Lucas County's SSURGO septic rating
Very limited
Lucas County, OH: USDA's soil survey calls 81.8% 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 339.668 square miles, home to 426,291 people.
What this number does and doesn't tell you
Nothing about Lucas 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.
Lucas County: conventional vs. engineered cost
81.8% of Lucas 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, Lucas County, OH ranks 1,937 most-constrained nationally, and 84 of 87 within Ohio.
Further reading
How this rating is built, and its real limits · Conventional vs. engineered septic systems