Heterocontrole da fluoretação da água de abastecimento público em Uberlândia, Minas Gerais, Brasil

This study aimed to analyze the fluoride levels in the public water supply in Uberlândia, State of Minas Gerais, and, in addition, to compare the values with data from the operational control and from a reference laboratory. A total of 126 samples were collected over 6 months. Samples were analyzed using the electrometric technique, initially at the Federal University of Uberlândia and later at the reference laboratory. With the Generalized Estimating Equations, data were compared to each other and to the operational control data. A statistical difference was detected between the laboratories, between the moments evaluated and in the interaction between the laboratory and the time of sample collection. Even with variability in the results, it can be concluded that fluoride is present in the water supply in the municipality of Uberlândia, at levels within the range recommended by the Collaborating Center of the Ministry of Health in Oral Health Surveillance regarding the concentration of fluorides, and the population has been served with safe water.