Washita County, Oklahoma
The dominant drainage class is Well drained and the dominant hydrologic group is C (slow infiltration, moderate runoff). 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 Washita County, Oklahoma.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| St. Paul silt loam, 1 to 3 percent slopes | 86K | Well drained | C | Somewhat limited | Very limited |
| Cordell-Rock outcrop complex, 1 to 20 percent slopes | 38K | Somewhat excessively drained | D | Very limited | Very limited |
| Carey silt loam, 3 to 5 percent slopes | 37K | Well drained | B | Somewhat limited | Somewhat limited |
| Carey silt loam, 1 to 3 percent slopes | 36K | Well drained | B | Not limited | Somewhat limited |
| Grandfield fine sandy loam, 1 to 3 percent slopes | 34K | Well drained | B | Not limited | Very limited |
| Obaro silty clay loam, 3 to 5 percent slopes, eroded | 28K | Well drained | C | Somewhat limited | Very limited |
| Clairemont silt loam, 0 to 1 percent slopes, occasionally flooded, cool | 27K | Well drained | B | Very limited | Very limited |
| Woodward-Quinlan complex, 3 to 5 percent slopes | 26K | Well drained | C | Somewhat limited | Very limited |
| Cordell silty clay loam, 1 to 5 percent slopes, eroded | 22K | Somewhat excessively drained | D | Very limited | Very limited |
| Obaro silty clay loam, 3 to 5 percent slopes | 17K | Well drained | C | Somewhat limited | Very limited |
| Quinlan-Woodward complex, 5 to 12 percent slopes | 17K | Well drained | D | Very limited | Very limited |
| Dill-Pixlee complex, 1 to 3 percent slopes | 15K | Well drained | B | Somewhat limited | Very limited |
| St. Paul silt loam, 0 to 1 percent slopes | 14K | Well drained | C | Somewhat limited | Very limited |
| Dill-Pixlee complex, 3 to 5 percent slopes | 14K | Well drained | B | Somewhat limited | Very limited |
| Quinlan-Obaro complex, 5 to 12 percent slopes | 13K | Well drained | D | Very limited | Very limited |
| Grandfield fine sandy loam, 3 to 5 percent slopes | 13K | Well drained | B | Not limited | Very limited |
| Port silt loam, 0 to 1 percent slopes, occasionally flooded | 11K | Well drained | B | Very limited | Very limited |
| Quinlan-Woodward complex, 3 to 5 percent slopes, eroded | 11K | Well drained | D | Very limited | Very limited |
| Obaro silty clay loam, 1 to 3 percent slopes | 10K | Well drained | C | Somewhat limited | Very limited |
| Woodward-Clairemont complex, 0 to 12 percent slopes | 10K | Well drained | C | Somewhat limited | Very limited |
What This Means
Building & Foundations
About 28% of soils have significant building limitations, while the rest are generally suitable. Check specific sites carefully — conditions vary across the area.
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
Drainage is generally favorable for gardening. Adding compost and mulch will improve fertility and water retention. Test your soil's pH before planting — most vegetables prefer 6.0-7.0.