 For example, the city of Toluca in Mexico State charges residential users 8.7 pesos (US$0.70)/ m3 for a consumption of 30 m3.This still falls short of the cost of bulk water from the Cutzamala system at nearly 10 pesos (US$0.78)/ m3, without taking into account the cost of distributing water and of sanitation.Furthermore, it is estimated than 1/3 of the water connections in the region are informal and therefore this consumption is not billed.