Washington On-Site Sewage Association

Washington On-Site Sewage Association - Wastewater Systems


"Voice of the Industry" for Members, Consumers, Our Communities & the Environment

Washington State has 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. Helping to replenish nature’s support system with a long term sustainable approach to wastewater disposal and treatment.

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Calendar of Events
Training Classes

Congratulations to the Newly Elected 2015 WOSSA Board Members!!!

President: Jerry Stonebridge
Vice President: Mike Moren
Past President: Bill Creveling
Treasurer: JR Inman
Secretary: Keith Pelzel
Pumper Rep: Julie Toaves
Regulatoy Rep: Dave Tipton
Eastern Region Rep: Adam Johnson
Supply / MFR. Rep: Dave Lowe

Thank you for your support and voting for WOSSA's 2015 "Voices of the Industry."  

Washington State DOH Issues 2012 RS&G's

The Washington State Department of Health has issued updated RS&G's which are available below in PDF form. WOSSA has consolidated all 15 of the new RS&G sections into one document. Bookmarks have been added for each section of this 500 page update. We hope that this will help to make your use of the RS&G's a little more efficient.

           2012 WA DOH RS&G

...more WOSSA events

2015 19th Annual WOSSA Conference


We are Excited to Announce that the 2015 WOSSA Conference Will be Held in Tacoma, WA! Register now on-line or call 253.770.6594.
            January 23 & 24

Click Here for More Info!!!

...more WOSSA news 

The 2014 Fall - 2015 Spring Training Schedule is Here!

         2014 - 2015 Schedule
                 Click Here 

     Upcoming Training Events

Pathogen Exposures in OSS    02.12.15
Puyallup, WA
D-109 Design Sitting    02.19.15
Mt. Vernon, WA
This Class is Being Rescheduled
Pathogen Exposures in OSS    02.26.15
Moses Lake, WA
Monitoring, Maintenance and Troubleshooting    03.05.15
Puyallup, WA
...full class schedule



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