Comanche County, Oklahoma
The most common soil here is Foard, on about 14% of the land: a silt loam, smooth, like flour. Zaneis and Ashport come next.
About 91% of the land drains well; groundwater comes within two feet of the surface under 7% of it.
USDA rates 79% 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: 13% of the land floods occasionally or more, and bedrock lies within 40 inches under 42% 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 Comanche County, Oklahoma, 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 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 Comanche County, Oklahoma. 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 |
|---|---|---|---|---|---|
| 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 |
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 shallow bedrock, steep slopes, flood-prone areas. A geotechnical assessment is recommended before building.
Septic Systems
About 79% 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.