Sevier County, UT: the USDA septic-suitability picture

Very limited

USDA puts Sevier County, UT at "Very limited" for septic absorption fields, the dominant reading across 77.9% 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 77.9% of Sevier County's land. For scale: 1,910.476 square miles and 22,520 people call Sevier County home.

Before you rely on this for one lot

Two lots a mile apart in Sevier County can carry different soil, even though they share one countywide rating. 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 Sevier County, UT

Sevier County'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.

How Sevier County, UT compares

Among the 3,058 rated counties on this site, Sevier County, UT ranks 2,143 most-constrained nationally, and 12 of 28 within Utah.

Further reading

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