Dolores County, CO's soil, for a septic absorption field

Very limited

Soil across 85.3% of Dolores County, CO rates "Very limited" in USDA's septic-absorption-field interpretation. 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. Dolores County, CO is 1,067.17 square miles with a population of 2,467.

What Dolores County's reading doesn't cover

Dolores County's rating is an average across the whole county, not a promise about any one lot inside it. A local percolation test, typically $750-$1,850 (around $1,300 typical), is the only way to know what one lot in Dolores County will actually do.

What a system would cost here

With 85.3% of Dolores 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 Dolores County, CO compares

Nationally, Dolores County, CO is the 1,667-most-constrained of 3,058 rated counties for septic soil. Within Colorado alone it ranks 35 of 63.

Before you act on this

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