These variations in water usage are function of
wash equipments and schedule (steps). Al-odwani et al. (2006)
have reported a water consumption of 185–370 L per car wash
when utilizing in-bay wash type in Kuwait. According to Boussu
et al. (2007), in Belgium, due to a high capacity of washes, the automatic
car washes are the most widespread, and the average water
consumption is close to 400 L per wash.