Septic suitability in Lauderdale County, MS
Very limited
USDA puts Lauderdale County, MS at "Very limited" for septic absorption fields, the dominant reading across 90.3% of the county's soil. This is the reading that pushes a project toward an engineered system rather than a conventional one, and it covers 90.3% of Lauderdale County's land. The county spans 703.676 square miles, home to 70,588 people.
What this number does and doesn't tell you
USDA's survey covers the whole of Lauderdale County, MS at once, not any single address. Budget $750-$1,850 for a real perc test on any specific parcel - that's the only figure a permit application accepts.
Lauderdale County: conventional vs. engineered cost
90.3% of Lauderdale 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.
Lauderdale County's rank among Mississippi counties
Among the 3,058 rated counties on this site, Lauderdale County, MS ranks 1,229 most-constrained nationally, and 48 of 82 within Mississippi.
Related guides
How this rating is built, and its real limits · Conventional vs. engineered septic systems