Leflore County, MS: the USDA septic-suitability picture
Very limited
USDA puts Leflore County, MS at "Very limited" for septic absorption fields, the dominant reading across 92% of the county's soil. Expect the ground itself to work against a plain gravity system; USDA's strictest bucket alone covers 92% of the county. The county spans 594.074 square miles, home to 26,157 people.
What this number does and doesn't tell you
Leflore County's rating is an average across the whole county, not a promise about any one lot inside it. Budget $750-$1,850 for a real perc test on any specific parcel - that's the only figure a permit application accepts.
Leflore County: conventional vs. engineered cost
92% of Leflore County carrying a "Very limited" reading changes the realistic budget here. 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, Leflore County, MS ranks 1,044 most-constrained nationally, and 44 of 82 within Mississippi.
Related guides
How this rating is built, and its real limits · Conventional vs. engineered septic systems