Análise da concentração de fluoretos e do sistema de vigilância de água de abastecimento público nos 10 municípios mais populosos do estado do Tocantins

Abstract

Fluoridation of public water supply is a very efficient method, but to be effective, it has to happen continuously and uninterrupted, within the norms and standard of potability. The objective of this study was to evaluate if the amount of fluoride used in public water supply in the 10 most populous towns of Tocantins, with more than 20 thousand inhabitants, are within the norms established by ordinances and technical consensus related to the subject. The municipalities of Palmas, Porto Nacional, Paraiso do Tocantins, Tocantinópolis, Gurupi, Guaraí, Dianópolis, Colinas do Tocantins, Araguaína and Araguatins were surveyed for 3 months between May and August 2017. A questionnaire was prepared for to evaluate the process of water those responsible for water control in the state of Tocantins answered fluoridation. In addition, water samples were collected monthly at various points in the cities, containing samples from all municipal water treatment plants. The samples were analyzed by external laboratory and the laboratory analysis of the fluorine ion was performed by the electrometric method. It was observed that 80.2% of the analyzed samples were inadequate, where 8 out of 10 samples were not in the appropriate standard of lower risk of dental fluorosis and greater protection against dental caries. In addition, it was concluded that the state has no specific legislation on the subject, even local temperature oscillating at such peculiar values. These data demonstrate the need to establish a state regulation of fluoridation and a program of heterocontrol in the cities surveyed, in order to guarantee to the population the benefits of fluoride in the control and prevention of dental caries and to avoid diseases such as dental fluorosis.