WOSSA Member

Education Scholarship

Submit by April 30, 2019

​​Application Information

Whether you’re an employer or someone looking to get hired on, having the skills, attitude and knowledge...

Ideal for New Hires or Employees Stepping into Leadership


April 10th-12th

It is always a challenge to find a quality service provider within any trade...

April 15th-18th & 22nd-25th 2019

CAD Design - Class Postponed


WOSSA Pumper / O&M Technician Academy



Top News

April 4th

I-101/102 Basics of Installation

Puyallup - 8:30 AM

WOSSA Training Center 

In a deliberate effort to raise awareness and reduce workplace injuries related to

Pathogen Exposure, Confined Space Entry, OSHA Construction Focus Four: Falls, Caught-in or between, 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.

Upcoming Training Classes

call us toll free:


​Washington On-Site Sewage Association

"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.

Voice of the INDUSTRY

WOSSA Membership

For over 20 years WOSSA's goal has been to promote professional excellence through education, advocacy...

Calendar of Events

Washington On-Site Sewage Association MembershipRecently, Jerry Stonebridge, John Thomas...