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Septic Systems

This page contains information for contractors.

Meetings and workshops for certified O&M specialists, pumpers, and installers

Cowlitz County hosted Septic Seminar (PDF)
November 19, 2014 8 a.m. - 5 p.m.
To RSVP, please contact Megan Erickson with the EHU
Phone: 360-414-5599

Certifications expire on March 1 of each year and must be renewed annually. Please contact Sandy Angus at if you have questions.

Local on-site septic system regulations
The Clark County Board of Health adopted Ordinance 24.17, On-Site Sewage (Septic) System Rules and Regulations of Clark County Public Health, in October 2007 during a public hearing.

Quality Control & Assurance Designer/Installer OSS Checklist

Technical Advisory Committee
The On-site Septic Systems Technical Advisory Committee meets to discuss on-site septic policy, current science and technology, and trends. Meetings are flexibly scheduled to accommodate professional schedules. However, they are generally held every other month on a Wednesday at 3 p.m. at the Environmental Public Health offices in the Center for Community Health located at 1601 E. Fourth Plain Blvd., Vancouver. 

Minutes of past meetings (all PDFs)  

- March 20, 2013

- November 28, 2012

- August 15, 2012

- April 18, 2012

- January 11, 2012

More information

National Environmental Health Association (NEHA).

Alternative system links:


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Spanish contact information

(360) 397-8000 ext. 7205

Russian contact information

(360) 397-8000 ext. 7214