41. According to unions, water tariffs in Thessaloniki have tripled between 2001 and 2014. 42. The relatively low water tariffs had been made possible by government subsidies for investments. 43. The city administration raised tap water tariffs by an average of 25 percent April 1. 44. Typically water tariffs also vary with consumption, with higher tariffs applied to higher consumption. 45. In 2009 water tariffs were also frozen. 46. A particularity of water tariffs in England and Wales is the low share of metering. 47. Bulk water tariffs differ from one city to the other taking into account production costs. 48. Municipal demand management is complicated by the fact that residential water tariffs are very low. 49. Each state sets its own water tariff . 50. In Chengdu the average water tariff was US $ 0.14 / m3 in 2001.