What Covington County, AL's soil rates for a septic system
Very limited
Soil across 49.7% of Covington County, AL rates "Very limited" in USDA's septic-absorption-field interpretation. A standard gravity system routinely fails on ground like this; the same share of the county falls in USDA's worst absorption-field bucket outright. Covington County, AL is 1,030.573 square miles with a population of 37,748.
What Covington County's reading doesn't cover
Covington 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 Covington County will actually do.
What a system would cost here
With 49.7% of Covington 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 Covington County, AL compares
Nationally, Covington County, AL is the 2,888-most-constrained of 3,058 rated counties for septic soil. Within Alabama alone it ranks 64 of 67.
Related guides
How this rating is built, and its real limits · Conventional vs. engineered septic systems