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The water quality in drinking water or raw water supplies in the Colombian Caribbean region was evaluated using the risk index for water quality (IRCA) and the water quality index (IAP) proposed by CETESB, Brazil. The following towns were selected: Mahates, supplied with surface water from the Canal del Dique, San Joaquín, Malagana and San Basilio de Palenque, which use groundwater, and Mandinga,...