Vermilion Parish's SSURGO septic rating

Very limited

USDA puts Vermilion Parish, LA at "Very limited" for septic absorption fields, the dominant reading across 81.1% of the county's soil. This is the reading that pushes a project toward an engineered system rather than a conventional one, and it covers 81.1% of Vermilion Parish's land. The county spans 1,172.061 square miles, home to 57,641 people.

What this number does and doesn't tell you

Vermilion 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.

Vermilion Parish: conventional vs. engineered cost

81.1% of Vermilion 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.

How Vermilion Parish, LA compares

Among the 3,058 rated counties on this site, Vermilion Parish, LA ranks 1,985 most-constrained nationally, and 46 of 61 within Louisiana.

Further reading

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