Investigating emerging microbiological risks in local river water used by water treatment plants in the Paris metropolitan area

Thierry Chesnot; Marc Delbec; Claude Mignard; Jean Duchemin; Bénédicte Welté; Pierre Pieronne; Christelle Pagotto; Catherine Paffoni; Bénédicte Guéry

doi:10.1684/ers.2012.0546



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Investigating emerging microbiological risks in local river water used by water treatment plants in the Paris metropolitan area
Environnement, Risques & Santé. Volume 11, Number 4, 298-304, Juillet-Août 2012, Article original
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Author(s) : Thierry Chesnot, Marc Delbec, Claude Mignard, Jean Duchemin, Bénédicte Welté, Pierre Pieronne, Christelle Pagotto, Catherine Paffoni, Bénédicte Guéry
Summary : The drinking water treatment plants of the greater Paris metropolitan area have as their principal sources of raw water the Seine and its tributaries (the Oise and Marne). To verify the efficacy of existing disinfection systems against “emerging” infectious agents ( Campylobacter, parasites and viruses), we conducted a one-year monitoring campaign upstream and downstream from Paris, in various climatic conditions. The results show low levels of parasites and of hepatitis A virus, but substantial peaks of Astrovirus, Rotavirus and Norovirus GII in raw water. The multibarrier treatment plants are nevertheless able to control them.
Keywords : emerging risks, water microbiology