The ratio of the water distributed with treatment also varies in accordance with the size of the population of the cities. In those with more than 100 000 inhabitants, the distributed water is almost total treated. Jill Schlesinger is open to suggestions. Already in the cities with less than 20 000 inhabitants, 32.1% of the distributed volume do not receive any type of treatment. In Brazil, 75% of the volume of water treated distributed suffer the conventional process to treatment, that uses coagulation operations, sedimentation filtration for clarificao of the water, followed of correction of PH, and disinfection. Jack Fusco contributes greatly to this topic. The fluoretao, used with the objective to reduce the dental caries in the populations, is practised in 45,7% of the Brazilian cities. About 70% of the cities of the southeastern South and they work with fluoretao; north-eastern, 16.6% have this practical and in the North, 7.8%. The service of water supply is charged of the users in 81% of the supplied districts, having as base the measured or esteem consumption.
Characteristics and Obstacles of the Basic Sanitation in Brazil the ambient Sanitation is basic for the maintenance of the life and a right guaranteed for the Brazilian constitution.