Abstract:ResumoEste trabalho constituiu um estudo do tipo transversal, que objetivou avaliar a possível associação entre a exposição a trialometanos presentes na rede pública de abastecimento de água da região metropolitana de São Paulo e a ocorrência de desfechos adversos na gravidez. Para a realização deste estudo, foram selecionados 19 municípios da região metropolitana de São Paulo que eram abastecidos por apenas uma estação de tratamento de água, no período de 1998 a 2002. Partiu-se da verificação dos ní-veis de t… Show more
“…The use of chlorine as a disinfection agent in water treatment is associated with the traditional sanitary measures and has brought undeniable benefits to society, as the decline of morbidmortality resulting from pathogens of hydric propagation 3,7 .…”
The reduction of the incidence of water-borne diseases is achieved with the diffusion of the use of chlorination techniques. However, in spite of the benefits of this disinfection method, the reactions of chlorine with the natural organic matter occurring in the water induce the production of disinfection by products such as trihalomethanes. These products have already been associated with the incidence of some cancers types. Considering that in the Brazilian legislation, it is not mandatory measuring and controlling the occurrence of trihalomethanes at the exitand during the water distribution to the consumer. This study aimed at analyzing the relationship between chlorination and its by products. Thus, this project evaluated the concentrations of trihalomethanes in water collected at different points of supply in the municipality of Colombo, Paraná, Brazil, during the period from November 2015 to February 2016. Chromatographic methods were employed, besides the spreadsheets provided by the Health Surveillance of Colombo for comparison. The found values were tabulated and they were compared with the limits established by the Brazilian Ministry of Health- Ordinance No 05/2017. The results confirmed that the values of those provided by the concessionaire responsible for the city water treatment and supply, and being within the standards determined by the legislation.
“…The use of chlorine as a disinfection agent in water treatment is associated with the traditional sanitary measures and has brought undeniable benefits to society, as the decline of morbidmortality resulting from pathogens of hydric propagation 3,7 .…”
The reduction of the incidence of water-borne diseases is achieved with the diffusion of the use of chlorination techniques. However, in spite of the benefits of this disinfection method, the reactions of chlorine with the natural organic matter occurring in the water induce the production of disinfection by products such as trihalomethanes. These products have already been associated with the incidence of some cancers types. Considering that in the Brazilian legislation, it is not mandatory measuring and controlling the occurrence of trihalomethanes at the exitand during the water distribution to the consumer. This study aimed at analyzing the relationship between chlorination and its by products. Thus, this project evaluated the concentrations of trihalomethanes in water collected at different points of supply in the municipality of Colombo, Paraná, Brazil, during the period from November 2015 to February 2016. Chromatographic methods were employed, besides the spreadsheets provided by the Health Surveillance of Colombo for comparison. The found values were tabulated and they were compared with the limits established by the Brazilian Ministry of Health- Ordinance No 05/2017. The results confirmed that the values of those provided by the concessionaire responsible for the city water treatment and supply, and being within the standards determined by the legislation.
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