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Environment • Aboriginal • Energy

Madiha Vallani


T: 416-862-4835  E:


Madiha Vallani is an associate lawyer practicing environmental law and litigation, Indigenous law, and energy law.  Madiha draws on her background in environmental studies, geography, and environmental management to understand complex environmental legal problems and assist clients develop pragmatic solutions.  Madiha is called to the bar in Ontario.

Environmental Law

Madiha supports a wide variety of clients with environmental compliance matters, and assists them to understand their environmental regulatory requirements and responsibilities.  Madiha has experience with environmental aspects of business transactions including the purchase and sale of contaminated land.

Environmental Litigation

Madiha advocates for clients in environmental civil proceedings, administrative proceedings, and regulatory prosecutions.  Madiha assists clients to appeal Ministry Orders and Approvals to the Environmental Review Tribunal, and litigates contaminated land disputes before Ontario’s Courts.

Energy and Natural Resources Law

Madiha advises clients intervening before the Ontario Energy Board on natural gas and electricity matters.

Indigenous and Northern Law

Madiha advises First Nation, Métis, and Inuit communities, resource proponents, governments, and environmental boards on natural resource and environmental law matters.

Prior Environmental Experience

  • In law school, Madiha’s team placed third in the 2017 Willms & Shier Environmental Law Moot Court Competition
  • Madiha provided Pro Bono legal support to a grassroots charity dedicated to protecting the Ottawa River from environmental threats and assisted in developing legal solutions to preserve river health
  • As a research assistant to an environmental law professor, Madiha conducted legal research on the intersection between the Sustainable Development Goals and human rights discourse to develop a book chapter
  • During her undergraduate degree, Madiha spent eight months working abroad in Vietnam at a grassroots water conservation organization, and assisted in drafting a literature review for hydropower development in the Mekong River Basin


  • Industrial companies
  • Land developers, property owners, landlords and tenants
  • Engineering and consulting firms
  • Insurers and financial institutions
  • Construction sector
  • Indigenous communities and businesses
  • Environmental boards and tribunals
  • Municipalities
  • Individuals

Representative Work

Environmental Law

  • Environmental Site Assessment and Review—Assisted a transportation company to better understand the environmental condition of its sites including environmental risks and liabilities at the sites, and to develop an environmental management program
  • Transactional Environmental Due Diligence and Risk Assessment—Assisted with environmental due diligence advice to a property developer for the purchase of contaminated property and risk assessment of off-site migration of contaminants
  • Permits to Take Water Legal Regime—Assisted a water company with legal aspects of the Permits to Take Water regime in Ontario

Environmental Litigation

  • Appeal of an Environmental Compliance Approval—Assisted a transportation industry supplier to appeal the amended conditions of its environmental compliance approval to the Environmental Review Tribunal
  • Insurance Claim—Assisted individual homeowners in a damages claim against a company and insurer for adverse health impacts and loss of property
  • Civil Claim for Environmental Damages—Assisted a business corporation seeking damages arising from migrating contamination from a neighbouring property
  • Defence of Prosecution—Assisted a construction company facing municipal Sewer By-law charges

Energy and Natural Resources Law

  • Intervention in Energy Board Hearing—Assisted an environmental non-profit organization to intervene at the Ontario Energy Board in various energy proceedings related to natural gas and energy conservation

Indigenous and Northern Law

  • Negotiation of Impact Benefit AgreementAssisted a mining company to negotiate an impact benefit agreement for a mining project
  • Advice to Northern Board on Administrative Law Procedures—Assisted a northern resource board with remedies available to administrative decision-making bodies when reconsidering a decision






  • Canadian Bar Association (CBA)—member
  • Ontario Bar Association (OBA)—member
  • Law Society of Ontario—member


  • Called to the bar of Ontario (2019)
  • LL.M., Environmental and Constitutional Law, Western University (2018)
  • J.D., University of Ottawa (2017)
  • BES., Hons. International Development (major), Geography and Environmental Management (minor) (2013)


"Willms & Shier is a bluechip environmental law firm."

Judge of the Ontario Superior Court of Justice