Ontario Onsite Wastewater Association: Annual Convention & Expo

In 2025 Ontario Onsite Wastewater Association (OOWA) will be hosting our Annual Convention & Expo at the Ottawa Conference & Event Centre. We are thrilled to continue engaging minds and empowering success with all categories of professionals in the onsite and decentralized wastewater industry. Stay tuned to our emails, website, and social media to keep up to date on 2025 Convention news as it is released.