Origin and spatial–temporal distribution of faecal bacteria in a bay of Lake Geneva, Switzerland

Article Article scientifique Article Origin and spatial–temporal distribution of faecal bacteria in a bay of Lake Geneva, Switzerland eng 2009 author Pote-Wembonyama John 0000-0003-4091-749X 525637 author Goldscheider Nico author Haller Laurence author Zopfi Jakob author Khajehnouri Fereidoun 29228 author Wildi Walter 22744 337-348 10.1007/s10661-008-0401-8 0167-6369 http://link.springer.com/10.1007/s10661-008-0401-8 The origin and distribution of microbial contamination in Lake Geneva's most polluted bay were assessed using faecal indicator bacteria (FIB). The lake is used as drinking water, for recreation and fishing. During 1 year, water samples were taken at 23 points in the bay and three contamination sources: a wastewater treatment plant (WWTP), a river and a storm water outlet. Analyses included Escherichia coli, enterococci (ENT), total coliforms (TC), and heterotrophic plate counts (HPC). E. coli input flux rates from the WWTP can reach 2.5 × 1010 CFU/s; those from the river are one to three orders of magnitude lower. Different pathogenic Salmonella serotypes were identified in water from these sources. FIB levels in the bay are highly variable. Results demonstrate that (1) the WWTP outlet at 30 m depth impacts near-surface water quality during holomixis in winter; (2) when the lake is stratified, the effluent water is generally trapped below the thermocline; (3) during major floods, upwelling across the thermocline may occur; (4) the river permanently contributes to contamination, mainly near the river mouth and during floods, when the storm water outlet contributes additionally; (5) the lowest FIB levels in the near-surface water occur during low-flow periods in the bathing season. Water pollution Recreational water Drinking water Faecal indicator bacteria Microbial pathogens Salmonella Wastewater treatment plant Human health risk Lake Geneva Dewey 550 41 Département F.-A. Forel des sciences de l'environnement et de l'eau 153 false 1217 FORE9 Environmental microbiology 944 ISE Eau 938 ISE Pôle Sciences 753 Limnology and Environmental Geology Environmental monitoring and assessment 154 1-4 7db4526d-3cd5-4005-af45-8cf974cd3787 Article (Published version) Restricted art%3A10.1007%2Fs10661-008-0401-8.pdf 572500 application/pdf restrictedAccess Faculté des sciences / Section des sciences de la Terre et de l'Environnement / Département F.-A. Forel des sciences de l'environnement et de l'eau

Title	Published in	Year	Views	Downloads

Origin and spatial–temporal distribution of faecal bacteria in a bay of Lake Geneva, Switzerland	Environmental monitoring and assessment	2009	506	0
63Cu NQR spectra of dicoordinated Cu(I) cations with imidazole and pyrazole ligands	Journal of molecular structure	1995	704	422

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