Nelson County, KY Septic Rating
Nelson County's SSURGO septic rating
Very limited
Nelson County, KY's SSURGO dominant class comes back "Very limited", covering 87.9% of the county. Expect the ground itself to work against a plain gravity system; that share is already USDA's strictest bucket, not a lesser constraint layered on top. The county spans 419 square miles, home to 48,706 people.
What this number does and doesn't tell you
Nothing about Nelson County, KY'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.
Nelson County: conventional vs. engineered cost
87.9% of Nelson 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, Nelson County, KY ranks 1,473 most-constrained nationally, and 70 of 119 within Kentucky.
Before you act on this
How this rating is built, and its real limits · Conventional vs. engineered septic systems