What Johnson County, AR's soil rates for a septic system

Very limited

In Johnson County, AR, 78.9% of the surveyed land carries a "Very limited" rating for a standard septic drain field. That reading means a conventional system is a poor bet here - 78.9% of Johnson County lands in the strictest "very limited" bucket USDA uses. Johnson County, AR is 660.99 square miles with a population of 26,172.

What Johnson County's reading doesn't cover

Two lots a mile apart in Johnson County can carry different soil, even though they share one countywide rating. A local percolation test, typically $750-$1,850 (around $1,300 typical), is the only way to know what one lot in Johnson County will actually do.

What a system would cost here

With 78.9% of Johnson County rating "Very limited", a standard gravity system is not a safe assumption here. The engineered-system range, $10,000-$40,000 (mound or aerobic treatment), is the more realistic number to plan around, against $3,000-$8,000 for a conventional system on the rare lot that passes.

How Johnson County, AR compares

Nationally, Johnson County, AR is the 2,095-most-constrained of 3,058 rated counties for septic soil. Within Arkansas alone it ranks 73 of 75.

Before you act on this

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