O2WA members are a resource to Realtors and Homeowners. 

Find a Professional is a searchable directory of O2WA members.

What you should know about Septic Systems
Properly functioning septic systems treat sewage to prevent ground and surface water pollution. A malfunctioning system is a health hazard to your family and your neighbors, and will harm natural resources. 

List of County and DEQ Offices
Additional information may be found at Oregon DEQ Onsite Wastewater Program and  your County Agency.

Oregon DEQ Rules & Regulations 
These rules establish requirements for the construction, alteration, repair, operation, and maintenance of onsite wastewater treatment systems. Their purpose is to restore and maintain the quality of public waters and to protect the public health and general welfare of the people of the State of Oregon.

Oregon Time of Transfer Inspections
Alternative Treatment Technologies (ATT) products. Time of sale inspections are not required for all onsite systems. However, DEQ and the Oregon Property Buyers Advisory developed by the Oregon Real Estate Agency recommends inspecting all onsite systems.

Technical Resources for Onsite Wastewater Program

Products and Product Approval 
Only those tank sizes and configurations that are listed on the Oregon DEQ List of Approved Tanks and Distribution Units are approved for installation currently.