Source and occurrence of Giardia and Cryptosporidium in Paris rivers

This paper presents an investigation of the variability of concentrations of Giardia cyst and Cryptosporidium oocyst in two main rivers of Ile-de-France: the Seine (upstream from Paris) and its largest tributary: the Marne. The first goal of this study was to examine risk of presence of Cryptosporid...

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Bibliographic Details
Published in:Water science and technology 2000-01, Vol.41 (7), p.79-86
Main Authors: ROUQUET, V, HOMER, F, BRIGNON, J. M, BONNE, P, CAVARD, J
Format: Article
Language:English
Subjects:
Air. Soil. Water. Waste. Feeding
Applied sciences
Biological and medical sciences
Continental surface waters
Cryptosporidium
Cysts
Drinking water
Environment. Living conditions
Exact sciences and technology
France
France, Marne R
France, Paris
France, Seine R
Giardia
Medical sciences
Microorganisms
Natural water pollution
Parasites
Pathogens
Point source pollution
Pollution
Pollution sources
Public health. Hygiene
Public health. Hygiene-occupational medicine
Rain
Raw water
Resuspension
Rivers
Sedimentation
Upstream
Urban runoff
Wastewater
Wastewater discharges
Water quality
Water quality measurements
Water treatment
Water treatment and pollution
Water treatment plants
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Summary:This paper presents an investigation of the variability of concentrations of Giardia cyst and Cryptosporidium oocyst in two main rivers of Ile-de-France: the Seine (upstream from Paris) and its largest tributary: the Marne. The first goal of this study was to examine risk of presence of Cryptosporidium and Giardia at the drinking water treatment plants' intakes at high concentrations. A second goal was to study the relationship between parasite concentrations and a variety of more easily measured water quality parameters (microbial or physicochemical) which could be used as risk indicators. Two aspects were particularly addressed: the influence of upstream waste water discharges, and the influence of rain fall and river floods on parasite concentrations. Preliminary results of an ongoing study are also presented: they show possible influence of non-point sources on parasite concentrations. Overall results show that parasite sedimentation in rivers is high, urban run-off and resuspension of particles could be at certain times the main factors responsible for peak pathogen levels in raw water.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.2000.0118