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Who Pooped in the Watershed: a Closer Look at Sources of E. coli in 4 Headwater Streams Supplying Drinking Water in South-Central BC

Microbial contamination of source water is a major environmental and   health concern with drinking water in British Columbia (BC), Canada,   and worldwide. Non-point sources of fecal contamination is difficult   to determine. This project investigated concentrations and sources   of fecal bacteria over 2 years from 4 watersheds with drinking water   intakes. Over 48   E. coli isolates were classified to source using   ribotyping. Results of this study showed that the concentration of   fecal coliforms (FC) varied by year, month, and site, for each of   the watersheds sampled. For both years, the lowest FC concentrations   tended to be at the highest elevation sites followed by the drinking   water intake site at the lowest elevation. The sources of E. coli   varied significantly with stream for 2  3 and 2  4 (P<  .  1,   df=39), although the main sources of E. coli (avian, deer/elk,   canine, rodent, bovine, and bear) tended to be similar between   watersheds. The 3 dominant sources of E. coli changed from 2  3   (avian, deer/elk, and canine) to 2  4 (avian, bovine, and rodent).   It is important to look at the results from more than 1 year of   source tracking data to get a clearer picture of the dominant   sources within a watershed. Overall, wildlife was the largest   contributor of E. coli to the watersheds in both 2  3 (> 84 %) and   2  4 (> 73%).    (microbial source tracking); (MST); (bacterial source tracking);   (BST)

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Klaas BroersmaPrincipal Investigator
Associated with 1 projects
Rick NordinResearcher
Associated with 1 projects
Asit MazumderResearcher
Associated with 1 projects
Cindy MeaysResearcher
Associated with 1 projects

Funding 1 projects for a total of $197,000.00

Funding 1 projects for a total of $197,000.00

Funding 1 projects for a total of $49,000.00

Funding 1 projects for a total of $12,000.00
Scope of Study
Field and Modeling
Laboratory Investigation
Resource Being Monitored
Emission / Release / Discharge / Waste Management
Human Health
Beneficial Use Impairment Assessments
Restrictions on Drinking Water Consumption or Taste and Odour Problems

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