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.

Find a Professional

Team huddle


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.

Learn More about Joining

Woman using smart phone

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.

Browse Resources

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.

Learn More

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.

Learn More About Training

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.

Learn More


Find older issues of OOWA’s newsletter below. To stay up to date on our news and events please subscribe to our newsletter or follow us on …

View Archive

Latest News & Events

First Video Contest Entry!

We are excited to share with you our first submission to OOWA’s video contest! Thanks to Bill Goodale for preparing this. The gauntlet has been thrown! View the video on our YouTube channel. Remember, the deadline for submissions is Friday, March 5th! Get all the details and submission guidelines. […]

Read More…

OOWA Announces A Video Contest that Celebrates our Shared Industry

We all know that 2020 was a tough year and that 2021 is starting off with its own challenges.  So, let’s leave it all behind us for a short time to have some fun.  OOWA’s Communications Committee is excited to announce our first ever video contest!  We are looking for some upbeat homemade videos that […]

Read More…

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 […]

Read More…

View all News