Raleigh County, WV: the USDA septic-suitability picture
Very limited
Raleigh County, WV's SSURGO dominant class comes back "Very limited", covering 95.6% of the county. That reading means a conventional system is a poor bet here - 95.6% of Raleigh County lands in the strictest "very limited" bucket USDA uses. The county spans 604.97 square miles, home to 72,379 people.
What this number does and doesn't tell you
This is a countywide, area-weighted figure across every soil survey map unit in Raleigh County, WV - never a reading for one specific parcel. Budget $750-$1,850 for a real perc test on any specific parcel - that's the only figure a permit application accepts.
Raleigh County: conventional vs. engineered cost
95.6% of Raleigh 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, Raleigh County, WV ranks 577 most-constrained nationally, and 24 of 55 within West Virginia.
Related guides
How this rating is built, and its real limits · Conventional vs. engineered septic systems