On-site Wastewater Program

Columbia County regulates the installation, repair, and maintenance of septic systems for homes and businesses not served by community sewer systems.

The Onsite Wastewater program is managed by the county's Public Health Department. 

Septic and onsite wastewater treatment systems must be designed, installed, and maintained to protect:

  • the groundwater aquifer and surface waters from pathogen and nitrogen contamination
  • public health by properly treating and disposing of disease-causing human waste.

Our services include:

More information:

Contact: onsite@columbiacountyor.gov

Public Health Quick Links
General Information
Phone Numbers
503-397-7247 24-hour Reporting 503-397-7247
Fax: 888-204-8568
Emergencies: Dial 911
230 Strand St.
Columbia County Courthouse Annex
St. Helens,

Monday - Friday
8:30 a.m. to 4:30


Columbia County Public Health is committed to improving the quality of life and protecting the health and well-being of all residents by addressing social, economic, and environmental conditions. Our goal is to ensure that all people in Columbia County have the opportunity for a healthy life.