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 - 95.7% of Jefferson County lands in the strictest "very limited" bucket USDA uses. The county spans 1,781.696 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