I know a car wash guy near me. They have a super duper "behind the scenes" system and they still recycle the water. It's filtered, but not clean as in clean straight from the faucet. Only time I use a car wash is in the winter to get the road salt off and to get the undercarriage sprayed. Then I go home and hand wash it again with a bucket of hot water. Sucks when it's 10 degrees outside, but at least it's clean.