Sevier County's SSURGO septic rating
Very limited
USDA puts Sevier County, AR at "Very limited" for septic absorption fields, the dominant reading across 87% of the county's soil. That reading means a conventional system is a poor bet here - 87% of Sevier County lands in the strictest "very limited" bucket USDA uses. The county spans 563.569 square miles, home to 15,735 people.
What this number does and doesn't tell you
Nothing about Sevier 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.
Sevier County: conventional vs. engineered cost
87% of Sevier 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, Sevier County, AR ranks 1,543 most-constrained nationally, and 58 of 75 within Arkansas.
Further reading
How this rating is built, and its real limits · Conventional vs. engineered septic systems