Car washing at home causes soap and other pollutants to end up in the storm drains that lead to the Bay or the ocean. Commercial car washes use less water and any discharge goesinto the sanitary sewer system. The San Mateo Countywide Water Pollution Prevention Program is partnering with 11 commercial car washes located throughout San Mateo County to offer a discount coupon for a car wash, with the closest location to Brisbane being Millbrae Express Car Wash. If you're looking to get your car squeaky clean, while keeping pollutants out of the storm drains, then stop by City Hall and pick up your one-time use discount card! Offers good through 12/31/2011.