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

Very limited

Soil across 93.3% of Yancey County, NC rates "Very limited" in USDA's septic-absorption-field interpretation. That reading means a conventional system is a poor bet here - 93.3% of Yancey County lands in the strictest "very limited" bucket USDA uses. Yancey County covers 312.592 square miles and counts 18,993 residents.

This is a county figure, not a parcel figure

Two lots a mile apart in Yancey County can carry different soil, even though they share one countywide rating. A site-specific perc test, usually $750-$1,850, is what a health department will actually require before permitting a lot in Yancey County.

System cost, conventional vs. engineered

Given Yancey 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, Yancey County, NC is the 888-most-constrained of 3,058 rated counties for septic soil. Within North Carolina alone it ranks 11 of 97.

Related guides

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