Soil series profile
Branyon soil series
Branyon is a moderately well drained soil with a clay surface, mapped on 436,863 acres in 52 counties across 2 states. Hydrologic group D.
- Drainage class
- Moderately well drained 100% of mapped acres
- Hydrologic group
- D 100% of mapped acres
- Typical topsoil pH
- 7.8 slightly alkaline · range 7.8–7.8
- Mapped area
- 437k acres in 52 counties, 2 states
Typical Branyon profile
Texture and pH by depth
Show as a table
| Depth | Texture | pH | Clay | Sand | Organic matter |
|---|---|---|---|---|---|
| 0–12 in (Ap) | Clay | 7.8 | 47% | 18% | 2% |
| 12–72 in (Bkss) | Clay | 7.8 | 53% | 14% | 1.25% |
| 72–80 in (BCkss) | Clay | 7.9 | 53% | 10% | 1.2% |

What this means
What Branyon soil means for gardens, lawns and septic systems
For gardens
Typical topsoil in Branyon soils is slightly alkaline: pH 7.8. Acid-loving plants such as blueberries and azaleas struggle without amended beds, and some trees and shrubs show iron chlorosis (yellow leaves with green veins).
Clayey topsoil covers 92% of mapped Branyon acres. Clay holds water and nutrients but drains slowly and compacts if worked wet: add compost, avoid tilling soggy soil and consider raised beds. The most common surface texture is clay (92% of mapped Branyon acres).
100% of mapped Branyon acres is moderately well to excessively drained, which suits most garden plants.
For lawns and yards
On 100% of mapped acres, rain soaks in slowly (hydrologic groups C and D, including dual groups that are D until drained). Expect runoff and puddles after heavy rain: core-aerate compacted lawns and keep ground sloping away from foundations.
For a septic system
For conventional septic absorption fields, NRCS rates 92% of the acres in mapped Branyon soils very limited, 0% somewhat limited and 0% not limited (8% not rated, such as urban land, pits or water).
Where the soil is very limited (slow permeability, a high water table, flooding, shallow bedrock or steep slopes), alternative systems such as mound or sand-filter designs are common and cost more.
Only a licensed site evaluation or perc test at the actual lot decides whether a system is allowed and which design.
Where Branyon soil is found
Mapped acres
Branyon is mapped in Texas and Oklahoma.
| County | Acres | Share of county land |
|---|---|---|
| Williamson County, TX | 77,577 | 10.8% |
| Guadalupe County, TX | 48,570 | 10.7% |
| Bexar County, TX | 45,919 | 5.8% |
| Ellis County, TX | 36,436 | 6.1% |
| Bell County, TX | 32,597 | 4.8% |
| Milam County, TX | 28,633 | 4.4% |
| Caldwell County, TX | 27,918 | 8.0% |
| Denton County, TX | 23,174 | 4.1% |
| McLennan County, TX | 22,748 | 3.4% |
| Falls County, TX | 13,092 | 2.7% |
| Dallas County, TX | 12,604 | 2.2% |
| Lavaca County, TX | 10,742 | 1.7% |
| Hill County, TX | 9,077 | 1.5% |
| Comal County, TX | 8,913 | 2.1% |
| Hays County, TX | 7,298 | 2.0% |
| Fayette County, TX | 3,800 | 0.6% |
| Tarrant County, TX | 3,098 | 0.6% |
| Montague County, TX | 3,066 | 0.5% |
| Gonzales County, TX | 2,790 | 0.4% |
| Limestone County, TX | 2,170 | 0.4% |
| Navarro County, TX | 2,157 | 0.3% |
| Red River County, TX | 1,934 | 0.3% |
| Bryan County, OK | 1,698 | 0.3% |
| Hunt County, TX | 1,586 | 0.3% |
| Kaufman County, TX | 1,542 | 0.3% |
| Travis County, TX | 1,328 | 0.2% |
| Collin County, TX | 1,126 | 0.2% |
| Bandera County, TX | 1,011 | 0.2% |
| DeWitt County, TX | 929 | 0.2% |
| Rockwall County, TX | 542 | 0.7% |
| Brazos County, TX | 313 | 0.1% |
| Burleson County, TX | 303 | 0.1% |
| Johnson County, TX | 293 | 0.1% |
| Fannin County, TX | 258 | 0.0% |
| Lamar County, TX | 191 | 0.0% |
| Colorado County, TX | 166 | 0.0% |
| Leon County, TX | 156 | 0.0% |
| Montgomery County, TX | 149 | 0.0% |
| Austin County, TX | 144 | 0.0% |
| Grayson County, TX | 108 | 0.0% |
| Henderson County, TX | 97 | 0.0% |
| Bastrop County, TX | 87 | 0.0% |
| Choctaw County, OK | 74 | 0.0% |
| Grimes County, TX | 68 | 0.0% |
| Madison County, TX | 66 | 0.0% |
| Delta County, TX | 61 | 0.0% |
| Washington County, TX | 60 | 0.0% |
| Atoka County, OK | 55 | 0.0% |
| Robertson County, TX | 53 | 0.0% |
| Anderson County, TX | 52 | 0.0% |
| Freestone County, TX | 30 | 0.0% |
| Waller County, TX | 5 | 0.0% |
Septic absorption fields
NRCS rating, share of Branyon acres
Show as a table
| Category | Share of acres |
|---|---|
| Not limited | 0.0% |
| Somewhat limited | 0.0% |
| Very limited | 92.4% |
| Not rated | 7.6% |
Drainage, water table and flooding
Share of Branyon acres
- Depth to seasonal high water table
- None reported within about 6.5 feet (median where reported).
- Flooding
- Not mapped as flooding on most acres.
- Slope
- Typically 0–2% (median 0%).
- Topsoil organic matter
- Median 2%.
Drainage class
Show as a table
| Category | Share of acres |
|---|---|
| Excessively drained | 0.0% |
| Somewhat excessively drained | 0.0% |
| Well drained | 0.0% |
| Moderately well drained | 100.0% |
| Somewhat poorly drained | 0.0% |
| Poorly drained | 0.0% |
| Very poorly drained | 0.0% |
Hydrologic soil group
Show as a table
| Category | Share of acres |
|---|---|
| A: fast infiltration (mostly sandy or gravelly) | 0.0% |
| B: moderate infiltration | 0.0% |
| C: slow infiltration | 0.0% |
| D: very slow infiltration (clayey, shallow or wet) | 100.0% |
| A/D: D as is, A if drained | 0.0% |
| B/D: D as is, B if drained | 0.0% |
| C/D: D as is, C if drained | 0.0% |
Sources & data dates
- Source
- USDA NRCS Soil Survey Geographic Database (SSURGO), queried through Soil Data Access. Public domain.
- Data date
- SSURGO as published on November 3, 2026 (most recent survey area update October 26, 2026). NRCS refreshes SSURGO each October.
- Scope
- All map unit components named Branyon (component kind "Series") in SSURGO: 436,863 acres.
- Method
- Shares are by mapped acres of Branyon components. The profile comes from the single largest Branyon component. Full methodology.