Septic soil in Salem city, VA, by the numbers

Very limited

Soil across 76.2% of Salem city, VA rates "Very limited" in USDA's septic-absorption-field interpretation. Practically, that rules out a simple gravity system for most of the county - 76.2% of it sits in USDA's most-constrained bucket. Salem city, VA is 14.517 square miles with a population of 25,908.

What Salem city's reading doesn't cover

Salem city'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 Salem city will actually do.

What a system would cost here

With 76.2% of Salem city 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.

Where this sits nationally

Nationally, Salem city, VA is the 2,223-most-constrained of 3,058 rated counties for septic soil. Within Virginia alone it ranks 55 of 110.

Before you act on this

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