In order to take samples of water for analysis in laboratory, two campaigns were conducted. For both campaigns we sampled from upstream to downstream of the lake (direction of flow of water from the quarry to the Mono River through the lake). The first campaign was carried out on June 28, 2018 for the characterization of the physico-chemical composition of the waters of the quarry, the drain (canal) and the lake. For this purpose, four (04) sampling sites were selected. The second campaign only on the lake, was effective September 03, 2018 to better understand its trophic state. On this occasion, two (02) sampling sites were chosen in the middle of the lake.