About The Ontario Onsite Wastewater Association

The Ontario Onsite Wastewater Association (OOWA) is a provincial not-for-profit association dedicated to promoting the benefit and value of onsite and decentralized wastewater management through education, improved standards of practice, and advocacy for sound policies. We support our network of knowledgeable professionals recognized as the foremost source of sustainable onsite and decentralized wastewater management expertise.

Centre Image courtesy of Peterborough Public Health, Photo by Wayne Eardley

Our membership is made up of a wide array of industry professionals, including installers, designers, technicians, inspectors, haulers, policymakers and enforcement authorities, academics, researchers, and teachers. The Association provides a valued connection between quality professionals with invaluable field experience, who are leaders and volunteers making a difference in the industry and the environment. OOWA is currently focused on helping to further develop best practices while growing the provincial market.


Together with our private and public partners, the Ontario Onsite Wastewater Association has been providing guidance and assistance to Ontario’s communities and system owners. Our goal is to further our advocacy through education and advice that helps to improve environmental protection. OOWA’s efforts are intended to help protect our shared freshwater resources and the critical infrastructure of rural property owners.

You can read about OOWA’s direction over the next five years by reviewing our 2020-2025 Strategic Plan. Click on the image to learn more.