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Onsite Wastewater Mega-Conference

See you in Spokane October 20-23! 

Exhibitor and Attendee Registration will OPEN in late June or early July. Watch here for more details. 


In recognition of the 50th anniversary of Expo '74 in Spokane, WA, the first environmentally-focused World's Fair, the Mega-Conference theme for 2024 is:

Celebrating Tomorrow’s Environment: Clean Water for the Future

Don't Miss Out on the Onsite Event of the year!

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 2024 Onsite Wastewater Mega-Conference will be held October 20 - 23, 2024 in Spokane, Washington in cooperation with NOWRA's state affiliates, the Washington On-Site Sewage Association (WOSSA) and the Oregon Onsite Wastewater Association (O2WA).

Join the country's go-to onsite wastewater organization for training opportunities, industry updates, & professional services—and to make sure your voice is heard in Washington.

Become a Member