Anduro JJA, Cantú SEU, Campas BON, López CJ, Sánchez MDI, Félix FA

Language: Spanish
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ABSTRACT

Introduction: The most common problem of unhealthy water consumption is gastrointestinal diseases, groundwater is a major source of supply and may have bacterial and chemical contamination. Objective: The aim of the study was to determinate the prevalence and pollution levels caused by mesophilic aerobic bacteria (MAB), total coliform (TC), fecal coliform (FC), Escherichia coli (E. coli) and Salmonella spp., as indicators of sanitary quality in water well used by humans in the south region of Sonora, Mexico. Methods: We analyzed 106 samples from 10 different communities in the Yaqui River source between June 2013 and May 2014. Results: All the samples had microbial contamination and absence of residual chlorine. In 21.7% of sample exhibit more than 200 UFC mL^-1 of MAB, while 50.9% of TC and FC in 39.6%; in 8.5 % of samples E. coli was found, Salmonella spp., was absent in the samples. Conclusions: This study suggest the microbial basis to guide the goverment authorithies to develop in this region some water purification techniques.