Washington Onsite Sewage Association

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Puyallup, WA
Washington Onsite Sewage Association

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Founded in 1990, the Washington On-Site Sewage Association is a non-profit trade association serving the on-site wastewater industry.

With approximately 1.5 million decentralized wastewater systems in use, it is our mission as an association, with the help of our members, consumers and local government; to ensure that we put the water back into our communities the way we found it. Today the organization has grown to encompass all disciplines of the industry and has continued to expand its impact, and supports improvement in all of the industry's professions. These professional areas include regulators, designers, Installers, Operations and Maintenance support, and manufacturers/suppliers operating in the state of Washington. WOSSA has since been a leading onsite professional membership association for the onsite septic industry with key consideration to the Consumer, Public Health and the Environment.

10/13/2026

🥂 Thank you, Advanced Sewer Solutions Inc., for sponsoring the SEPTIC-CON 2027 Exhibitor Reception, Auction and Auction Dinner! Jan 29, Expo Hall.

10/07/2026

🎉 Welcome back, ! Proud to have you as the Title Sponsor of SEPTIC-CON 2027. Thank you for supporting the on-site wastewater community. See you in Tacoma, Jan 29-30!

10/02/2026

📍 See You in Tacoma!

SEPTIC-CON 2027 is heading back to the Greater Tacoma Convention Center - right in the heart of the city, walkable to hotels, restaurants, and the waterfront.

Whether it's your first SEPTIC-CON or your tenth, Tacoma is a great home base for two days of demos, training, and networking.

📅 Jan 29-30, 2027

👉 septiccon.org

09/28/2026

🙋 Why Hundreds of Septic Pros Make the Trip to Tacoma

Every January, installers, pumpers, regulators, maintainers and business owners from across the Western U.S. carve out two days for SEPTIC-CON. Why? Because it's the one event built specifically for this industry — real training, real equipment, real connections.

Whether you're a solo operator or run a growing crew, SEPTIC-CON 2027 is worth the trip.

📍 Greater Tacoma Convention Center | 📅 Jan 29-30, 2027

👉 septiccon.org

09/22/2026

🎤 KEYNOTE ANNOUNCEMENT 🎤

We are thrilled to welcome Adam Mendler as our keynote speaker for SEPTIC-CON 2027!

As a nationally recognized authority on leadership and the host of the top-rated business podcast Thirty Minute Mentors, Adam has spent years extracting insights from over 500 of America's most successful CEOs, founders, and elite athletes. His acclaimed frameworks have shaped leadership strategies across Fortune 500 companies - now, he brings that elite perspective to our industry.

This is a premier opportunity for our members to elevate their leadership potential.

📅 Save the Date: January 29-30, 2027📍
Location: Tacoma, WA

09/21/2026

⏰ 14 weeks until exhibitor pricing goes up!

Why book your exhibitor space early for SEPTIC-CON 2027?
✅ Lock in the lower rate before prices increase December 1
✅ More time to plan logistics and travel
✅ Get your business in front of hundreds of on-site wastewater professionals

👉 https://wossa.org/page/EXHIBITORREGISTRATION

09/17/2026

🙋 Why Hundreds of Septic Pros Make the Trip to Tacoma

Every January, installers, pumpers, regulators, maintainers and business owners from across the Western U.S. carve out two days for SEPTIC-CON. Why? Because it's the one event built specifically for this industry: real training, real equipment, real connections.

Whether you're a solo operator or run a growing crew, SEPTIC-CON 2027 is worth the trip.
📍 Greater Tacoma Convention Center | 📅 Jan 29-30, 2027
👉 septiccon.org

08/27/2026

WOSSA is growing our Instagram presence… the first (10) 2026 WOSSA Members to follow us on IG: .septiccon and also share this post, will WIN a WOSSA hat ($30 value) of your choosing!

Winners will be announced in the comments and contacted via Messenger.

This promo is not sponsored, endorsed, administered by, or associated with Facebook or Instagram.

[email protected]
253-770-6594

01/27/2026

💙 What a weekend! Thank you to everyone who made SEPTIC-CON 2026 such a success — exhibitors, speakers, sponsors, and attendees. Your energy, innovation, and passion keep our industry thriving. 👏

We're thrilled to see your photos from the event!

See you next year for SEPTIC-CON 2027! 🚀

01/23/2026

🎉 IT’S SHOWTIME! SEPTIC-CON 2026 starts today! The floor is open, sessions are packed, and Tacoma is buzzing with septic pros from across the region. Share your favorite moments with !

📍 Venue: Greater Tacoma Convention Center
🚗 Parking: 1500 Broadway, Tacoma, WA 98402

Let’s make it the best SEPTIC-CON yet! 💧

Address

2606 W Pioneer
Puyallup, WA
98371

Telephone

+12537706594

Website

http://www.wossa.org/

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