What Vance County, NC's soil rates for a septic system

Somewhat limited

60.5% of Vance County, NC's surveyed soil comes back "Somewhat limited" in USDA's own SSURGO data, the county's dominant condition for a septic absorption field. That's a middle reading: not the outright failure "very limited" soil produces, but not a clean pass either. Design changes often bridge the gap. Vance County covers 252.401 square miles and counts 42,337 residents.

This is a county figure, not a parcel figure

USDA's survey covers the whole of Vance County, NC at once, not any single address. A site-specific perc test, usually $750-$1,850, is what a health department will actually require before permitting a lot in Vance County.

System cost, conventional vs. engineered

Given Vance County's rating, plan for the engineered-system range rather than the conventional one. 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, Vance County, NC is the 3,003-most-constrained of 3,058 rated counties for septic soil. Within North Carolina alone it ranks 95 of 97.

Further reading

How this rating is built, and its real limits · How a percolation test actually works