Mono County's SSURGO septic rating

Very limited

Mono County, CA's SSURGO dominant class comes back "Very limited", covering 84% of the county. That reading means a conventional system is a poor bet here - 84% of Mono County lands in the strictest "very limited" bucket USDA uses. For scale: 3,048.904 square miles and 12,991 people call Mono County home.

Before you rely on this for one lot

This is a countywide, area-weighted figure across every soil survey map unit in Mono County, CA - 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 Mono County, CA

Mono 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 Mono County, CA compares

Among the 3,058 rated counties on this site, Mono County, CA ranks 1,781 most-constrained nationally, and 46 of 57 within California.

Further reading

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