2,4,5-T Herbicide and Health Concerns

Important Update


Release of Report by Ontario Independent Fact-Finding Panel on Herbicide 2,4,5-T


The Ontario Independent Fact-Finding Panel on Herbicide 2,4,5-T has submitted its report on June 13, 2013.


The Ontario Minister of Natural Resources established the Ontario Independent Fact-Finding Panel on Herbicide 2,4,5-T to determine where, when and how 2,4,5-T herbicide was used in Ontario by government ministries and agencies, and whether exposure may have potential health impacts. The report presents the findings of the panel's work.

You can request a paper copy of the panel's report from ServiceOntario at www.serviceontario.ca/publications or call toll-free 1-800-668-9938; TTY/Teletypewriter (for the hearing impaired) toll-free: 1-800-268-7095.


The Ontario government is reviewing the panel's report to determine if additional steps need to be taken to address the findings.

Historical 2,4,5-T Records


The Ontario government collected historical records relating to the herbicide 2,4,5-T from Ontario ministries and agencies. The search found 4,747 records spanning more than six decades. The records were provided to the panel to assist them in their work, and the government also committed to making the records available to the public. The records have been posted online in PDF format, where you can read and download them.

If You Have Health Concerns


The health and safety of all Ontarians is vitally important.


If you have concerns about potential past workplace exposure to 2,4,5-T, please call the Workplace Safety and Insurance Board (WSIB) at 1-800-387-0750. Information is also available on the WSIB website at wsib.on.ca.


The WSIB is committed to working with Ontarians who may have been exposed to herbicides in the workplace and contracted a work-related illness. The WSIB will also be reviewing the panel's report.


Anyone with health concerns related to possible 2,4,5-T exposure is encouraged to consult with their doctor.


For further information, you may wish to contact our toll-free information line at 1-888-338-3364.


About the Herbicide 2,4,5-T


The herbicide known as 2,4,5-T was used in the 1950s, 60s and 70s for weed and brush control by sectors such as forestry, transportation and agricultural sectors (for non-crop land). 2,4,5-T was used across the province in various locations, including hydro rights-of-way, along roadsides and highways, and for forestry activities.


Ontario suspended the use of 2,4,5-T in 1979 and banned it in 1980. The federal government deregistered the product in 1985.


Current Use of Herbicides in Ontario


All herbicides must be deemed safe for our health and environment by the federal government before they can be used.


Ontario has a comprehensive regulatory framework based on science and stringent requirements that control how herbicides are sold, transported, used, stored and disposed.


Ontario laws require licences for selling and applying herbicides and other pesticides commercially and for operating pest control businesses. The province also provides education and training on responsible herbicide use, and through compliance and enforcement ensures that our stringent requirements are being met.


About the Ontario Independent Fact-Finding Panel on Herbicide 2,4,5-T