Septic soil in Person County, NC, by the numbers
Very limited
54.7% of Person County, NC's surveyed soil comes back "Very limited" in USDA's own SSURGO data, the county's dominant condition for a septic absorption field. That reading means a conventional system is a poor bet here - 54.7% of Person County lands in the strictest "very limited" bucket USDA uses. Person County, NC is 392.34 square miles with a population of 40,143.
What Person County's reading doesn't cover
Person County's rating is an average across the whole county, not a promise about any one lot inside it. A local percolation test, typically $750-$1,850 (around $1,300 typical), is the only way to know what one lot in Person County will actually do.
What a system would cost here
With 54.7% of Person 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 Person County, NC compares
Nationally, Person County, NC is the 2,827-most-constrained of 3,058 rated counties for septic soil. Within North Carolina alone it ranks 77 of 97.
Further reading
How this rating is built, and its real limits · Conventional vs. engineered septic systems