In LA, car washes are required to recycle their water. Going to the car wash uses far less water than hand-washing your car at home.
Not washing a car will result in a crustmobile. Six months with no rainfall at all is not uncommon here (that’s the annual “drought” in “drought-tolerant plantings”), and the amount of rain that does fall in the winter rainy season may not be enough to wash away the accumulated crust.
[Don’t ask me how I know this. (-: ]
