May 2011 : Environment Canada – PRESENCE AND LEVELS OF PRIORITY PESTICIDES In Selected Canadian Aquatic Ecosystems

Drinking Water Guidelines allow for 100,000 ng/L or 100,000 Parts Per Trillion with a pesticide like 2,4-D 

The Environment Canada finding indicate in a worst case senario that 2,4-D was found at 589 Parts Per Trillion

MCPA was the only pesticide to be highest in numbers and it was still more than 2 times lower than the allowable limit.

Atrazine was detected in many tests but the samples found were so tiny that it almost didn't register as a detection.

This study was conducted all over Canada from 2003-2005.



This report represents the culmination of Canada’s first National Water Quality Surveillance Program focused on current-use pesticides in vulnerable aquatic ecosystems and source waters.

Funded by Environment Canada’s Pesticide Science Fund, the surveillance program was conducted over a period of three years from 2003 to 2005. It was coordinated by the National

Water Quality Monitoring Office, Environment Canada, and implemented in Environment Canada’s regional offices. Several provincial environment ministries and other federal

departments also played important roles in collecting data for this program. These partners included the Prince Edward Island Department of Environment, Energy and Forestry; the Nova

Scotia Department of Environment and Labour; the New Brunswick Department of Environment, Le Ministère du Développement durable, de l’Environnement et des Parcs du Québec and

Agriculture and Agri-Food Canada’s Fredericton, New Brunswick, and Kentville, Nova Scotia, research centres. This report was coordinated and edited by Environment Canada’s National

Water Quality Monitoring Office, with substantial input from Environment Canada water quality monitoring staff across Canada. Writing assistance was obtained from Cantox Environmental Inc.

of Ottawa.

Environment Canada’s national Pesticide Science Fund Water Quality Surveillance team was represented on this project by the following scientists:

Janine Murray, Don Andersen, Rob Kent

National Water Quality Monitoring Office, Ottawa, ON

Taina Tuominen, Mark Sekela, Melissa Gledhill

Pacific and Yukon Water Quality Monitoring and Surveillance, Vancouver, BC

John Pasternak, Jen-ni Kuo, Mike Wan

Pacific and Yukon Environmental Protection, Vancouver, BC

David Donald, Nancy Glozier

Prairie and Northern Water Quality Monitoring and Surveillance, Regina and Saskatoon,SK

John Struger

Ontario Water Quality Monitoring and Surveillance, Burlington, ON

Myriam Rondeau

Quebec Water Quality Monitoring and Surveillance, Montreal, QC

Clair Murphy

Atlantic Environmental Protection, Charlottetown, PEI

Derek Muir, Camilla Teixeira, Chris Marvin, Allan Cessna

National Water Research Institute, Burlington, ON and Saskatoon, SK

Ed Sverko, Richard Strub

Analytical Laboratories, Burlington1, ON and Vancouver, BC