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Cluster analysis performed with nine variables (temperature, pH, conductivity, turbidity, and concentrations of total and thermotolerant coliforms, E. coli, enterococci and SARS-CoV-2) measured in a total of 75 water samples collected in five sampling points: AR-1 and AR-2 in the Arenales River, MR-1 and MR-2 in the Mojotoro River, and CR in La Caldera River, from July to December 2020 (15 sampling events).
