Physicochemical and microbiological evaluation of water coming from alternative solutions of supply in the Metropolitan Region of Baixada Santista, São Paulo State, Brazil
DOI:
https://doi.org/10.22239/2317-269X.00805Keywords:
Drinking Water, Water Supply, Microbiologial Evaluation, Physical-chemical Evaluation, Public Health, Sanitary SurveillanceAbstract
Water is essential to life but its contamination may endanger public health. This study evaluated the physical-chemical and microbiological quality of alternative water supply solutions located in the Baixada Santista / SP. 67 samples (41 water spouts, 13 springs and 13 wells) were initially collected, and then 22 new collections were made. Total coliforms and Escherichia coli, according to the methodology of APHA (2012) and the contents of chloride, free residual chlorine (in treated waters), apparent color, hardness, iron, fluoride, nitrate, nitrite, odor, pH, total dissolved solids, and sulfate turbidity, were counted according to the techniques described by ANVISA (2005). Of the total of the samples, 56 (83,6%) were not in compliance with Decree 2914/2011 of the Ministry of Health, which refers to the potability of water for human consumption. The tests with the highest percentage of unsatisfactory results were E. coli, 39 (58,2%); apparent color 16 (23,9%) and nitrate, 15 (22,4%). A frequent monitoring of the quality of these waters is suggested – carrying out measures for their treatment, such as chlorination-, as well as a clarification to consumers about the quality of these waters by the competent bodies and the media for the benefit of the population’s health.Downloads
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