Septic Tank Companies in Oregon
142 septic service companies across 71 cities — approximately 25% of Oregon homes use septic systems
Oregon's septic systems are regulated by the Oregon Department of Environmental Quality (DEQ) under the Onsite Wastewater Treatment Systems rules (OAR 340-071 and 340-073), with county environmental health departments serving as DEQ's agents for local permitting and inspections. Oregon's dramatic geographic diversity — from the wet coastal forests that receive over 100 inches of rain annually to the arid high desert east of the Cascades receiving less than 10 inches — creates radically different challenges for septic system design. The Willamette Valley's clay-rich soils and high water table present persistent drainage issues, while eastern Oregon's volcanic soils and extreme temperature swings create their own challenges.