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Avaliação da exposição e o risco associado com compostos trihalometanos na água potável Ferreira, Aldo Pacheco & da Cunha, Cynara de Lourdes Nóbrega Resumo Objetivo:Medir as concentracoes de Trihalometanos (THM) na rede de distribuicao de agua potavel da Baixada de Jacarepagua, Rio de Janeiro-RJ, Brasil, e seus riscos associados. Metodos: Duzentas casas foram visitadas e coletaram-se amostras de agua das torneiras dos consumidores. Estimativas de riscos baseadas em exposicoes foram projetadas, empregando abordagens deterministicas e probabilisticas.Resultados:Os THMs (dibromoclorometano, bromoformio, cloroformio e bromodiclorometano) variaram de 3,08 μg/l a 129,31 μg/l. Riscos nao cancerigenos induzidos por ingestao de THMs foram abaixo do nivel toleravel (10-6).Conclusao:Os dados obtidos nesta pesquisa demonstram que a exposicao aos contaminantes da agua potavel e os riscos associados foram superiores ao nivel aceitavel. Palavras-chave Água Potável; Risco; Trialometanos

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EXPOSURE ASSESSMENT AND THE RISK ASSOCIATED WITH TRIHALOMETHANES COMPOUNDS IN DRINKING WATER Ferreira, Aldo Pacheco & da Cunha, Cynara de Lourdes Nóbrega Abstract Objective: To measure the concentrations of trihalomethanes (THMs) in marshland of Jacarepagua drinking water, Rio de Janeiro-RJ, Brazil, and their associated risks. Methods: Two hundred houses were visited and samples were collected from consumer taps water. Risks estimates based on exposures were projected by employing deterministic and probabilistic approaches. Results: The THMs (dibromochloromethane, bromoform, chloroform, and bromodichloromethane) ranged from 3.08 μg/l to 129.31 μg/l. Non-carcinogenic risks induced by ingestion of THMs were below the tolerable level (10-6). Conclusion: Data obtained in this research demonstrate that exposure to drinking water contaminants and associated risks were higher than the acceptable level. Keywords Drinking water; Risk; Trihalomethanes

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