Dirty car wash water often contains oil, grease, and toxic metals. Soapy water and the chemicals in many detergents are harmful to fish and other aquatic life. When soapy, dirty water enters the storm drain, the pipes go directly to local streams and rivers. In most areas, stormwater does NOT go to the sewer treatment plant like the water that goes down the drain inside your house.
To prevent stormwater pollution while washing your car: