Greene County, PA: the USDA septic-suitability picture
Very limited
Greene County, PA: USDA's soil survey calls 97.8% of the county "Very limited" for a septic leach field. Expect the ground itself to work against a plain gravity system; USDA's strictest bucket alone covers 97.8% of the county. The county spans 575.932 square miles, home to 33,960 people.
What this number does and doesn't tell you
Nothing about Greene County, PA'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.
Greene County: conventional vs. engineered cost
97.8% of Greene 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, Greene County, PA ranks 278 most-constrained nationally, and 12 of 66 within Pennsylvania.
Related guides
How this rating is built, and its real limits · Conventional vs. engineered septic systems