Rio Arriba County's SSURGO septic rating

Very limited

Rio Arriba County, NM's SSURGO dominant class comes back "Very limited", covering 80.3% of the county. This is the reading that pushes a project toward an engineered system rather than a conventional one, and it covers 80.3% of Rio Arriba County's land. For scale: 5,860.876 square miles and 39,955 people call Rio Arriba County home.

Before you rely on this for one lot

Rio Arriba County's rating is an average across the whole county, not a promise about any one lot inside it. The real answer for one lot is still a site-specific perc test, running about $750-$1,850 (typically near $1,300).

Budgeting for a system in Rio Arriba County, NM

Rio Arriba County's soil reading pushes the likely outcome toward an engineered system rather than a conventional one. 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 Rio Arriba County, NM compares

Among the 3,058 rated counties on this site, Rio Arriba County, NM ranks 2,027 most-constrained nationally, and 6 of 29 within New Mexico.

Further reading

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