Contact Sarah Gewurtz:

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Ph.D. Geography, University of Toronto

M.Sc. Biological Sciences, University of Windsor

B.Sc. (Hons.) Environmental Science, University of Guelph


Sarah Gewurtz

Physical Scientist - Special Projects Officer, Toxics, Water Quality Monitoring and Surveillance

CURRENT S&T / RESEARCH - Contributing to Environment Canada’s mandate to ensure that water is clean, safe and secure; Assessing risks to Canadians and their environment posed by pollutants or other harmful or dangerous substances

  • Collaborate with study leaders across Canada to compile National toxics data under the Chemicals Management Plan
  • Evaluate and report on the status and trends of priority contaminants in different media across Canada
  • Conduct surveillance studies on contaminants of concern in fish, aquatic food webs and waters in Canada
  • Develop data analysis and mathematical modeling tools to improve the assessment of biomonitoring data in aquatic food webs
  • Report on Canada’s water quality to meet commitments under the Chemicals Management Plan and the Great Lakes Water Quality Agreement in internal reports and peer reviewed publications


Gewurtz, S.B., Bhavsar, S.P., Jackson, D.A., Awad, E., Winter, J.G., Reiner, E.J., Moody, R., Fletcher, R. 2010. Trends of legacy and emerging-issue contaminants in Lake Simcoe fish. Journal of Great Lakes Research. Accepted.

Gewurtz, S.B., Bhavsar, S.P., Jackson, D.A., Fletcher, R., Awad, E., Moody, R., Reiner, E.J. 2010. Temporal and spatial trends of organochlorines and mercury in fishes from the St. Clair River/Lake St. Clair corridor, Canada. Journal of Great Lakes Research. 36: 100-112.

Gewurtz, S.B., Bhavsar, S.P., Crozier, P.W., Diamond, M.L., Helm, P.A., Marvin, C.H., Reiner, E.J. 2009. Perfluoroalkyl contaminants in window film: Indoor/outdoor, urban/rural, and winter/summer contamination and assessment of carpet as a possible source. Environmental Science and Technology. 43:7317-7323.

Gewurtz, S.B., Lega, R., Crozier, P.W., Whittle, D.M., Fayez, L., Reiner, E.J., Helm, P.A., Marvin, C.H., Tomy, G.T. 2009. Factors influencing trends of polychlorinated naphthalenes and other dioxin-like compounds in lake trout (Salvelinus namaycush) from Lake Ontario, North America (1979-2004). Environmental Toxicology and Chemistry. 28:921-930.

Gewurtz, S.B., Gandhi, N., Christensen, G.N., Evenset, A., Gregor, D., and Diamond, M.L. 2009. Use of a food web model to evaluate the factors responsible for high PCB fish concentrations in Lake Ellasjøen, a high arctic lake. Environmental Science and Pollution Research. 16:176-190.

Gewurtz, S.B., Shen, L., Helm, P.A., Waltho, J., Reiner, E.J., Painter, S., Brindle, I.D., Marvin, C.H. 2008. Spatial distributions of legacy contaminants in sediments of Lake Huron and Superior. Journal of Great Lakes Research. 34:153-168.

Gewurtz, S.B., Helm, P.A., Waltho, J., Stern, G.A., Reiner, E.J., Painter, S., and Marvin, C.H. 2007. Spatial distributions and temporal trends in sediment contamination in Lake St. Clair. Journal of Great Lakes Research. 33:668-685.

Gewurtz, S.B., Gandhi, N., Stern, G.A., Franzin, W.G., Rosenberg, B., and Diamond, M.L. 2006. Dynamics of PCBs in the food web of Lake Winnipeg. Journal of Great Lakes Research. 32:712-727.

Gewurtz, S.B., Laposa, R., Gandhi, N., Christensen, G.N., Evenset, A., Gregor, D., Diamond, M.L. 2006. A comparison of contaminant dynamics in arctic and temperate fish: A modeling approach. Chemosphere. 63:1328-1341.

Expertise Categories associated with this S&T Expert:

     Aquatic Ecosystems
Nature & Wildlife
     Effects of Toxics
          Brominated flame retardants (BFRs)
          Chemical and biological analysis
          Emerging chemicals
          Food web transfer
          Methods development
          Persistent organic pollutants (POPs)
Pollution & Waste
          Persistent organic pollutants (POPs)
          Persistent organic pollutants (POPs)
          Inland waters
     Great Lakes
          Water quality
     Water Quality
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