Livingston Parish, LA: the USDA septic-suitability picture

Very limited

Livingston Parish, LA's SSURGO dominant class comes back "Very limited", covering 90.2% of the county. Expect the ground itself to work against a plain gravity system; USDA's strictest bucket alone covers 90.2% of the county. The county spans 648.14 square miles, home to 152,886 people.

What this number does and doesn't tell you

Livingston Parish'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.

Livingston Parish: conventional vs. engineered cost

90.2% of Livingston 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, Livingston Parish, LA ranks 1,242 most-constrained nationally, and 18 of 61 within Louisiana.

Further reading

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