Oregon County, Missouri
The most common soil here is Alred, on about 14% of the land: a extremely cobbly loam, a balanced mix that crumbles in your hand. Clarksville and Scholten come next.
About 67% of the land drains well, and 2% stays wet for long stretches; groundwater comes within two feet of the surface under 41% of it.
USDA rates 87% of the land very limited for a standard septic drain field, and 70% very limited for homes with basements. That means extra cost or special design, not that it can't be done.
Worth knowing: 6% of the land floods occasionally or more, and bedrock lies within 40 inches under 28% 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 Oregon County, Missouri, 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 D (very slow infiltration, high runoff). The most common soil order is Ultisols — strongly weathered soils with clay-enriched subsoils, common in warm humid climates. 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 Oregon County, Missouri. 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 |
|---|---|---|---|---|---|
| Scholten-Poynor complex, 8 to 15 percent slopes | 44K | Moderately well drained | D | Very limited | Very limited |
| Scholten-Bendavis-Poynor complex, 8 to 15 percent slopes | 31K | Moderately well drained | D | Very limited | Very limited |
| Scholten-Poynor complex, 3 to 8 percent slopes | 27K | Moderately well drained | D | Very limited | Very limited |
| Alred very gravelly silt loam, 8 to 15 percent slopes | 26K | Well drained | C | Somewhat limited | Very limited |
| Alred-Gatewood complex, 15 to 35 percent slopes, stony | 25K | Well drained | C | Very limited | Very limited |
| Fanchon-Tonti complex, 3 to 8 percent slopes | 25K | Well drained | B | Not limited | Somewhat limited |
| Clarksville-Bendavis complex, 15 to 35 percent slopes, stony | 24K | Somewhat excessively drained | A | Very limited | Very limited |
| Alred-Gatewood complex, 8 to 15 percent slopes | 24K | Well drained | D | Somewhat limited | Very limited |
| Clarksville very gravelly silt loam, 15 to 35 percent slopes, stony | 17K | Somewhat excessively drained | B | Very limited | Very limited |
| Tonti-Taterhill complex, 3 to 8 percent slopes | 15K | Moderately well drained | D | Very limited | Very limited |
| Alred very gravelly silt loam, 1 to 8 percent slopes | 13K | Well drained | C | Somewhat limited | Very limited |
| Macedonia silt loam, 3 to 8 percent slopes | 11K | Well drained | D | Somewhat limited | Very limited |
| Alred extremely gravelly silt loam, 15 to 35 percent slopes | 11K | Well drained | C | Very limited | Very limited |
| Clarksville very gravelly silt loam, 3 to 8 percent slopes | 10K | Somewhat excessively drained | B | Not limited | Somewhat limited |
| Coulstone very gravelly sandy loam, 15 to 35 percent slopes, stony | 10K | Somewhat excessively drained | A | Very limited | Very limited |
| Captina silt loam, 3 to 8 percent slopes | 10K | Moderately well drained | C/D | Very limited | Very limited |
| Poynor-Scholten complex, 15 to 35 percent slopes | 9K | Well drained | B | Very limited | Very limited |
| Tilk very gravelly loam, 1 to 3 percent slopes, rarely flooded | 8K | Well drained | A | Very limited | Very limited |
| Clarksville very gravelly silt loam, 8 to 15 percent slopes | 8K | Somewhat excessively drained | A | Somewhat limited | Very limited |
| Alred-Ocie-Bendavis complex, 15 to 35 percent slopes, stony | 8K | Moderately well drained | C | 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 70% of soils are rated "very limited" for dwellings with basements. Specific challenges include steep slopes, flood-prone areas. A geotechnical assessment is recommended before building.
Septic Systems
About 87% 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.