Actually, a sizeable portion of the water used to wash the car in the front yard ends up watering the lawn, while the rest goes down the storm sewer (assuming there are storm sewers in that area) and on to the river, lake, ocean, or whatever.
There's nothing uniquely wrong with this water - it just contains a portion of the airborne and road grime that will get washed down into the earth, streams, and oceans when it rains anyway.
This is probably one of those "property value" issues, like bans on outdoor clothslines and that kind of thing. We can't have the peasants looking like peasants now, can we?
I would say someone on the city council owns interest in a car wash or two also, plus just the sheer stupidity of liberals. Is there no one in FairFax to refute these jerks? I know, it is in CA, but I live in CA and the small area I live in, there is no way they would get away with this except during extreme drought and then only for the duration.