Grayson County, Texas
The dominant drainage class is Moderately 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 Grayson County, Texas.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Fairlie and Houston Black clays, 1 to 3 percent slopes | 64K | Moderately well drained | D | Very limited | Very limited |
| Normangee clay loam, 1 to 3 percent slopes | 47K | Moderately well drained | C | Very limited | Very limited |
| Water | 31K | D | Not rated | Not rated | |
| Crockett loam, 2 to 5 percent slopes, eroded | 25K | Moderately well drained | D | Very limited | Very limited |
| Wilson silty clay loam, 1 to 3 percent slopes | 23K | Moderately well drained | D | Very limited | Very limited |
| Whitewright-Eddy-Howe complex, 5 to 12 percent slopes | 21K | Well drained | D | Very limited | Very limited |
| Crockett loam, 1 to 3 percent slopes | 20K | Moderately well drained | D | Very limited | Very limited |
| Vertel clay, 3 to 5 percent slopes | 19K | Well drained | D | Very limited | Very limited |
| Elbon soils, frequently flooded | 18K | Moderately well drained | C | Very limited | Very limited |
| Wilson silty clay loam, 0 to 1 percent slopes | 18K | Moderately well drained | D | Very limited | Very limited |
| Heiden clay, 3 to 5 percent slopes | 17K | Well drained | D | Very limited | Very limited |
| Vertel clay, 5 to 12 percent slopes | 17K | Well drained | D | Very limited | Very limited |
| Crosstell fine sandy loam, 2 to 5 percent slopes, eroded | 17K | Well drained | D | Very limited | Very limited |
| Bunyan and Whitesboro soils, frequently flooded | 16K | Well drained | B | Very limited | Very limited |
| Austin silty clay, 2 to 5 percent slopes, moderately eroded | 16K | Well drained | D | Somewhat limited | Very limited |
| Aubrey-Birome complex, 3 to 12 percent slopes | 16K | Well drained | D | Somewhat limited | Very limited |
| Heiden clay, 1 to 3 percent slopes | 15K | Well drained | D | Very limited | Very limited |
| Austin silty clay, 1 to 3 percent slopes | 13K | Well drained | D | Somewhat limited | Very limited |
| Aubrey fine sandy loam, 5 to 8 percent slopes | 11K | Well drained | D | Somewhat limited | Very limited |
| Callisburg fine sandy loam, 2 to 5 percent slopes erode d | 10K | Well drained | C | Somewhat limited | Very limited |
What This Means
Building & Foundations
About 77% 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.