Journal of Water and Health Vol 6 No 3 pp 383–388 © IWA Publishing 2008 doi:10.2166/wh.2008.046
Occurrence of Cryptosporidium oocysts and Giardia cysts in Norwegian groundwater wells in bedrock
Sylvi Gaut, Atle Dagestad, Lucy Robertson, Bjørn Gjerde, Bjørge Brattli and Sylvi Gaut
Department of Groundwater, Geological Survey of Norway, 7491, Trondheim, Norway Tel.: +47-73904000 Fax: +47 73921620 sylvi.gaut@ngu.no
Department of Food Safety and Infection Biology, Norwegian School of Veterinary Science, P.O. Box 8146 Dep, 0033, Oslo, Norway
Department of Geology and Mineral Resources Engineering, Norwegian University of Science and Technology, 7491, Trondheim, Norway
ABSTRACT
The occurrence of Cryptosporidium oocysts and Giardia cysts in Norwegian groundwater wells in bedrock has been investigated for the first time. Wells close to risk areas such as farming and septic tanks were chosen. In all, 20 water samples from 20 different waterworks were collected. The samples were analysed for Cryptosporidium and Giardia, using US EPA Method 1623. Turbidity was also measured. Water samples from 10 of the waterworks were also analysed for Clostridium perfringens by membrane filtration. Cryptosporidium was detected in the groundwater samples from 3 of the waterworks. Giardia and Clostridium perfringens were not detected. Too few samples were analysed to verify whether Giardia is indeed absent from bedrock wells, and further studies are recommended to give more reliable data.
Keywords: Clostridium perfringens; Cryptosporidium; drinking water; Giardia; groundwater in bedrock
Full article (PDF Format)
PAY-PER-VIEW: Buy this article for £20.00 (IWA MEMBER PRICE: £15.00)
|
