Septic suitability in Latah County, ID

Very limited

USDA puts Latah County, ID at "Very limited" for septic absorption fields, the dominant reading across 97.5% of the county's soil. Expect the ground itself to work against a plain gravity system; USDA's strictest bucket alone covers 97.5% of the county. For scale: 1,075.867 square miles and 42,180 people call Latah County home.

Before you rely on this for one lot

USDA's survey covers the whole of Latah County, ID at once, not any single address. 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 Latah County, ID

Latah 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 Latah County, ID compares

Among the 3,058 rated counties on this site, Latah County, ID ranks 316 most-constrained nationally, and 3 of 44 within Idaho.

Related guides

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