Washing a car in the street is illegal, because of residue getting into stormwater drains. Same applies to any facility where water might get directly in.
Most buildings now should have dedicated wash bays, where the water drains into arrestor/settlement pits, and should empty in the sewer. Often they have to be bunded, or suitably sloped to prevent run-off. In heavy-use car washes there might need to a mechanical filtering system as well.
The EPA can fine people for illegal washing, perhaps also the property owner(s) if they don’t have complying installations.