Columbus County, NC Septic Rating

Columbus County's SSURGO septic rating

Very limited

Columbus County, NC: USDA's soil survey calls 84.5% of the county "Very limited" for a septic leach field. This is the reading that pushes a project toward an engineered system rather than a conventional one, covering that same share of Columbus County's land. The county spans 938 square miles, home to 50,054 people.

What this number does and doesn't tell you

Nothing about Columbus County, NC'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.

Columbus County: conventional vs. engineered cost

84.5% of Columbus 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, Columbus County, NC ranks 1,732 most-constrained nationally, and 34 of 97 within North Carolina.

Further reading

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