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

Very limited

Soil across 99.3% of Clay County, AR rates "Very limited" in USDA's septic-absorption-field interpretation. Practically, that rules out a simple gravity system for most of the county - 99.3% of it sits in USDA's most-constrained bucket. Clay County, AR is 639.224 square miles with a population of 14,112.

What Clay County's reading doesn't cover

This is a countywide, area-weighted figure across every soil survey map unit in Clay County, AR - never a reading for one specific parcel. A local percolation test, typically $750-$1,850 (around $1,300 typical), is the only way to know what one lot in Clay County will actually do.

What a system would cost here

With 99.3% of Clay 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.

Where this sits nationally

Nationally, Clay County, AR is the 53-most-constrained of 3,058 rated counties for septic soil. Within Arkansas alone it ranks 1 of 75.

Before you act on this

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