Inyo County's SSURGO septic rating

Very limited

USDA puts Inyo County, CA at "Very limited" for septic absorption fields, the dominant reading across 84.8% of the county's soil. A standard gravity system routinely fails on ground like this; the same share of the county falls in USDA's worst absorption-field bucket outright. For scale: 10,197.261 square miles and 18,485 people call Inyo County home.

Before you rely on this for one lot

Inyo County's rating is an average across the whole county, not a promise about any one lot inside it. 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 Inyo County, CA

Inyo 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.

Inyo County's rank among California counties

Among the 3,058 rated counties on this site, Inyo County, CA ranks 1,711 most-constrained nationally, and 43 of 57 within California.

Before you act on this

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