Utah County's SSURGO septic rating
Very limited
Utah County, UT: USDA's soil survey calls 66.6% of the county "Very limited" for a septic leach field. 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 2,004.46 square miles, home to 747,234 people.
What this number does and doesn't tell you
Nothing about Utah County, UT's SSURGO figure applies to a specific address - it's a county-wide average. Budget $750-$1,850 for a real perc test on any specific parcel - that's the only figure a permit application accepts.
Utah County: conventional vs. engineered cost
66.6% of Utah 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.
How Utah County, UT compares
Among the 3,058 rated counties on this site, Utah County, UT ranks 2,569 most-constrained nationally, and 21 of 28 within Utah.
Related guides
How this rating is built, and its real limits · Conventional vs. engineered septic systems