Benton County's SSURGO septic rating

Very limited

Benton County, OR's SSURGO dominant class comes back "Very limited", covering 92.3% of the county. This is the reading that pushes a project toward an engineered system rather than a conventional one, and it covers 92.3% of Benton County's land. For scale: 675.208 square miles and 98,899 people call Benton County home.

Before you rely on this for one lot

Two lots a mile apart in Benton County can carry different soil, even though they share one countywide rating. The real answer for one lot is still a site-specific perc test, running about $750-$1,850 (typically near $1,300).

Budgeting for a system in Benton County, OR

Benton County's soil reading pushes the likely outcome toward an engineered system rather than a conventional one. 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.

Benton County's rank among Oregon counties

Among the 3,058 rated counties on this site, Benton County, OR ranks 998 most-constrained nationally, and 23 of 36 within Oregon.

Further reading

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