Septic suitability in Davidson County, NC
Very limited
USDA puts Davidson County, NC at "Very limited" for septic absorption fields, the dominant reading across 60.4% of the county's soil. This is the reading that pushes a project toward an engineered system rather than a conventional one, and it covers 60.4% of Davidson County's land. The county spans 552.989 square miles, home to 177,809 people.
What this number does and doesn't tell you
Nothing about Davidson County, NC's SSURGO figure applies to a specific address - it's a county-wide average. Budget $750-$1,850 for a real perc test on any specific parcel - that's the only figure a permit application accepts.
Davidson County: conventional vs. engineered cost
60.4% of Davidson County carrying a "Very limited" reading changes the realistic budget here. Conventional systems run $3,000-$8,000 where they pass; where they don't, engineered alternatives (mound or aerobic treatment, whichever the health department requires) run $10,000-$40,000 - budget toward the higher figure until a perc test says otherwise.
How Davidson County, NC compares
Among the 3,058 rated counties on this site, Davidson County, NC ranks 2,719 most-constrained nationally, and 71 of 97 within North Carolina.
Further reading
How this rating is built, and its real limits · Conventional vs. engineered septic systems