Brazoria 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 Brazoria County, Texas.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Lake Charles clay, 0 to 1 percent slopes | 256K | Moderately well drained | D | Very limited | Very limited |
| Pledger clay, 0 to 1 percent slopes, rarely flooded | 135K | Moderately well drained | D | Very limited | Very limited |
| Bernard clay loam, 0 to 1 percent slopes | 66K | Somewhat poorly drained | D | Very limited | Very limited |
| Bernard-Edna complex, 0 to 1 percent slopes | 49K | Somewhat poorly drained | D | Very limited | Very limited |
| Brazoria clay, 0 to 1 percent slopes, rarely flooded | 42K | Moderately well drained | D | Very limited | Very limited |
| Surfside clay, 0 to 1 percent slopes, occasionally flooded | 38K | Very poorly drained | D | Very limited | Very limited |
| Edna loam, 0 to 1 percent slopes | 38K | Somewhat poorly drained | D | Very limited | Very limited |
| Asa silty clay loam, 0 to 1 percent slopes, rarely flooded | 37K | Well drained | B | Very limited | Somewhat limited |
| Edna-Aris complex, 0 to 1 percent slopes | 26K | Somewhat poorly drained | D | Very limited | Very limited |
| Water, fresh | 24K | D | Not rated | Not rated | |
| Bacliff clay, 0 to 1 percent slopes, rarely flooded | 19K | Poorly drained | D | Very limited | Very limited |
| Francitas clay loam, 0 to 1 percent slopes, rarely flooded | 15K | Somewhat poorly drained | D | Very limited | Very limited |
| Narta fine sandy loam, 0 to 1 percent slopes, rarely flooded | 14K | Poorly drained | D | Very limited | Very limited |
| Norwood loam, 0 to 1 percent slopes, rarely flooded | 13K | Well drained | B | Very limited | Very limited |
| Maggies very fine sandy loam, 1 to 2 meter water depth | 13K | Subaqueous | D | Not rated | Not rated |
| Asa silt loam, 0 to 1 percent slopes, rarely flooded | 12K | Well drained | B | Very limited | Somewhat limited |
| Harris clay, 0 to 1 percent slopes, frequently flooded | 12K | Very poorly drained | D | Very limited | Very limited |
| Grassypoint, 0 to 1 percent slopes, very frequently flooded-Amarada, 0 to 1 meter water depth complex | 9K | Very poorly drained | D | Not rated | Not rated |
| Water, dredge channel, more than 2 meter water depth | 9K | D | Not rated | Not rated | |
| Jonesbay clay loam, 0 to 1 meter water depth | 9K | Subaqueous | D | Not rated | Not rated |
What This Means
Building & Foundations
About 92% of soils are rated "very limited" for dwellings with basements. Specific challenges include poor drainage in some areas, flood-prone areas. A geotechnical assessment is recommended before building.
Septic Systems
About 86% 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.