Septic soil in Concordia Parish, LA, by the numbers

Very limited

In Concordia Parish, LA, 87.1% of the surveyed land carries a "Very limited" rating for a standard septic drain field. Expect the ground itself to work against a plain gravity system; USDA's strictest bucket alone covers 87.1% of the county. Concordia Parish, LA is 695.706 square miles with a population of 17,797.

What Concordia Parish's reading doesn't cover

This is a countywide, area-weighted figure across every soil survey map unit in Concordia Parish, LA - never a reading for one specific parcel. A local percolation test, typically $750-$1,850 (around $1,300 typical), is the only way to know what one lot in Concordia Parish will actually do.

What a system would cost here

With 87.1% of Concordia Parish rating "Very limited", a standard gravity system is not a safe assumption here. The engineered-system range, $10,000-$40,000 (mound or aerobic treatment), is the more realistic number to plan around, against $3,000-$8,000 for a conventional system on the rare lot that passes.

Concordia Parish's rank among Louisiana counties

Nationally, Concordia Parish, LA is the 1,534-most-constrained of 3,058 rated counties for septic soil. Within Louisiana alone it ranks 30 of 61.

Before you act on this

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