Jeff Davis County's SSURGO septic rating
Very limited
Jeff Davis County, TX: USDA's soil survey calls 79% of the county "Very limited" for a septic leach field. That reading means a conventional system is a poor bet here - 79% of Jeff Davis County lands in the strictest "very limited" bucket USDA uses. For scale: 2,264.556 square miles and 1,778 people call Jeff Davis County home.
Before you rely on this for one lot
Two lots a mile apart in Jeff Davis County can carry different soil, even though they share one countywide rating. The real answer for one lot is still a site-specific perc test, running about $750-$1,850 (typically near $1,300).
Budgeting for a system in Jeff Davis County, TX
Jeff Davis County's soil reading pushes the likely outcome toward an engineered system rather than a conventional one. Conventional systems run $3,000-$8,000 where they pass; where they don't, engineered alternatives (mound or aerobic treatment, whichever the health department requires) run $10,000-$40,000 - budget toward the higher figure until a perc test says otherwise.
Where this sits nationally
Among the 3,058 rated counties on this site, Jeff Davis County, TX ranks 2,093 most-constrained nationally, and 154 of 253 within Texas.
Related guides
How this rating is built, and its real limits · Conventional vs. engineered septic systems