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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)  

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