Llano 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 Llano County, Texas.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Castell sandy loam, 1 to 5 percent slopes | 77K | Well drained | C | Somewhat limited | Very limited |
| Keese coarse sandy loam, 1 to 8 percent slopes, stony | 57K | Well drained | D | Very limited | Very limited |
| Keese-Rock outcrop complex, 1 to 12 percent slopes | 53K | Well drained | D | Very limited | Very limited |
| Ligon fine sandy loam, 1 to 5 percent slopes | 46K | Well drained | C | Somewhat limited | Very limited |
| Ligon cobbly fine sandy loam, 5 to 12 percent slopes | 45K | Well drained | C | Somewhat limited | Very limited |
| Voca gravelly sandy loam, 0 to 3 percent slopes | 38K | Well drained | C | Not limited | Very limited |
| Lou coarse sandy loam, 1 to 5 percent slopes | 36K | Well drained | C | Somewhat limited | Very limited |
| Katemcy sandy loam, 1 to 5 percent slopes | 29K | Well drained | C | Somewhat limited | Very limited |
| Keese-Rock outcrop complex, 8 to 35 percent slopes, stony | 28K | Well drained | D | Very limited | Very limited |
| Fieldcreek fine sandy loam, occasionally flooded | 19K | Well drained | A | Very limited | Very limited |
| Nebgen-Rock outcrop complex, 5 to 30 percent slopes, extremely stony | 18K | Well drained | D | Very limited | Very limited |
| Water | 17K | D | Not rated | Not rated | |
| Click very gravelly coarse sandy loam, 1 to 8 percent slopes | 16K | Well drained | A | Somewhat limited | Very limited |
| Roughcreek-Rock outcrop complex, 1 to 8 percent slopes, very stony | 11K | Well drained | D | Very limited | Very limited |
| Yates-Rock outcrop complex, 8 to 40 percent slopes, very stony | 10K | Well drained | D | Very limited | Very limited |
| Bauman loam, 0 to 2 percent slopes | 9K | Somewhat poorly drained | C | Very limited | Very limited |
| Eckrant-Rock outcrop complex, 5 to 30 percent slopes, very stony | 9K | Well drained | D | Very limited | Very limited |
| Campair sand, 1 to 5 percent slopes | 9K | Well drained | C | Very limited | Very limited |
| Loneoak sand, 0 to 3 percent slopes | 7K | Moderately well drained | C | Somewhat limited | Very limited |
| Honeycreek fine sandy loam, 1 to 3 percent slopes | 6K | Well drained | B | Not limited | Somewhat limited |
What This Means
Building & Foundations
About 41% of soils have significant building limitations, while the rest are generally suitable. Check specific sites carefully — conditions vary across the area.
Septic Systems
About 95% 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.