Soapy water is not absorbed by paved surfaces. It flows along the curb to the storm drain and into local creeks and the San Francisco Bay. Even soaps labeled nontoxic or biodegradable are harmful to the environment.
Instead: Use a commercial car wash service that recycles water or, if you continue to wash your car at home, direct water onto a lawn or unpaved surface and minimize the amount of soap you use. Find out how to receive a Watershed Watch discount card for car wash discounts.
For information about how to safety conduct an environmentally-friendly car washing event, contact the West Valley Clean Water Program (WVCWP) to receive a free Car Wash Kit and training at email@example.com.