What Wood County, OH's soil rates for a septic system
Very limited
Soil across 97.2% of Wood County, OH rates "Very limited" in USDA's septic-absorption-field interpretation. That reading means a conventional system is a poor bet here - 97.2% of Wood County lands in the strictest "very limited" bucket USDA uses. Wood County, OH is 617.167 square miles with a population of 133,077.
What Wood County's reading doesn't cover
Two lots a mile apart in Wood County can carry different soil, even though they share one countywide rating. A local percolation test, typically $750-$1,850 (around $1,300 typical), is the only way to know what one lot in Wood County will actually do.
What a system would cost here
With 97.2% of Wood County rating "Very limited", a standard gravity system is not a safe assumption here. 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.
Wood County's rank among Ohio counties
Nationally, Wood County, OH is the 347-most-constrained of 3,058 rated counties for septic soil. Within Ohio alone it ranks 35 of 87.
Further reading
How this rating is built, and its real limits · Conventional vs. engineered septic systems