Ascension Parish, LA: the USDA septic-suitability picture

Very limited

Ascension Parish, LA's SSURGO dominant class comes back "Very limited", covering 93.1% of the county. This is the reading that pushes a project toward an engineered system rather than a conventional one, and it covers 93.1% of Ascension Parish's land. For scale: 290.003 square miles and 133,534 people call Ascension Parish home.

Before you rely on this for one lot

This is a countywide, area-weighted figure across every soil survey map unit in Ascension Parish, LA - never a reading for one specific parcel. The real answer for one lot is still a site-specific perc test, running about $750-$1,850 (typically near $1,300).

Budgeting for a system in Ascension Parish, LA

Ascension Parish's soil reading pushes the likely outcome toward an engineered system rather than a conventional one. 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.

Ascension Parish's rank among Louisiana counties

Among the 3,058 rated counties on this site, Ascension Parish, LA ranks 908 most-constrained nationally, and 10 of 61 within Louisiana.

Before you act on this

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