If you use a pressure washer during your fundraiser you can wash twenty cars with one capful of soap in a two-thirds filled five-gallon water bucket. Of course your soap will be biodegradable. At least twenty-five percent of the cars you wash will not require the use of soap due to previous wax coats that have been applied. These cars combine to lower your wet/rinse cycle to about thirty seconds of spray time or 1.2 gallons of water per car. This is fifty times more efficient. You can wash fifty cars with a pressure washer to the one car washed with a garden hose in the driveway. This constitutes a significant savings in water.

If you spray a car with special equipment (pressure washer) you will get a fine mist spray. The water can be applied evenly and gives the run off a spread effect. Thus the water that reaches the ground evaporates quickly. A car that needs to be soaped will have a wet/rinse cycle of about one minute and will use about two gallons of water. This water never reaches the storm drains.

You can also contract with a local professional mobile car washer or car detailer to help your group. They only use 2.4 gallons of water per car and their pressure washers only put out 2.4 GPM. If they spray a car for twenty seconds to get it wet, then soap off the dirt and then rinse the car for approximately forty seconds this equals sixty seconds or one minute of sprayed water at 2.4 gallons per minute.

Working with a local professional can be very efficient. You can also purchase a pressure washer from a large department store and do it yourself. By the time you