Beaver County, PA's soil, for a septic absorption field

Very limited

83.7% of Beaver County, PA's surveyed soil comes back "Very limited" in USDA's own SSURGO data, the county's dominant condition for a septic absorption field. This is the reading that pushes a project toward an engineered system rather than a conventional one, and it covers 83.7% of Beaver County's land. Beaver County, PA is 434.695 square miles with a population of 165,540.

What Beaver County's reading doesn't cover

Two lots a mile apart in Beaver County can carry different soil, even though they share one countywide rating. A local percolation test, typically $750-$1,850 (around $1,300 typical), is the only way to know what one lot in Beaver County will actually do.

What a system would cost here

With 83.7% of Beaver 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.

Beaver County's rank among Pennsylvania counties

Nationally, Beaver County, PA is the 1,808-most-constrained of 3,058 rated counties for septic soil. Within Pennsylvania alone it ranks 49 of 66.

Further reading

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