What Barbour County, AL's soil rates for a septic system
Very limited
Soil across 80.7% of Barbour County, AL rates "Very limited" in USDA's septic-absorption-field interpretation. Practically, that rules out a simple gravity system for most of the county - 80.7% of it sits in USDA's most-constrained bucket. Barbour County, AL is 885.008 square miles with a population of 24,358.
What Barbour County's reading doesn't cover
This is a countywide, area-weighted figure across every soil survey map unit in Barbour County, AL - never a reading for one specific parcel. A local percolation test, typically $750-$1,850 (around $1,300 typical), is the only way to know what one lot in Barbour County will actually do.
What a system would cost here
With 80.7% of Barbour 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.
Barbour County's rank among Alabama counties
Nationally, Barbour County, AL is the 2,003-most-constrained of 3,058 rated counties for septic soil. Within Alabama alone it ranks 33 of 67.
Related guides
How this rating is built, and its real limits · Conventional vs. engineered septic systems