Comanche County, Texas
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 Comanche County, Texas.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Purves-Bolar association, 1 to 8 percent slopes | 82K | Well drained | D | Very limited | Very limited |
| Chaney loamy sand, 1 to 5 percent slopes | 69K | Moderately well drained | C | Somewhat limited | Very limited |
| Demona loamy sand, 0 to 5 percent slopes | 35K | Moderately well drained | A | Very limited | Very limited |
| Tarrant association, undulating | 26K | Well drained | D | Very limited | Very limited |
| Chaney loamy sand, 1 to 5 percent slopes, eroded | 22K | Moderately well drained | C | Somewhat limited | Very limited |
| Nimrod fine sand, 0 to 5 percent slopes | 21K | Moderately well drained | A | Very limited | Very limited |
| Pedernales fine sandy loam, 1 to 5 percent slopes, moderately eroded | 17K | Well drained | C | Somewhat limited | Very limited |
| Patilo-Arenosa-Nimrod complex, 0 to 5 percent slopes | 14K | Well drained | A | Somewhat limited | Very limited |
| Pedernales loamy fine sand, 1 to 5 percent slopes | 14K | Well drained | C | Somewhat limited | Very limited |
| Krum silty clay, cool, 1 to 3 percent slopes | 13K | Well drained | C | Very limited | Very limited |
| Denton silty clay, 3 to 5 percent slopes | 13K | Well drained | C | Somewhat limited | Somewhat limited |
| Denton silty clay, 1 to 3 percent slopes | 12K | Well drained | C | Somewhat limited | Somewhat limited |
| Energy soils, frequently flooded | 11K | Well drained | B | Very limited | Very limited |
| Karnes loam, 1 to 5 percent slopes | 11K | Well drained | A | Not limited | Very limited |
| Frio silty clay, 0 to 1 percent slopes, occasionally flooded | 11K | Well drained | C | Very limited | Very limited |
| Bolar clay loam, 3 to 5 percent slopes | 10K | Well drained | C | Very limited | Very limited |
| Pedernales fine sandy loam, 1 to 3 percent slopes | 10K | Well drained | C | Somewhat limited | Very limited |
| Brackett-Karnes complex, 1 to 12 percent slopes | 10K | Well drained | D | Very limited | Very limited |
| Bosque loam, occasionally flooded | 9K | Well drained | B | Very limited | Very limited |
| Sunev clay loam, cool, 3 to 5 percent slopes | 8K | Well drained | B | Not limited | Somewhat limited |
What This Means
Building & Foundations
About 54% of soils are rated "very limited" for dwellings with basements. Specific challenges include shallow bedrock, flood-prone areas. A geotechnical assessment is recommended before building.
Septic Systems
About 92% 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.