I do not disagree with water shed run off or the pollutants that are getting into the lakes. I'm not going to go hug a tree now. Get to the major sources of run off. The average joe detailing is not causing 90% or even 10% of the pollutants going into are lakes and streams. Yes phosphorus is extemely damaging to lakes and other water sources. Who is putting more pollutants into our water sources the guy detailing or say a farmer spreading NPK (nitrogen, phosphorus, pottasium) on his field. What about the average home owner putting fertilizer on his lawn. Most areas around the country still allow "P" in the fertilizer. Bans are now coming out against "P" in fertilizer along with laundry detergent. We do need to protect our water sources. Go after the major sources of pollutants, such as oil off of asphalt, concrete curing agents, used oil from cars, antifreeze from motor vehicles, etc. , etc. etc. These are far more harmful then some soap from car washing in my drive way. Remember the big oil spill in Alaska? Granted that is an extreme example. The next time you have your boat on the water look behind the engine--notice the nice colors forming on the water. Do we think that is less damaging then washing your car? Sure wouldn't want to stop that pollutant. Water shed is important, and we do need to protect our waters. If you ban washing vehicles now what is next?