Abstract

ALMAZAN-JUAREZ, María Teresa et al. Water quality and classification of uses in the lower Papagayo river basin, Guerrero, Mexico. Ecosistemas y recur. agropecuarios [online]. 2016, vol.3, n.9, pp.293-305. ISSN 2007-901X.

Physico-chemical and microbiological parameters were analyzed during dry and rainy season to verify the water quality of the lower Papagayo river basin and its tributaries. The analyzed parameters were compared with the Ecological Water Quality Criteria and Mexican Official Standards. Some values of the physico-chemical and microbiological analyses were outside of the maximum permissible levels in the rainy season (fecal coliforms, sedimentary solids, total suspended solids and turbidity), and which were significantly different with respect to dry season, whose values of the total hardness and dissolved oxygen increased in some sampling sites during this season. Metal concentrations showed values according to the official regulations, as well as the fats and oils. Physico-chemical and water quality of the Papagayo river basin show that Omitlán river was the station with the highest contamination level. Despite the considerable contributions of pollutants into the principal stream of the Papagayo river, in the two sampling stations located in the lower portion of the basin, termed Bellavista Papagayo and Lomas de Chapultepec, it is appreciated that the river has a good capacity of autopurification, even when in these localities there is an important contribution of pollutants. Based on the results obtained and the application of those rules, it was determined that the water in the downstream basin of the Papagayo river should not be used directly as a source of drinking water for the population centers. This is because they contain dangerous pollutants that cause adverse effects to humans.

Keywords : Human health; microbiology; monitoring; Papagayo river; water quality.

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