Análise microbiológica da água subterrânea da cidade de Dourados - MS

Abstract

With the increasing demand of water resources, the increased consumption of groundwater has become a viable alternative to the population because of its abundance and relative low cost of funding. However, there is concern regarding their microbiological quality, since water can present pathogens affecting the health of the population. Thus the aim of this study was to evaluate the microbiological quality of groundwater in Dourados City (MS). 24 samples from semi-artesian in Dourados City (MS) wells were analyzed in the period from June to September 2013. Bacteriological testing for total and fecal coliforms were performed according to the protocol of the American Public Health Association (2005). The results revealed that 54.1% of the samples presented total coliforms and 20.8% presented Escherichia coli contamination. The number of heterotrophic bacteria present in the samples was determined by the Spread Plate Technique, quadrants 1 and 4 showed that the rates were above the limit allowed by Ordinance no 2.914, 2011, Ministry of Health. From the results it is concluded that 54.1% of the samples did not meet the standards set by law and is unfit for consumption, and such contamination can be directly related to the depth of the wells analyzed.