Septic soil in Calhoun County, SC, by the numbers

Very limited

In Calhoun County, SC, 66.2% of the surveyed land carries a "Very limited" rating for a standard septic drain field. Expect the ground itself to work against a plain gravity system; USDA's strictest bucket alone covers 66.2% of the county. Calhoun County, SC is 381.146 square miles with a population of 14,249.

What Calhoun County's reading doesn't cover

Calhoun 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 Calhoun County will actually do.

What a system would cost here

With 66.2% of Calhoun 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.

Calhoun County's rank among South Carolina counties

Nationally, Calhoun County, SC is the 2,581-most-constrained of 3,058 rated counties for septic soil. Within South Carolina alone it ranks 28 of 46.

Before you act on this

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