AVALIAÇÃO DA QUALIDADE DA ÁGUA DO RIO DOCE PARA FINS DE ABASTECIMENTO HUMANO POR MEIO DO IQA NA CIDADE DE COLATINA – ES

The main objective of this paper is to evaluate the water quality of the Doceriver,at pointRDC1D020,which is located in the second bridgeinColatina city -ES. The study was done through the IQA method, an evaluation system that seeks to bring results that can be easily understood by the population. The classification on this method varies from great to very bad. Each classificationalsohas a specific color. The calculation has nine parameters: thermotolerant coliforms, pH, dissolved oxygen (DO), biochemical oxygen demand (BOD), total nitrogen, total phosphorus, total solids, temperature difference and turbidity. These parameters indicate several water characteristics, important for their qualification and classification for human consumption. The study analyzed water quality over a period of seven years, from 2009 to 2015. Through the results of the calculations, water was classified as good, this represents a IQA number that ranges from 65 to 68. Although the water is suitable for human consumption, it is concluded that water quality can still be improved, in order tobe classified as great.