Septic System installation COVID-19 is a serious threat to our health. OOWA’s staff, its committees and its Board of Directors are all actively working to help our members serve their communities safely. Learn More

OOWA is an industry leader in education and advocacy for onsite sewage systems, commonly known as septic systems, and decentralized wastewater management in Ontario

Image courtesy of Peterborough Public Health, Photo by Wayne Eardley

Find a Professional

OOWA is dedicated to providing access to a large network of onsite wastewater professionals throughout Ontario. Our members include a wide range of disciplines such as septic system design and installation to septic tank pump-outs, repair, and inspections.

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When you become a member of OOWA, you are joining a network of engaged professionals who are leaders in the onsite industry and in their communities. Our members have access to leading continuing education resources and association benefits.

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Homeowner Resources

Our goal is to help homeowners find resources about septic systems. Learn more about how septic systems work, how to prolong their life, how to get one installed on your property, and why onsite wastewater management is good for your property and the environment.

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About OOWA

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 across the province. We work closely with industry professionals as well as policymakers and enforcement authorities, academics, researchers, and teachers.

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Make ELJEN your 2021 resolution!


Our members have access to quality education and training across the province. OOWA recognizes a number of educational providers who offer a wide variety of courses and training schedules. Courses delivered by these recognized providers may be used towards accreditation and experience requirements needed to qualify for the Registered Professional Program.

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Best Practice Documents

OOWA’s Onsite Technical Committee (OTC) has prepared two peer-reviewed guidance documents with the goal of providing clarification and uniform practices regarding the installation of sand filter beds and pump chambers.

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Latest News & Events

Convention Closing Remarks

OOWA has put together a brief closing remarks video for our first virtual convention. Please take a minute to watch it. We had a great turn out and excellent interaction during the live sessions and the Q&A periods. Again, thanks to all who attended, to our sponsors and to our speakers! Follow this link to […]

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OOWA Convention Program & Spring Newsletter Now Available!

Highlights of this edition: Onsite technology solves challenges of meat processing plant wastewater 2021 virtual convention agenda Convention speaker profiles Clarification of re-inspection program process The rural revolution is here Demystifying the shallow buried trench Installation of phosphorous removal system in sensitive watershed Member profiles […]

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OOWA’s 2020-2025 Strategic Plan

OOWA’s Board of Directors and its working committees are proud to release our 2020-2025 Strategic Plan. This document lays out the organization’s vision, mission and core values. OOWA’s committees will be using this document as a guide to plan our activities over the next 5 years. Much thought and work went into this document, so […]

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