Placer County's SSURGO septic rating

Very limited

Placer County, CA's SSURGO dominant class comes back "Very limited", covering 95.4% of the county. Practically, that rules out a simple gravity system for most of the county - 95.4% of it sits in USDA's most-constrained bucket. For scale: 1,407.401 square miles and 433,822 people call Placer County home.

Before you rely on this for one lot

Two lots a mile apart in Placer 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 Placer County, CA

Placer 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.

Placer County's rank among California counties

Among the 3,058 rated counties on this site, Placer County, CA ranks 605 most-constrained nationally, and 12 of 57 within California.

Further reading

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