Septic suitability in Imperial County, CA

Very limited

Imperial County, CA's SSURGO dominant class comes back "Very limited", covering 97.6% of the county. 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. The county spans 4,175.453 square miles, home to 181,724 people.

What this number does and doesn't tell you

Imperial County's rating is an average across the whole county, not a promise about any one lot inside it. Budget $750-$1,850 for a real perc test on any specific parcel - that's the only figure a permit application accepts.

Imperial County: conventional vs. engineered cost

97.6% of Imperial County carrying a "Very limited" reading changes the realistic budget here. 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.

Imperial County's rank among California counties

Among the 3,058 rated counties on this site, Imperial County, CA ranks 299 most-constrained nationally, and 2 of 57 within California.

Before you act on this

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