The Onsite Wastewater Mega-Conference is a national, collaborative effort between the National Onsite Wastewater Recycling Association (NOWRA), the National Association of Wastewater Technicians (NAWT), and the State Onsite Regulators Association (SORA).

The Mega-Conference is the largest event of its kind and offers onsite/decentralized professionals the highest quality education and training available.

The 2025 Onsite Wastewater Mega-Conference will be held October 19 – 22, 2025 in Sandusky, Ohio at the Kalahari Resort and Convention Center, in cooperation with NOWRA’s state affiliate, the Ohio Onsite Wastewater Association (OOWA).