Kiowa County, Oklahoma
The dominant drainage class is Well drained and the dominant hydrologic group is D (very slow infiltration, high 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 Kiowa County, Oklahoma.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Hollister silty clay loam, 0 to 1 percent slopes, moist | 114K | Well drained | D | Very limited | Very limited |
| Tillman clay loam, 1 to 3 percent slopes | 59K | Well drained | C | Very limited | Very limited |
| Port silty clay loam, 0 to 1 percent slopes, occasionally flooded | 38K | Well drained | B | Very limited | Very limited |
| Vernon clay loam, 3 to 5 percent slopes | 31K | Well drained | D | Somewhat limited | Very limited |
| St. Paul silt loam, 1 to 3 percent slopes | 26K | Well drained | C | Somewhat limited | Very limited |
| Clairemont and Mangum soils, 0 to 1 percent slopes, frequently flooded | 25K | Well drained | B | Very limited | Very limited |
| Lawton loam, 1 to 3 percent slopes | 24K | Well drained | C | Somewhat limited | Very limited |
| Rock outcrop-Brico complex, 8 to 50 percent slopes | 23K | D | Very limited | Very limited | |
| Vernon-Knoco complex, 3 to 12 percent slopes | 20K | Well drained | D | Very limited | Very limited |
| Tillman-Hinkle complex, 1 to 3 percent slopes | 19K | Well drained | C | Very limited | Very limited |
| Miller clay, 0 to 1 percent slopes, occasionally flooded | 17K | Moderately well drained | D | Very limited | Very limited |
| St. Paul silt loam, 0 to 1 percent slopes | 17K | Well drained | C | Somewhat limited | Very limited |
| Foard silt loam, 0 to 1 percent slopes | 13K | Well drained | D | Very limited | Not limited |
| Lawton loam, 3 to 5 percent slopes | 12K | Well drained | C | Somewhat limited | Very limited |
| Water | 11K | D | Not rated | Not rated | |
| Lugert loam, 0 to 1 percent slopes, occasionally flooded | 10K | Well drained | B | Very limited | Very limited |
| Carey silt loam, 3 to 5 percent slopes, eroded | 10K | Well drained | B | Somewhat limited | Somewhat limited |
| Tobosa clay, 0 to 1 percent slopes | 9K | Well drained | D | Very limited | Very limited |
| Tillman-Vernon complex, 3 to 5 percent slopes, eroded | 9K | Well drained | C | Very limited | Very limited |
| McKnight fine sandy loam, 3 to 5 percent slopes | 9K | Well drained | C | Somewhat limited | Very limited |
What This Means
Building & Foundations
About 72% of soils are rated "very limited" for dwellings with basements. Specific challenges include shallow bedrock, steep slopes, flood-prone areas. A geotechnical assessment is recommended before building.
Septic Systems
About 93% 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.