Robeson County's SSURGO septic rating

Very limited

Robeson County, NC: USDA's soil survey calls 73.4% of the county "Very limited" for a septic leach field. Expect the ground itself to work against a plain gravity system; USDA's strictest bucket alone covers 73.4% of the county. For scale: 947.302 square miles and 118,624 people call Robeson County home.

Before you rely on this for one lot

Nothing about Robeson County, NC's SSURGO figure applies to a specific address - it's a county-wide average. 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 Robeson County, NC

Robeson 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.

Where this sits nationally

Among the 3,058 rated counties on this site, Robeson County, NC ranks 2,350 most-constrained nationally, and 45 of 97 within North Carolina.

Before you act on this

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