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

WOSSA Safety Training Videos




In a deliberate effort to raise awareness and reduce workplace injuries related to Pathogen Exposure, Confined Space Entry and the OSHA Construction Focus Four; Falls, Caught-in,-by, Struck by and Electrocution, WOSSA has developed new training resources that focus on workers in the On-Site industry. This training delivers both knowledge and practical skills to address the numerous hazards that are unique to our industry.

These videos were developed by WOSSA as an integral part of these safety training classes.

...more WOSSA events


The 2017 WOSSA Scholarship Program is Now Open for Applications!

Don't miss the April 30th deadline for application submittal. WOSSA is distributing $20,000 in scholarship awards, including a first place award of $5,000!

              Click Here For 
More Information 

...click here for more 

The Spring 2017 Schedule 

        2016-2017 Schedule
                 Click Here


     Upcoming Training Events

Confined Space Entry   04.26.17
Puyallup, WA
O&M / Installation Certification For Proprietary Devices

  05.3 & 4.17
Puyallup, WA
Electrical Control Panels
Puyallup, WA
OSHA Focus Four Safety Training for OSS
Bremerton, WA
Please Call to Register

...full class schedule



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