Septic soil in Berks County, PA, by the numbers
Very limited
In Berks County, PA, 77.1% of the surveyed land carries a "Very limited" rating for a standard septic drain field. That reading means a conventional system is a poor bet here - 77.1% of Berks County lands in the strictest "very limited" bucket USDA uses. Berks County, PA is 856.404 square miles with a population of 439,117.
What Berks County's reading doesn't cover
Berks County's rating is an average across the whole county, not a promise about any one lot inside it. A local percolation test, typically $750-$1,850 (around $1,300 typical), is the only way to know what one lot in Berks County will actually do.
What a system would cost here
With 77.1% of Berks 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 Berks County, PA compares
Nationally, Berks County, PA is the 2,170-most-constrained of 3,058 rated counties for septic soil. Within Pennsylvania alone it ranks 56 of 66.
Related guides
How this rating is built, and its real limits · Conventional vs. engineered septic systems