Bernalillo County, NM Septic Rating

Septic suitability in Bernalillo County, NM

Very limited

Bernalillo County, NM: USDA's soil survey calls 73.7% 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 1,161 square miles, home to 671,747 people.

What this number does and doesn't tell you

Two lots a mile apart in Bernalillo County can carry different soil, even though they share one countywide rating. Budget $750-$1,850 for a real perc test on any specific parcel - that's the only figure a permit application accepts.

Bernalillo County: conventional vs. engineered cost

73.7% of Bernalillo 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.

Where this sits nationally

Among the 3,058 rated counties on this site, Bernalillo County, NM ranks 2,337 most-constrained nationally, and 10 of 29 within New Mexico.

Before you act on this

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