Columbia County, GA's soil, for a septic absorption field

Somewhat limited

72.8% of Columbia County, GA's surveyed soil comes back "Somewhat limited" in USDA's own SSURGO data, the county's dominant condition for a septic absorption field. That's a middle reading: not the outright failure "very limited" soil produces, but not a clean pass either. Design changes often bridge the gap. Columbia County covers 290.194 square miles and counts 167,472 residents.

This is a county figure, not a parcel figure

Columbia County's rating is an average across the whole county, not a promise about any one lot inside it. A site-specific perc test, usually $750-$1,850, is what a health department will actually require before permitting a lot in Columbia County.

System cost, conventional vs. engineered

Given Columbia County's rating, plan for the engineered-system range rather than the conventional one. The engineered-system range, $10,000-$40,000 (mound or aerobic treatment), is the more realistic number to plan around, against $3,000-$8,000 for a conventional system on the rare lot that passes.

Columbia County's rank among Georgia counties

Nationally, Columbia County, GA is the 3,034-most-constrained of 3,058 rated counties for septic soil. Within Georgia alone it ranks 150 of 159.

Related guides

How this rating is built, and its real limits · How a percolation test actually works