Champaign County, OH: the USDA septic-suitability picture
Very limited
Champaign County, OH's SSURGO dominant class comes back "Very limited", covering 99.3% of the county. This is the reading that pushes a project toward an engineered system rather than a conventional one, and it covers 99.3% of Champaign County's land. The county spans 428.977 square miles, home to 38,907 people.
What this number does and doesn't tell you
Nothing about Champaign County, OH's SSURGO figure applies to a specific address - it's a county-wide average. Budget $750-$1,850 for a real perc test on any specific parcel - that's the only figure a permit application accepts.
Champaign County: conventional vs. engineered cost
99.3% of Champaign 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.
Champaign County's rank among Ohio counties
Among the 3,058 rated counties on this site, Champaign County, OH ranks 47 most-constrained nationally, and 10 of 87 within Ohio.
Related guides
How this rating is built, and its real limits · Conventional vs. engineered septic systems