De Soto Parish's SSURGO septic rating

Very limited

USDA puts De Soto Parish, LA at "Very limited" for septic absorption fields, the dominant reading across 89.7% of the county's soil. Practically, that rules out a simple gravity system for most of the county - 89.7% of it sits in USDA's most-constrained bucket. The county spans 876.45 square miles, home to 27,274 people.

What this number does and doesn't tell you

USDA's survey covers the whole of De Soto Parish, LA 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.

De Soto Parish: conventional vs. engineered cost

89.7% of De Soto Parish 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, De Soto Parish, LA ranks 1,304 most-constrained nationally, and 22 of 61 within Louisiana.

Before you act on this

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