 International comparison of tariff level According to a study by NUS consulting, in 2007 the average residential water and sanitation tariff for the five largest cities in France was €2.92 per cubic meter for a consumption of 120 cubic meters per connection and year.This was lower than the average of 11 EU countries in the same year, which was €3.25 per cubic meter.According to the same study tariffs were highest in Denmark (€5.63/m3) and Germany (€5.09/m3).