Septic suitability in Putnam County, FL
Very limited
Putnam County, FL's SSURGO dominant class comes back "Very limited", covering 80.7% of the county. This is the reading that pushes a project toward an engineered system rather than a conventional one, and it covers 80.7% of Putnam County's land. The county spans 728.396 square miles, home to 77,301 people.
What this number does and doesn't tell you
Two lots a mile apart in Putnam 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.
Putnam County: conventional vs. engineered cost
80.7% of Putnam 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, Putnam County, FL ranks 2,002 most-constrained nationally, and 42 of 65 within Florida.
Related guides
How this rating is built, and its real limits · Conventional vs. engineered septic systems