Benton County's SSURGO septic rating
Very limited
Benton County, AR's SSURGO dominant class comes back "Very limited", covering 89.3% of the county. A standard gravity system routinely fails on ground like this; the same share of the county falls in USDA's worst absorption-field bucket outright. The county spans 847.74 square miles, home to 321,566 people.
What this number does and doesn't tell you
Nothing about Benton County, AR's SSURGO figure applies to a specific address - it's a county-wide average. Budget $750-$1,850 for a real perc test on any specific parcel - that's the only figure a permit application accepts.
Benton County: conventional vs. engineered cost
89.3% of Benton 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.
How Benton County, AR compares
Among the 3,058 rated counties on this site, Benton County, AR ranks 1,340 most-constrained nationally, and 44 of 75 within Arkansas.
Related guides
How this rating is built, and its real limits · Conventional vs. engineered septic systems