OOWA is the fastest-growing network of onsite wastewater professionals in Ontario!

Onsite Wastewater Education & Representation

The Ontario Onsite Wastewater Association (OOWA) is dedicated to representing and educating members within the onsite and decentralized wastewater industry in Ontario. Our members are among the most well respected practitioners in the industry: Educators, regulators, engineers, contractors, manufacturers, suppliers, service providers, and other parties dedicated to providing the best onsite wastewater industry services available, while working to preserve Ontario’s water resources and environment.

Fall/Winter Edition of Onsite now Available

OOWA’s Media Relations Committee is proud to issue your Fall/Winter Edition of Onsite. Onsite is OOWA’s print newsletter that is produced three times a year.  In it, you will find regulatory updates, information on industry trends and new technologies, case studies, profiles of our members and important association news.

Read more

Join OOWA

Exclusive access to important industry information, stakeholder representation at government events, access to the industry’s premiere newsletter, listings on our website, and big savings through our Partners Program.

Learn more about Membership

Connect to a Member

Onsite wastewater educators, regulators, engineers, contractors, manufacturers, suppliers, service providers, and more.

Search our Membership Directory