Costilla County, CO Septic Rating

Costilla County's SSURGO septic rating

Very limited

Costilla County, CO: USDA's soil survey calls 65.2% of the county "Very limited" for a septic leach field. That reading means a conventional system is a poor bet here - it's already USDA's strictest "very limited" bucket, not a partial constraint. The county spans 1,228 square miles, home to 3,686 people.

What this number does and doesn't tell you

Nothing about Costilla 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.

Costilla County: conventional vs. engineered cost

65.2% of Costilla 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.

Costilla County's rank among Colorado counties

Among the 3,058 rated counties on this site, Costilla County, CO ranks 2,605 most-constrained nationally, and 45 of 63 within Colorado.

Related guides

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