Union County, MS: the USDA septic-suitability picture

Very limited

USDA puts Union County, MS at "Very limited" for septic absorption fields, the dominant reading across 99.3% of the county's soil. Expect the ground itself to work against a plain gravity system; USDA's strictest bucket alone covers 99.3% of the county. The county spans 415.607 square miles, home to 28,363 people.

What this number does and doesn't tell you

USDA's survey covers the whole of Union 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.

Union County: conventional vs. engineered cost

99.3% of Union 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.

How Union County, MS compares

Among the 3,058 rated counties on this site, Union County, MS ranks 51 most-constrained nationally, and 2 of 82 within Mississippi.

Before you act on this

How this rating is built, and its real limits · Conventional vs. engineered septic systems