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

New Provincial COVID 19 Restrictions: Clarification for OOWA Members

On Tuesday, January 12th,  Doug Ford announced a provincial stay-at-home order in addition to new restrictions to non-essential trips outside the home. “Our province is in crisis,” Premier Doug Ford said as part of the announcement. Regarding avoiding non-essential travel Doug continued, “I know essential means different things to different people …so we need everyone to use […]

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Festive Septic Maintenance Reminder

Anne Egan, P.Eng., Onsite Wastewater Specialist with Burnside and OOWA past president, engineered this gingerbread diorama of a failed septic system and it is genius! A festive reminder to take care of your septic system over the holidays and during lockdown! Get septic guidance on our Homeowner Resources webpage. […]

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2019/2020 Small Business Owner of the Year Award Announcement

Belated congratulations to Kirk Hastings and Penny Brake of Onsite Septic Solutions for being the recipients of our 2019/2020 small business owners award! Kirk and Penny are engaged OOWA members and we are proud to hold them up as exemplary professionals in the onsite wastewater industry. Bill Goodale of Tatham Engineering/Tiny Township and OOWA VP […]

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