New Kent County, VA's soil, for a septic absorption field
Very limited
86.1% of New Kent 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. A standard gravity system routinely fails on ground like this; the same share of the county falls in USDA's worst absorption-field bucket outright. New Kent County, VA is 210.031 square miles with a population of 27,218.
What New Kent County's reading doesn't cover
New Kent 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 New Kent County will actually do.
What a system would cost here
With 86.1% of New Kent 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.
New Kent County's rank among Virginia counties
Nationally, New Kent County, VA is the 1,609-most-constrained of 3,058 rated counties for septic soil. Within Virginia alone it ranks 28 of 110.
Further reading
How this rating is built, and its real limits · Conventional vs. engineered septic systems