Jonathan W. Kahn
Partner | Toronto
Toronto: 416-863-3868

Detailed Profile

Jonathan Kahn, a partner in the Toronto office of Blake, Cassels & Graydon LLP, is widely regarded as one of Canada's leading environmental lawyers. He has, for more than 25 years, provided representation and advice on a broad range of environmental and natural resources law issues.

He routinely represents clients on the purchase, sale, and remediation of contaminated land, mining regulation and permitting; management of natural resources; the transportation, handling and disposal of hazardous substances; environmental permitting; air, water and waste regulation; lender liability; and other environmental matters.

Jonathan's wide-ranging expertise also includes representing accused corporations in significant environmental prosecutions; acting for proponents in major mining, renewable energy and infrastructure projects and providing environmental law advice on a range of significant transactions. Jonathan's clients span a wide spectrum of industries, including chemical, mining, construction, oil and gas, transportation, general manufacturing, automotive, food and beverage and agribusiness.

Jonathan is an officer of the American Bar Association's Section of Environment, Energy and Resources Law, the first non-American to serve on that organization''s Executive Committee. He became a member of that section's Governing Council in 2012 after serving as chair of several substantive committees. In 2011, he was the first non-American to chair the ABA's Annual Conference on Environmental Law. Jonathan served as Chair of the National Environment, Energy and Resources Law Section of the Canadian Bar Association in 2012-13. He is also a former chair of the Environmental Law Section of the Ontario Bar Association.


Jonathan is regularly recognized as a leading Canadian environmental lawyer in publications including:

  • Chambers Global: The World's Leading Lawyers for Business 2019 (Band 1 - Environment)

  • Who's Who Legal 2018: Environmental Lawyer of the Year

  • Who's Who Legal: Environment (one of 15 "Most Highly Regarded Individuals" globally in the 2014 and 2015 editions)

  • Who's Who Legal: Canada

  • The Legal 500 Canada (Environment)

  • The Canadian Legal Lexpert Directory

  • The Best Lawyers in Canada

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Blakes Bulletin on Environmental Law, March 11, 2016.
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