What Forest County, PA's soil rates for a septic system
Very limited
In Forest County, PA, 98.3% of the surveyed land carries a "Very limited" rating for a standard septic drain field. Practically, that rules out a simple gravity system for most of the county - 98.3% of it sits in USDA's most-constrained bucket. Forest County, PA is 427.259 square miles with a population of 6,601.
What Forest County's reading doesn't cover
Nothing about Forest County, PA's SSURGO figure applies to a specific address - it's a county-wide average. A local percolation test, typically $750-$1,850 (around $1,300 typical), is the only way to know what one lot in Forest County will actually do.
What a system would cost here
With 98.3% of Forest County rating "Very limited", a standard gravity system is not a safe assumption here. The engineered-system range, $10,000-$40,000 (mound or aerobic treatment), is the more realistic number to plan around, against $3,000-$8,000 for a conventional system on the rare lot that passes.
Forest County's rank among Pennsylvania counties
Nationally, Forest County, PA is the 212-most-constrained of 3,058 rated counties for septic soil. Within Pennsylvania alone it ranks 6 of 66.
Related guides
How this rating is built, and its real limits · Conventional vs. engineered septic systems