Operators should use a containment mat and recovery system (wet/dry vacuum or pump) or direct wash water to a sanitary sewer inlet. The regulator is the New Hampshire Department of Environmental Services — there is no "Department of Environmental Quality" in New Hampshire. Businesses handling hazardous solvents or degreasers also fall under NHDES hazardous waste rules.

   Official government source

   No permit and no fee for ordinary mobile car washing — this is a discharge prohibition, not a licensed activity·Not applicable; comply before operating

   No permit and no fee for ordinary mobile car washing — this is a discharge prohibition, not a licensed activity

   Not applicable; comply before operating

1. No Manchester General Business License Exists

   Manchester does not require a general business license for mobile car wash or auto detailing businesses. The City Clerk's Business Licensing and Enforcement Division licenses only enumerated activities — food service, high-impact retail selling tobacco, vape or lottery products, peddlers and hawkers, junk and secondhand dealers, pawnbrokers, hotels and B&Bs, tattoo and body-piercing shops, farmers markets, taxicab companies and drivers, non-consensual towing, employment offices, and entertainment venues, fairs and festivals. Mobile car washing is not among them; call (603) 624-6348 to confirm.

   Official government source

   Not applicable — no general business license fee exists·Not applicable

   Not applicable — no general business license fee exists

   Not applicable

2. Manchester Stormwater — Illicit Discharge Compliance

   Manchester prohibits discharging wash water containing detergents, oils and road grime into storm drains, gutters or waterways. The City's stormwater program operates under the EPA NPDES Phase II Small MS4 general permit, which bars non-stormwater discharges to the storm sewer system. Contain wash water and dispose of it properly, for example to a sanitary sewer connection. The City's published stormwater regulations and land disturbance permit apply to land-disturbing projects, not to mobile car washing, and no mobile car wash permit or registration exists.

   Official government source

   No permit or fee applies to mobile car washing; violations of the stormwater ordinance can carry fines·Not applicable — no permit is issued

   No permit or fee applies to mobile car washing; violations of the stormwater ordinance can carry fines

   Not applicable — no permit is issued

3. Hazardous Materials Handling — No Registration Required

   There is no Hillsborough County Environmental Health department and no county chemical-use registration; New Hampshire counties have no environmental-health function. A mobile detailing operation using cleaning agents, engine degreasers or solvents must keep a Safety Data Sheet for each product and follow storage and disposal rules under the federal OSHA Hazard Communication Standard, and must not discharge wash water to storm drains under NHDES and municipal stormwater rules. None of these obligations involve an application or a fee.

   Official government source

   No registration and no fee·Not applicable — there is nothing to apply for

   No registration and no fee

   Not applicable — there is nothing to apply for

4. Manchester Home-Based Business — Zoning Compliance (no separate permit published)

   Manchester publishes no standalone "Home Occupation Permit." A mobile car wash operator storing a vehicle, equipment and supplies at a residence must comply with the home-occupation provisions of the Manchester Zoning Ordinance, which the Board of Mayor and Aldermen ordained on December 16, 2025 and which took effect March 1, 2026. It is administered by the Planning and Community Development Department, not the Finance Department. Typical limits include no customer visits, no exterior signage and no bulk storage of chemicals that would trigger hazardous-materials permitting.

   Official government source

   No home-occupation permit fee is published by the City·Not applicable — no separate application is published

   No home-occupation permit fee is published by the City

   Not applicable — no separate application is published

Official Sources

• Manchester Business Licensing
• New Hampshire Environmental Quality — Water Programs
• EPA NPDES — Stormwater Discharges
• IRS EIN Application

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