What Grayson County, VA's soil rates for a septic system

Very limited

94% of Grayson County, VA's surveyed soil comes back "Very limited" in USDA's own SSURGO data, the county's dominant condition for a septic absorption field. Expect the ground itself to work against a plain gravity system; USDA's strictest bucket alone covers 94% of the county. Grayson County, VA is 441.785 square miles with a population of 15,265.

What Grayson County's reading doesn't cover

USDA's survey covers the whole of Grayson County, VA at once, not any single address. A local percolation test, typically $750-$1,850 (around $1,300 typical), is the only way to know what one lot in Grayson County will actually do.

What a system would cost here

With 94% of Grayson 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 Grayson County, VA compares

Nationally, Grayson County, VA is the 790-most-constrained of 3,058 rated counties for septic soil. Within Virginia alone it ranks 5 of 110.

Before you act on this

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