Fulton County, OH: the USDA septic-suitability picture
Very limited
USDA puts Fulton County, OH at "Very limited" for septic absorption fields, the dominant reading across 99.3% of the county's soil. Expect the ground itself to work against a plain gravity system; USDA's strictest bucket alone covers 99.3% of the county. For scale: 405.45 square miles and 42,028 people call Fulton County home.
Before you rely on this for one lot
Fulton County's rating is an average across the whole county, not a promise about any one lot inside it. 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 Fulton County, OH
Fulton 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, Fulton County, OH ranks 46 most-constrained nationally, and 9 of 87 within Ohio.
Related guides
How this rating is built, and its real limits · Conventional vs. engineered septic systems