Comanche 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 Comanche County, Oklahoma.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Foard and Tillman soils, 1 to 3 percent slopes | 85K | Well drained | D | Very limited | Very limited |
| Brico soils and Rock outcrop, 5 to 50 percent slopes | 46K | Well drained | C | Very limited | Very limited |
| Zaneis-Huska complex, 1 to 3 percent slopes | 44K | Well drained | B | Not limited | Somewhat limited |
| Vernon-Knoco complex, 3 to 12 percent slopes | 42K | Well drained | D | Very limited | Very limited |
| Lucien-Grainola-Zaneis complex, 5 to 12 percent slopes | 36K | Well drained | D | Very limited | Very limited |
| Brico-Rock outcrop complex, 5 to 40 percent slopes | 34K | Well drained | C | Very limited | Very limited |
| Foard-Hinkle silt loams complex, 1 to 3 percent slopes | 33K | Well drained | D | Very limited | Very limited |
| Ashport loam, 0 to 1 percent slopes, occasionally flooded | 32K | Well drained | B | Very limited | Very limited |
| Ashport clay loam, 0 to 1 percent slopes, occasionally flooded | 31K | Well drained | B | Very limited | Very limited |
| Rock outcrop-Brico complex, 3 to 20 percent slopes | 31K | D | Very limited | Very limited | |
| Vernon clay, 1 to 5 percent slopes | 18K | Well drained | D | Very limited | Very limited |
| Lawton loam, 1 to 3 percent slopes | 18K | Well drained | C | Somewhat limited | Very limited |
| Zaneis and Stephenville soils, 2 to 8 percent slopes, severely eroded | 17K | Well drained | B | Not limited | Somewhat limited |
| Vernon-Clairemont frequently flooded complex, 0 to 12 percent slopes | 16K | Well drained | D | Very limited | Very limited |
| Foard silt loam, 0 to 1 percent slopes | 15K | Well drained | D | Very limited | Not limited |
| Zaneis loam, 3 to 5 percent slopes, moderately eroded | 15K | Well drained | B | Somewhat limited | Somewhat limited |
| Kiti-Rock outcrop complex, 3 to 25 percent slopes | 13K | Well drained | D | Very limited | Very limited |
| Ashport, Port and Yahola soils, 0 to 1 percent slopes, frequently flooded | 13K | Well drained | B | Very limited | Very limited |
| Water | 12K | D | Not rated | Not rated | |
| Lawton loam, 3 to 5 percent slopes | 12K | Well drained | C | Somewhat limited | Very limited |
What This Means
Building & Foundations
About 79% 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 81% 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.