Análise da qualidade da água dos poços artesianos que abastecem o distrito de Capo-Erê, município de Erechim/RS

Abstract

The demand for drinking water accentuates the exploitation of underground water resources, which is the main source of public supply in rural areas. As all water used for collective supply must be subject to quality control and surveillance, this study aimed to assess the water quality of artesian wells that supply Capo-Erê district in Erechim-RS municipality. Parameters of temperature, dissolved oxygen, pH, electrical conductivity, biochemical demand of oxygen, turbidity, total dissolved solids, ammoniacal nitrogen, nitrite, nitrate, total phosphorus and total coliforms were assessed. Therefore, water samples from 2 wells were collected and analyzed in the months of May, June, August, and September 2019. The results made it possible to calculate the Water Quality Index (WQI), as well as to assess the parameters individually and compare them with potability standards required by the Consolidation Regulation N. 5/2017. It was also possible to correlate them with the use and occupation of soil around the wells. As for physical-chemical parameters, the water samples from both artesian wells presented values out of potability standards established by PRC N. 5/2017 of the Ministry of Health, for parameters of pH and Nitrate in the month of August. It is recommended to monitor the Nitrate concentration, which consumption by human population in high concentrations may cause numerous health problems.