Union Parish, Louisiana
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 Union Parish, Louisiana.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Ruston fine sandy loam, 1 to 5 percent slopes | 62K | Well drained | B | Not limited | Very limited |
| Darley gravelly fine sandy loam, 5 to 12 percent slopes | 55K | Well drained | C | Not limited | Very limited |
| Iuka-Dela complex, 0 to 1 percent slopes, frequently flooded | 40K | Moderately well drained | C | Very limited | Very limited |
| Guyton silt loam, 0 to 1 percent slopes, frequently flooded | 36K | Poorly drained | C/D | Very limited | Very limited |
| Darley gravelly fine sandy loam, 12 to 30 percent slopes | 33K | Well drained | C | Very limited | Very limited |
| Sacul very fine sandy loam, 5 to 12 percent slopes | 30K | Moderately well drained | C | Somewhat limited | Very limited |
| Smithdale fine sandy loam, 8 to 15 percent slopes | 22K | Well drained | B | Somewhat limited | Very limited |
| Kirvin fine sandy loam, 5 to 12 percent slopes | 22K | Well drained | C | Somewhat limited | Very limited |
| Malbis fine sandy loam, 1 to 5 percent slopes | 22K | Moderately well drained | C | Somewhat limited | Very limited |
| Sacul very fine sandy loam, 1 to 5 percent slopes | 19K | Moderately well drained | D | Very limited | Very limited |
| Water | 19K | D | Not rated | Not rated | |
| Litro clay, frequently flooded | 17K | Poorly drained | D | Very limited | Very limited |
| Kirvin fine sandy loam, 1 to 5 percent slopes | 17K | Well drained | C | Somewhat limited | Very limited |
| Libuse silt loam, 1 to 5 percent slopes | 16K | Moderately well drained | D | Very limited | Very limited |
| Savannah fine sandy loam, 1 to 5 percent slopes | 13K | Moderately well drained | C/D | Very limited | Very limited |
| Mahan fine sandy loam, 1 to 5 percent slopes | 12K | Well drained | B | Not limited | Very limited |
| Frizzell silt loam, 0 to 2 percent slopes | 12K | Somewhat poorly drained | C | Somewhat limited | Very limited |
| Sawyer silt loam, 1 to 5 percent slopes | 11K | Moderately well drained | C/D | Very limited | Very limited |
| Groom silty clay loam, frequently flooded | 11K | Poorly drained | C/D | Very limited | Very limited |
| Groom silt loam, occasionally flooded | 10K | Poorly drained | C/D | Very limited | Very limited |
What This Means
Building & Foundations
About 43% of soils have significant building limitations, while the rest are generally suitable. Check specific sites carefully — conditions vary across the area.
Septic Systems
About 96% 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.