Ontario’s Voice for the Environment Industry

ONEIA is a non-partisan, member-driven industry association that brings together leaders from business, government, and academia. Our members actively engage with policymakers and key stakeholders to advance practical, market-ready solutions that address today’s environmental challenges while positioning Ontario for the opportunities of tomorrow.

Our work is guided by a clear strategic focus:

INFORM. CONNECT. LEAD.

For more than three decades, the Ontario Environment Industry Association (ONEIA) has been the leading voice of Ontario’s environment and cleantech sector. Representing companies and organizations across the province, ONEIA works to highlight the sector’s essential contributions to Ontario’s economy, infrastructure, and long-term competitiveness. While often working behind the scenes, the environment industry underpins the success of many of Ontario’s most critical sectors—supporting growth, resilience, and innovation across the economy.

Environment Industry Day

INFORM

Knowledge is the foundation of effective decision-making. ONEIA
creates opportunities to share insights, exchange expertise, and
explore the trends, challenges, and opportunities shaping Ontario’s
environment and cleantech sector.

CONNECT

ONEIA is where the environment industry comes together. Through
events, committees, and collaborative initiatives, we foster
meaningful connections among companies, innovators, and
partners—building a strong, engaged community that achieves
more collectively than individually.

‘Go Green on the Green’ Annual Industry Golf Tournament

Business + Policy Forum Sector Roundtables

LEAD

Grounded in sound science, a strong economy, and environmental
stewardship, ONEIA members are actively shaping solutions and
advancing progress. By working constructively with government
and stakeholders, ONEIA helps identify emerging issues and
opportunities, ensuring Ontario remains a sustainable, healthy,
and economically competitive place to live and do business.