Clean Technology

A reliable and high-performing cleantech sector

Ontario cleantech partners integrate environmental stewardship and resource efficiency with business success, providing reliability and resilience in a rapidly evolving sector. We are home to Canada’s largest cleantech sector, making up over one third of the national market. In 2022, Ontario businesses exported $7.16 billion in cleantech, reflecting an impressive 18.7% growth over five years. Anchored by the Toronto-Waterloo corridor—Canada’s top cleantech ecosystem and the 6th largest in North America—Ontario companies are transforming bold ideas into real-world solutions that benefit the planet and drive global progress.

Milestones like phasing out coal in 2014—the largest single greenhouse gas (GHG) reduction measure in North America — and achieving almost 90% emissions free energy production, highlight the province’s commitment to sustainability. This dedication is mirrored in the success of over 5,000 cleantech companies, with 3 companies ranked among the 2025 Global Cleantech 100 – e-Zinc, Enersion, and Cyclic Materials.

An accessible supply chain that reduces costs

Ontario’s cleantech sector benefits from Canada’s 15 free trade agreements covering 51 countries, ensuring most products ship virtually tariff-free to the Europe and many parts of Asia and South America. The province’s robust transportation infrastructure includes 13,000 km of railway, 30 ports, and 4 international airports, including Toronto Pearson International Airport—making it seamless to ship your products and services to all corners of the world.

Businesses operating here gain a competitive edge through the province’s energy-efficient ecosystem, where 87% of electricity comes from non-emitting sources. This low-cost, sustainable energy infrastructure supports both operational savings and environmental stewardship. Ontario companies ensure compliance with ethical and regulatory standards, providing transparency and expertise at every stage of the supply chain.

Who’s here

Ontario businesses provide diverse solutions to minimize environmental impacts, redesign supply chain processes, and manage product lifecycles to support a circular economy model.

• Accelera
• Ecobee
• E-Zinc
• GE Vernova
• Greenfield Global
• Green Mantra Technologies
• Hatch
• Heliene
• Hydrogen Optimized
• Hydrostor
• Pond Tech
• Schneider Electric
• Silfab Solar
• Trojan Technologies
• Veolia

Optimizing environmental benefits through WaterTech

With over 250,000 lakes, 100,000 kilometers of rivers, and the Great Lakes holding a fifth of the world’s fresh water, we know water and water technology. The province’s water technology sector is home to over 900 companies employing 22,000. Approximately 80% of which are exporters.

Excelling in water remediation, UV disinfection, and membrane filtration technologies, from hydrogeology to leak detection, repair, and SMART monitoring sensor systems, Ontario partners provide infrastructure, technologies, and engineering the solutions you need for clean water supply, conservation, and storm and wastewater management.

Thinking about the next generation

Our cleantech companies benefit from a diverse workforce, enabling them to develop groundbreaking technologies that align with international climate goals and maintain competitiveness in the global market. With a strong foundation in STEM disciplines, the province produces more than 70,000 graduates annually and is home to over 100 water-focused research institutes, universities, and colleges, all working to address global environmental challenges. This skilled workforce supports innovations from alternatives to single-use plastics to the future of clean energy through hydrogen solutions, making us Canada’s top filer of patents. With over 2,000 cleantech patents filed by 111 pure-play companies, we are ensuring Ontario remains a hub for transformative ideas and solutions that cater to your products and services.