Dixon County, NE: the USDA septic-suitability picture
Very limited
Dixon County, NE's SSURGO dominant class comes back "Very limited", covering 68.5% of the county. This is the reading that pushes a project toward an engineered system rather than a conventional one, and it covers 68.5% of Dixon County's land. For scale: 475.621 square miles and 5,526 people call Dixon County home.
Before you rely on this for one lot
This is a countywide, area-weighted figure across every soil survey map unit in Dixon County, NE - never a reading for one specific parcel. The real answer for one lot is still a site-specific perc test, running about $750-$1,850 (typically near $1,300).
Budgeting for a system in Dixon County, NE
Dixon County's soil reading pushes the likely outcome toward an engineered system rather than a conventional one. 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, Dixon County, NE ranks 2,516 most-constrained nationally, and 65 of 93 within Nebraska.
Further reading
How this rating is built, and its real limits · Conventional vs. engineered septic systems