Aspectos sanitários de corpos lênticos temporários utilizados para consumo humano.

Abstract

This work analysed the sanitary aspects of 21 water bodies used for human consumption. They were located in rural áreas of several municipalites and districts near the city of Campina Grande, ParaibA State, Northeast Brazil. From November 1989 to July 1990, water samples were analysed for temperature, pH, transparency, turbidity, dissolved oxygen, BQD5, soluble orthophosphate, alkalinity, chloride, hardness, faecal coliforms and faecal streptococci, Pseudomonas aeruginosa, chlorophylla, identification of algae and fungus genera. Cluster analysis was carried out to gather water bodies with similar features. Pearson correlation test was performed to examine significant statistical correlation among the parameters. All reservoirs presented poor sanitary conditions shown through high values of faecal indicator bactéria specially faecal coliforms and streptococci. Probably all these water could spread pathogens damaging the water user health. Values. for physico-chemical parameters reached compatible levels to those considered standard for human consumption. Nutrient levels were favorable for phytoplankton growth although not enough to cause an algal bloom. Several algas genera were identified but only the green algae ( Chlorophyta ) showed an association with 80D5. Non sporulated fungus, PeniciJJium, Rhodotorula and Cândida were frequent. The last one is an opportunistic fungus causing skin infections. Therefore these water represented a potential risk for the transmition of diseases caused by fungus. Cluster analyses showed that sanitary water quality was independent from the water bady physical features and localization. The inappropriate use of the reservoir was responsable to deteriorate water quality.