Onsite Sewage Land Use
The OSS program at the Walla Walla County Department of Community Health exists to ensure that on-site sewage disposal systems are properly designed and installed to prevent public exposure to sewage and to protect ground and surface water from contamination.
We have regulatory oversight for all domestic on-site sewage systems that are under 3500 gallons in Walla Walla County. We perform a wide variety of activities to carry out this oversight that include:
- Site and Soil Evaluations
- Application review for new, repaired or expanded On-Site Sewage Systems
- Permit Issuance
- Final construction inspections
- Homeowner education and notification regarding proper Operation and Maintenance of their OSS
- Enforcement of OSS Codes, including the Walla Walla County Ordinance Chapter 8.16 and Washington Administrative Code, WAC 246-272A
- Complaint investigations
- Subdivision, Boundary Line Adjustment and Conditional Use review
- Issue permits for septic system installers and septic system pumpers