Septic suitability in DeKalb County, GA

Somewhat limited

USDA puts DeKalb County, GA at "Somewhat limited" for septic absorption fields, the dominant reading across 38.5% of the county's soil. Modification usually rescues a conventional system at this rating - added fill or a larger field - rather than forcing a full engineered redesign. The county spans 267.665 square miles, home to 770,307 people.

What this number does and doesn't tell you

Two lots a mile apart in DeKalb 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.

DeKalb County: conventional vs. engineered cost

38.5% of DeKalb County carrying a "Somewhat 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.

How DeKalb County, GA compares

Among the 3,058 rated counties on this site, DeKalb County, GA ranks 2,986 most-constrained nationally, and 124 of 159 within Georgia.

Before you act on this

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