Washington Onsite Sewage Association

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

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! 💧

01/22/2026

The SEPTIC-CON 2026 agenda is now live! 🗓️

Take a look at the full schedule to see session topics, speakers, and CEU opportunities before the event.

🔗 View the agenda at https://septiccon.org/agenda

📍 Tacoma, WA | January 23–24, 2026

12/22/2025

🚨 Calling all manufacturers, distributors, and service providers! Want your products in front of hundreds of wastewater pros from across the West? Booth space for SEPTIC-CON 2026 is almost full!

Secure your spot and join industry leaders shaping the future of on-site wastewater. 👉 https://wossa.org/page/EXHIBITORREGISTRATION

Tag a business that should be here! 👇

12/09/2025

🎓 Learn. Earn. Level Up.

At SEPTIC-CON 2026, you don’t just walk the floor — you walk away smarter. 💡

Join expert-led classes and workshops covering:
✔️ System design & installation
✔️ Regulations & compliance
✔️ Treatment tech & troubleshooting
✔️ Business growth strategies

Earn CEUs, gain hands-on skills, and leave with insights you can use right away.

🎟️ Reserve your spot: https://wossa.org/page/SEPTIC-CONRegistration

Photos from Washington Onsite Sewage Association's post

12/01/2025

🎬 Missed Last Year? Here’s What You Missed 👀

From packed exhibit halls to live equipment demos — SEPTIC-CON 2025 was a blast! 🙌

Catch the highlights and see why hundreds of wastewater pros call SEPTIC-CON the must-attend event of the year.
🎥 https://septiccon.org/septic-con-video

Get ready — SEPTIC-CON 2026 in Tacoma is going to be even bigger and better. Don’t miss out!

💻 Register now: https://wossa.org/page/SEPTIC-CONRegistration

11/25/2025

👋 Where the Septic Industry Meets Face-to-Face

There’s nothing like being surrounded by people who get what you do.
At SEPTIC-CON 2026, connect with installers, manufacturers, regulators, and innovators from across the Western U.S. 🌎

🍻 Networking receptions
💬 Industry meetups
🤝 Real conversations that spark opportunity

Bring your team, make connections, and be part of the community that keeps our industry strong.

Registration: 🔗 https://wossa.org/page/SEPTIC-CONRegistration

11/18/2025

🚜 Big Equipment. Bigger Ideas.

If it pumps, treats, digs, or tests — you’ll see it at SEPTIC-CON 2026!

This is your chance to check out the newest tools, systems, and tech driving the on-site wastewater industry forward.

💥 Live equipment demos
🧰 Hands-on product testing
💬 Meet top manufacturers & suppliers in person
Come see what’s new, what’s next, and what’ll make your workday easier. 👷‍♂️

👉 Exhibitor list & registration: https://wossa.org/page/SEPTIC-CONRegistration

11/13/2025

🚨 The Northwest’s Biggest Septic Industry Event is Back — SEPTIC-CON 2026! 🚨

Mark your calendars, septic pros — SEPTIC-CON 2026 is coming to Tacoma, Washington, January 23–24 💧

It’s the Western U.S.’s largest trade show and conference for the on-site wastewater industry — packed with equipment demos, expert training, and unbeatable networking.

✅ See the latest products & technology
✅ Learn from top instructors
✅ Connect with hundreds of pros who “get it”

📍 Greater Tacoma Convention Center

💻 Learn more & register early: https://wossa.org/page/SEPTIC-CONRegistration
Follow our event page

06/24/2025

Reminders Going Out…
Trade/Technical/Vocational/Occupation Training Program tuition assistance opportunity for WOSSA’s Members (Adults) and Member Children, Grandchildren, or Dependents. Try getting your application submitted before your reminder arrives!
https://wossa.org/page/BigJimScholarship

06/17/2025

WOSSA MEMBERS: Don't miss out on this fantastic scholarship opportunity!! Find more information through the link below.

BIG JIM TRADES SCHOLARSHIP (Honoring Big Jim Wolfe)

Applications are due by July 15th, 2025

https://wossa.org/page/BigJimScholarship

09/18/2024

Septic Smart Week EPA - https://www.epa.gov/septic/septicsmart-week

Everything that goes down your drain can affect your septic system. Avoid pouring fats, oils, and grease down the sink, as they can clog pipes and drain fields. Use your garbage disposal sparingly and avoid flushing non-degradable items like wipes, menstrual products, and dental floss.

Think At The Sink! NOTE: If you need captions, please click the CC button on the player to turn them on.This U.S. Environmental Protection Agency video is part of a series of S...

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Location

Puyallup

Telephone

+12537706594

Website

http://www.wossa.org/

Address

2606 W Pioneer
Puyallup, WA
98371