Nodaway County's SSURGO septic rating
Very limited
Nodaway County, MO's SSURGO dominant class comes back "Very limited", covering 99.2% of the county. That reading means a conventional system is a poor bet here - 99.2% of Nodaway County lands in the strictest "very limited" bucket USDA uses. The county spans 876.964 square miles, home to 20,503 people.
What this number does and doesn't tell you
Nothing about Nodaway County, MO'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.
Nodaway County: conventional vs. engineered cost
99.2% of Nodaway 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.
Nodaway County's rank among Missouri counties
Among the 3,058 rated counties on this site, Nodaway County, MO ranks 65 most-constrained nationally, and 12 of 114 within Missouri.
Further reading
How this rating is built, and its real limits · Conventional vs. engineered septic systems