Next Article in Journal
Estimation of Seasonal Risk Caused by the Intake of Lead, Mercury and Cadmium through Freshwater Fish Consumption from Urban Water Reservoirs in Arid Areas of Northern Mexico
Next Article in Special Issue
Gonadal Disorder in the Thinlip Grey Mullet (Liza ramada, Risso 1827) as a Biomarker of Environmental Stress in Surface Waters
Previous Article in Journal
Field Testing of Alternative Cookstove Performance in a Rural Setting of Western India
Previous Article in Special Issue
Detection of Pathogenic Escherichia coli in Samples Collected at an Abattoir in Zaria, Nigeria and at Different Points in the Surrounding Environment
Article Menu

Export Article

Open AccessArticle
Int. J. Environ. Res. Public Health 2015, 12(2), 1788-1802; doi:10.3390/ijerph120201788

On-Line Monitoring of Escherichia coli in Raw Water at Oset Drinking Water Treatment Plant, Oslo (Norway)

Norwegian Institute for Water Research, Gaustadalléen 21, Oslo 0349, Norway
Norwegian University of Life Sciences, Ås 1432, Norway
Colifast AS, Strandveien 33, Lysaker 1366, Norway
Oslo Water and Sewerage Works, Midtoddveien 40, Oslo 0494, Norway
Author to whom correspondence should be addressed.
Academic Editor: Roberto Spurio
Received: 10 December 2014 / Revised: 31 December 2014 / Accepted: 27 January 2015 / Published: 4 February 2015
View Full-Text   |   Download PDF [1691 KB, uploaded 4 February 2015]   |  


The fully automated Colifast ALARMTM has been used for two years for daily monitoring of the presence/absence of Escherichia coli in 100 mL raw water at Oset drinking water treatment plant in Oslo, Norway. The raw water is extracted from 35 m depth from the Lake Maridalsvannet. E. coli was detected in 18% of the daily samples. In general, most samples positive for E. coli were observed during the autumn turnover periods, but even in some samples taken during warm and dry days in July, with stable temperature stratification in the lake, E. coli was detected. The daily samples gave useful additional information compared with the weekly routine samples about the hygienic raw water quality and the hygienic barrier efficiency of the lake under different weather conditions and seasons. The winter 2013/2014 was much warmer than the winter 2012/2013. The monitoring supported the hypothesis that warmer winters with shorter periods with ice cover on lakes, which may be a consequence of climate changes, may reduce the hygienic barrier efficiency in deep lakes used as drinking water sources. View Full-Text
Keywords: on-line monitoring; Escherichia coli; raw water; drinking water; climate change on-line monitoring; Escherichia coli; raw water; drinking water; climate change

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Tryland, I.; Eregno, F.E.; Braathen, H.; Khalaf, G.; Sjølander, I.; Fossum, M. On-Line Monitoring of Escherichia coli in Raw Water at Oset Drinking Water Treatment Plant, Oslo (Norway). Int. J. Environ. Res. Public Health 2015, 12, 1788-1802.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Int. J. Environ. Res. Public Health EISSN 1660-4601 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top