Clay County, KY Septic Rating
Clay County, KY: the USDA septic-suitability picture
Very limited
USDA puts Clay County, KY at "Very limited" for septic absorption fields, the dominant reading across 97.2% of the county's soil. That reading means a conventional system is a poor bet here - it's already USDA's strictest "very limited" bucket, not a partial constraint. The county spans 469 square miles, home to 19,592 people.
What this number does and doesn't tell you
Two lots a mile apart in Clay County can carry different soil, even though they share one countywide rating. Budget $750-$1,850 for a real perc test on any specific parcel - that's the only figure a permit application accepts.
Clay County: conventional vs. engineered cost
97.2% of Clay 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 Clay County, KY compares
Among the 3,058 rated counties on this site, Clay County, KY ranks 358 most-constrained nationally, and 13 of 119 within Kentucky.
Further reading
How this rating is built, and its real limits · Conventional vs. engineered septic systems