A national water efficiency rating scheme for the vehicle washing industry, it has been developed by the Australian Car Wash Association (ACWA) with assistance from the Victorian Government’s Smart Water Fund. It enables car wash operators to be recognised for their environmentally responsible business practices. The scheme uses a five-star rating system: a five-star car wash uses 100 litres or less of drinking water per wash, while a three-star facility uses 120-140 litres per wash. All five star car washes are approved by Smart WaterMark.