What Delaware County, PA's soil rates for a septic system

Very limited

Soil across 71.8% of Delaware County, PA rates "Very limited" in USDA's septic-absorption-field interpretation. Expect the ground itself to work against a plain gravity system; USDA's strictest bucket alone covers 71.8% of the county. Delaware County, PA is 183.808 square miles with a population of 584,882.

What Delaware County's reading doesn't cover

Nothing about Delaware 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 Delaware County will actually do.

What a system would cost here

With 71.8% of Delaware 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.

How Delaware County, PA compares

Nationally, Delaware County, PA is the 2,407-most-constrained of 3,058 rated counties for septic soil. Within Pennsylvania alone it ranks 61 of 66.

Before you act on this

How this rating is built, and its real limits · Conventional vs. engineered septic systems