Quality of treated water: evaluation of fluoride levels in 10 years of heterocontrol in a city of the State of Santa Catarina
DOI:
https://doi.org/10.22239/2317-269X.00833Keywords:
Fluoridation, Water Treatment, Water Quality Control, Water Analysis, Water Supply, Water Monitoring, Sanitary SurveillanceAbstract
The public water supply fluoridation is the addition of fluorine in the water treatment plants, as a way of preventing tooth decay. This study evaluated the situation of fluoridation of public water supply in the city of Lages, of the State of Santa Catarina, systematizing data from 10 years of external control (2004-2013). Monthly, every other day, 67 water samples from 11 points of supply were collected, totaling 737 samples. To determine the fluoride concentration in the water samples, an electrometric method was used. After analysis, the samples were classified according to the criteria of Ordinance nº 635/Bsd of 26/12/1975 (adequate or inadequate) and the criteria proposed by the Ministry of Health Collaborating Centre for Surveillance of Oral Health (CECOL) of the University of São Paulo (benefits and health risks of the population). Of the samples analyzed, 58.6% had adequate levels of fluoride and 51.1% had maximum benefit and low risk, according to each criterion. Of the inadequate samples of fluoride concentration, 34.7% stood at levels above 1.0 mg L-1 and 6.7% at low levels of fluoride in water (<0.7 mg L-1). For CECOL criteria, 45% of the samples were characterized by moderate to very high risk of developing fluorosis (fluoride content between 0.95 and ≥ 1.45 mg. L-1). It is recommended to adopt effective measures to ensure that the population ingests treated water quality, including appropriate levels of fluoride in the water and the maintenance of health surveillance by the Public Health authorities.Downloads
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