It's no surprise that washing your car at an automated commercial center saves water. In fact, the Car Wash Association estimates automatic car washes use significantly less water than washing at home: just 45 gallons per car versus 80 to 140 gallons wasted at home. But if you must wash your car at home, do one thing: Park your car on gravel or in a grassy spot instead of on the driveway. The soapy water will then get filtered through the ground and help recharge groundwater sources.
ANDREWS MCMEEL SYNDICATION