Análise da presença de fluoreto no sistema de abastecimento coletivo no noroeste do Rio Grande do Sul

Abstract

This study aimed to analyze the occurrence of fluoride in public supply wells installed in municipalities of the 2nd Regional Health Coordination of Rio Grande do Sul – 2nd CRS. Which covers 26 municipalities, which use water from the Serra Geral Aquifer System to meet water demands for human consumption. According to the 2nd CRS, between 2014 and 2022 of the twenty-six municipalities twenty water supply systems with fluoride concentrations higher than the Maximum Permissive Value indicated by Ordinance No. 2,914/2011 (1.5mg/L) for human consumption. In 2022, of 417 wells (Collective Supply Systems - SACs), 21% showed fluoride above the VMP, affecting 6,854 inhabitants (19% of the population supplied by SACs). The municipality of Ametista do Sul has (78.79%) the total population supplied with water that has concentrations higher than permitted, followed by the municipality of Rodeio Bonito and Vicente Dutra. The municipalities with the largest affected population were Novo Tiradentes, Frederico Westphalen and Liberato Salzano. The population living in rural areas, which is supplied by SACs, is at greater risk of suffering diseases related to high concentrations of fluoride in the water supply.