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City of Edmonton Use of Chlorpyrifos

The Office of the City Auditor in 2017 reviewed the use of all pesticides by the City of Edmonton, including chlorpyrifos. This audit is being used to help guide informed decisions around pesticide use and policy in the City of Edmonton.

  • All pesticides used by the City of Edmonton are approved for those uses by Health Canada’s Pest Management Regulatory Agency, and Alberta Environment and Parks.
  • The City of Edmonton complies with federal, provincial and municipal regulations in regards to pesticide use.
  • The City of Edmonton’s chlorpyrifos use is limited to control of larval mosquitoes in temporary ditch habitat in rural areas around the city, at least 40 m from any occupied buildings. In residential areas, only bacterial products (Bti) are used. This limits potential human exposure, as well as impact on other organisms.
  • Effective control of pest species, including invasive species and disease vectors requires the use of pesticides. Limiting access to effective tools leads to using larger quantities of less effective products. This leads to the development of pesticide resistance in insects, making the products even less effective.
  • The City of Edmonton’s use of chlorpyrifos has steadily decreased over the years as more viable alternatives and advancements come available, but there are some uses where there are currently no effective alternatives.
  • From an average of 995 kg/yr used between 1993-1997, the city used only 7.5 kg of chlorpyrifos in 2016.

City of Edmonton Mosquito Pesticide Usage (1993-2016)

Further Facts About Chlorpyrifos

  • Chlorpyrifos is one of the most widely used agricultural insecticides in the world. Corn production is the primary use in North America, but it is also used on canola, soybeans, fruit and nut trees, brussels sprouts, cranberries, broccoli, cauliflower and other row crops.
  • Other control programs across Canada use chlorpyrifos for mosquito control, management of pests such as mountain pine beetle, and the treatment of native bark beetles on elm trees in residential neighbourhoods to prevent the spread of Dutch elm disease.
  • Non-agricultural uses include golf courses, turf, green houses and on non-structural wood treatments such as utility poles and fence posts. In the United States, it is also registered for use for control of flying adult mosquitoes in mist sprayers.
  • In 2013 approximately 36,000 kg of chlorpyrifos was sold in Alberta for agricultural use (Overview of 2013 Pesticide Sales in Alberta- Aug 2015). In comparison the City of Edmonton used 3.5 kg of chlorpyrifos for control of mosquito larvae in rural ditch areas in 2017.
  • There are over 20 chlorpyrifos products registered for use in Canada.

For More Information

Pest Management

12304 107 Street NW
Edmonton AB  T5G 2S7


In Edmonton: 311

Outside Edmonton: 780-442-5311

Fax 780-496-4978

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