Septic suitability in Williams County, OH

Very limited

Williams County, OH: USDA's soil survey calls 98.4% of the county "Very limited" for a septic leach field. A standard gravity system routinely fails on ground like this; the same share of the county falls in USDA's worst absorption-field bucket outright. The county spans 420.66 square miles, home to 36,554 people.

What this number does and doesn't tell you

Williams County's rating is an average across the whole county, not a promise about any one lot inside it. Budget $750-$1,850 for a real perc test on any specific parcel - that's the only figure a permit application accepts.

Williams County: conventional vs. engineered cost

98.4% of Williams 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.

How Williams County, OH compares

Among the 3,058 rated counties on this site, Williams County, OH ranks 186 most-constrained nationally, and 22 of 87 within Ohio.

Before you act on this

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