Ontario Wastewater Association

The Ontario Onsite Wastewater Association (OOWA), established in 1999, is a provincial not-for-profit with a local presence in downtown Peterborough. OOWA champions sustainable onsite and decentralized wastewater management through education, advocacy, and promoting best practices. They connect homeowners with qualified professionals for septic system design, installation, and maintenance, helping to protect our shared freshwater resources.