Jefferson County, OR Septic Rating

Septic suitability in Jefferson County, OR

Very limited

Jefferson County, OR's SSURGO dominant class comes back "Very limited", covering 95.7% of the county. That reading means a conventional system is a poor bet here - it's already USDA's strictest "very limited" bucket, not a partial constraint. The county spans 1,782 square miles, home to 25,536 people.

What this number does and doesn't tell you

Two lots a mile apart in Jefferson County can carry different soil, even though they share one countywide rating. Budget $750-$1,850 for a real perc test on any specific parcel - that's the only figure a permit application accepts.

Jefferson County: conventional vs. engineered cost

95.7% of Jefferson County carrying a "Very limited" reading changes the realistic budget here. Conventional systems run $3,000-$8,000 where they pass; where they don't, engineered alternatives (mound or aerobic treatment, whichever the health department requires) run $10,000-$40,000 - budget toward the higher figure until a perc test says otherwise.

Where this sits nationally

Among the 3,058 rated counties on this site, Jefferson County, OR ranks 568 most-constrained nationally, and 15 of 36 within Oregon.

Before you act on this

How this rating is built, and its real limits · Conventional vs. engineered septic systems