Variations In The Quality Of Rainwater And Fluvial Reservoirs Stored In Cisterns In Municipalities Of The Semiarid Region Of Paraiba State

In this work, the temporal evolution of quality parameters and the analysis of the conformity of water stored in cisterns in the municipalities of Barra de Santana, Boqueirao, and Caturite in the semi-arid state of Paraiba are presented. The water stored in the cisterns studied comes from min and from Epitacio Pessoa fluvial reservoirs in the region of Cariri and Aracagi in the region of Brejo. The parameters analyzed were: pH, turbidity, electrical conductivity, total dissolved solids, total alkalinity, apparent color, total hardness, chlorides, ammonia, sulfate, nitrate, total coliforms, thermotolerant coliforms, Escherichia coli, and heterotrophic bacteria, with monthly frequency in the months of February to October 2017, in the midst of the 2011/2017 drought. Relevant variations were observed in the parameters of the water coming from fluvial reservoirs, mainly from Epitacio Pessoa due to the water supply of the sao Francisco river through the sao Francisco River Integration Project (Projeto de Integracao do Rio Sao Francisco - PISF). The results indicated that there were no significant changes in rainwater storage parameters in cisterns. Unlike cisterns with water from fluvial reservoirs, there was compliance in relation to Ordinance No. 5/2017 of the Ministry of Health for all the physical and chemical parameters analyzed in cisterns with rainwater.