Septic suitability in El Paso County, CO
Very limited
USDA puts El Paso County, CO at "Very limited" for septic absorption fields, the dominant reading across 61.3% of the county's soil. 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 2,126.424 square miles, home to 752,772 people.
What this number does and doesn't tell you
Nothing about El Paso County, CO'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.
El Paso County: conventional vs. engineered cost
61.3% of El Paso 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.
El Paso County's rank among Colorado counties
Among the 3,058 rated counties on this site, El Paso County, CO ranks 2,701 most-constrained nationally, and 47 of 63 within Colorado.
Related guides
How this rating is built, and its real limits · Conventional vs. engineered septic systems