Septic suitability in Mingo County, WV
Very limited
USDA puts Mingo County, WV at "Very limited" for septic absorption fields, the dominant reading across 95.3% of the county's soil. Expect the ground itself to work against a plain gravity system; USDA's strictest bucket alone covers 95.3% of the county. The county spans 423.121 square miles, home to 21,712 people.
What this number does and doesn't tell you
USDA's survey covers the whole of Mingo County, WV at once, not any single address. Budget $750-$1,850 for a real perc test on any specific parcel - that's the only figure a permit application accepts.
Mingo County: conventional vs. engineered cost
95.3% of Mingo 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.
Where this sits nationally
Among the 3,058 rated counties on this site, Mingo County, WV ranks 637 most-constrained nationally, and 28 of 55 within West Virginia.
Related guides
How this rating is built, and its real limits · Conventional vs. engineered septic systems