Water quality analysis of monitoring wells in an area for disposal of solid urban waste

Abstract

Monitoring groundwater quality in areas with potential contamination plays an important management tool. This research aimed to analyze a historical series of groundwater quality monitoring through a well network in a landfill area from 2007 to 2018. The results indicated changes in microbiological parameters (total and thermotolerant coliforms) which presented the largest relative contribution of the analyzed parameters. The variables chloride, nitrate and sulfate also showed changes in the analyzed period. Being these, with values in disagreement with the current legislation for the use of human supply. Among the analyzed parameters, only the pH was related to the precipitation. The grouping allowed the formation of specific groups, especially PM03, with individual characteristics among the others. Thus, it is concluded that there were changes in the water quality parameters between the analyzed period, mainly in the direction of the underground flow of the non-continuous temporary suspended aquifer.