What Orange County, CA's soil rates for a septic system

Very limited

In Orange County, CA, 88.3% of the surveyed land carries a "Very limited" rating for a standard septic drain field. Expect the ground itself to work against a plain gravity system; USDA's strictest bucket alone covers 88.3% of the county. Orange County, CA is 793.249 square miles with a population of 3,170,435.

What Orange County's reading doesn't cover

Nothing about Orange County, CA's SSURGO figure applies to a specific address - it's a county-wide average. A local percolation test, typically $750-$1,850 (around $1,300 typical), is the only way to know what one lot in Orange County will actually do.

What a system would cost here

With 88.3% of Orange County rating "Very limited", a standard gravity system is not a safe assumption here. The engineered-system range, $10,000-$40,000 (mound or aerobic treatment), is the more realistic number to plan around, against $3,000-$8,000 for a conventional system on the rare lot that passes.

How Orange County, CA compares

Nationally, Orange County, CA is the 1,432-most-constrained of 3,058 rated counties for septic soil. Within California alone it ranks 39 of 57.

Before you act on this

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