Nemaha County, Nebraska
The most common soil here is Wymore, on about 16% of the land: a silty clay loam, smooth and slightly sticky. Pohocco and Yutan come next.
About 50% of the land drains well, and 13% stays wet for long stretches; groundwater comes within two feet of the surface under 15% of it.
USDA rates 84% of the land very limited for a standard septic drain field, and 59% very limited for homes with basements. That means extra cost or special design, not that it can't be done.
Worth knowing: 24% of the land floods occasionally or more, and bedrock lies within 40 inches under 2% of it.
Soils change over short distances, so look up an address below for the soil at that exact spot and the reasons behind each rating.
The soils you're most likely standing on
The biggest named soils in Nemaha County, Nebraska, each drawn five feet deep from its official USDA description, in its recorded colors.
Dots mark gravel; white flecks mark lime. Shares are by acres across the survey area, and each mapped patch usually mixes several of these soils.
The biggest mapped areas
The dominant drainage class is Well drained and the dominant hydrologic group is C (slow infiltration, moderate runoff). The most common soil order is Mollisols — grassland soils with a thick, dark, fertile topsoil rich in organic matter. This report summarizes the major soil map units across the survey area to help you understand what to expect when buying, building, or gardening in Nemaha County, Nebraska. Search your address to find the exact soil composition, drainage, and series details at your specific location.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Wymore silty clay, 3 to 6 percent slopes, eroded | 30K | Moderately well drained | D | Very limited | Very limited |
| Yutan silty clay loam, 6 to 11 percent slopes, eroded | 26K | Well drained | C | Somewhat limited | Very limited |
| Pohocco silty clay loam, 6 to 11 percent slopes, eroded | 19K | Well drained | C | Not limited | Somewhat limited |
| Pawnee clay loam, 4 to 8 percent slopes, eroded | 15K | Moderately well drained | D | Very limited | Very limited |
| Yutan silty clay loam, 2 to 6 percent slopes, eroded | 12K | Well drained | C | Somewhat limited | Very limited |
| Judson silt loam, 2 to 6 percent slopes | 12K | Well drained | C | Somewhat limited | Very limited |
| Wymore silty clay loam, 2 to 6 percent slopes | 10K | Moderately well drained | D | Very limited | Very limited |
| Nodaway silt loam, channeled, frequently flooded | 8K | Moderately well drained | B | Very limited | Very limited |
| Pohocco silty clay loam, 2 to 6 percent slopes, eroded | 7K | Well drained | C | Not limited | Somewhat limited |
| Nodaway silt loam, occasionally flooded | 7K | Moderately well drained | C | Very limited | Very limited |
| Nodaway-Colo silt loams, occasionally flooded | 7K | Moderately well drained | B | Very limited | Very limited |
| Pohocco, eroded-Ida silt loams, 11 to 17 percent slopes | 7K | Well drained | B | Somewhat limited | Somewhat limited |
| Gymer silty clay loam, 5 to 11 percent slopes, eroded | 6K | Well drained | C | Somewhat limited | Very limited |
| Aksarben silty clay loam, 2 to 6 percent slopes | 6K | Well drained | C | Very limited | Very limited |
| Ackmore silt loam, occasionally flooded | 5K | Somewhat poorly drained | C | Very limited | Very limited |
| Onawa silty clay, occasionally flooded | 5K | Somewhat poorly drained | D | Very limited | Very limited |
| Morrill clay loam, 6 to 11 percent slopes, eroded | 5K | Well drained | C | Somewhat limited | Very limited |
| Wymore silty clay loam, 3 to 11 percent slopes, eroded | 5K | Moderately well drained | D | Very limited | Very limited |
| Pohocco, eroded-Ida silt loams, 17 to 30 percent slopes | 5K | Well drained | B | Very limited | Very limited |
| Zook silt loam, occasionally flooded | 4K | Poorly drained | D | Very limited | Very limited |
Soil Orders in This Area
The USDA classifies every soil into one of 12 soil orders. Here are the dominant orders found in this survey area.
What This Means
Building & Foundations
About 59% of soils are rated "very limited" for dwellings with basements. Specific challenges include steep slopes, poor drainage in some areas, flood-prone areas. A geotechnical assessment is recommended before building.
Septic Systems
About 84% of soils are rated "very limited" for septic absorption fields. Despite good drainage overall, limitations may stem from shallow bedrock, steep slopes, or seasonal conditions. Engineered or alternative systems are frequently required. Always get a professional perc test before purchasing land that needs septic.
Gardening & Agriculture
Well-drained soils on sloped terrain — good for most plants but watch for erosion. Terracing, contour planting, and mulching help retain moisture and topsoil. Drip irrigation is more effective than sprinklers on slopes.