Permit Watch #5: Charlotte, NC — Your Driveway Wash Is Legal, a Paid Wash's Water Is Not

Permit Watch #5: Charlotte, NC — Your Driveway Wash Is Legal, a Paid Wash's Water Is Not

PERMIT WATCH #5: Charlotte, NC — washing your own car in the driveway is legal. Getting paid to wash someone else's car in the same driveway is a different story — and the city's rule draws the line in so many words.

Charlotte has no permit cap and no mobile-wash permit. The ceiling is a discharge rule. Under Charlotte City Code Chapter 18, Article III (Stormwater Pollution), Ordinance No. 9802, adopted May 26, 2020, no one may discharge non-stormwater or any pollutant to the stormwater system or the Waters of the State (Section 18-80). The definition of "Illicit Discharge" expressly names "commercial vehicle Washwater" and "soaps/detergents" (Section 18-77). The only washing the ordinance lets through is item 17 of the allowable incidental discharges in Section 18-81: "Single-family residential and Charity Vehicle Washing." Your own car, your own driveway. A paid mobile wash is not on that list.

The city's own discharge guidance spells out what a mobile washer must do instead. For "Temporary Car Wash, Mobile Fleet/Truck Washing and Detailing (more than 1 vehicle per location)," wash water may go to exactly three places: the sanitary sewer, a landscaped area, or an environmental waste company. The storm drain is not an option. To the sanitary sewer, up to 100 gallons a day needs no prior approval; 100 to 1,000 gallons needs pre-treatment to remove oil, grease, and solids; anything more needs Charlotte Water's approval at (704) 525-6435. Discharges must run pH 6–9, with biodegradable products. And engine or undercarriage degreasing goes through an environmental waste company only — no exceptions.

The penalty is civil, not criminal: up to $10,000 per day per violation under Section 18-83(c)(2), each day a separate violation.

One thing that changed this month: Charlotte's mandatory Stage 2 drought restrictions — the ones that banned washing vehicles at home — ended November 2, 2026. Charlotte Water is now at Low Inflow Protocol Stage 1, where conservation is voluntary. The home-washing ban is lifted; the discharge rule above did not change and is still the law.

What it means in practice: a mobile washer working in Charlotte needs a capture-and-dispose setup — containment and recovery, then the sanitary sewer (within the volume limits), a landscaped area, or a waste hauler — never the storm drain. The homeowner's exemption does not travel with the washer. For the basics of where wash water is allowed to go, see Compliance Week Day 1: Where Your Wash Water Is Allowed to Go, and for the containment gear that keeps it out of the drain, see Compliance Week Day 2: The Simple Containment Setup.

What to check before operating there: confirm your disposal route and volumes with Charlotte Water before taking jobs, and keep wash water out of the gutter even on a single-vehicle stop.

Source: Charlotte City Code Ch. 18, Art. III — https://regionalstormwater.org/wp-content/uploads/2025/06/Charlotte-Stormwater-Pollution-Control-Ordinance-adopted-05-26-2020.pdf

Informational only, not legal advice — verify with the city's permit office.