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.

#690 by mapped area fine Udic Haplusterts (Vertisols)

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

Typical Branyon soil profile by depth 0 in 20 in 40 in 60 in 0–12 in · Ap · pH 7.8 · 47% clay Clay 12–72 in · Bkss · pH 7.8 · 53% clay Clay 72–80 in · BCkss · pH 7.9 · 53% clay Clay
Depth to scale. More strongly shaded layers hold more clay. Horizon names are the soil survey's (A = topsoil, B = subsoil, C = parent material).
Show as a table
Typical Branyon horizons (representative values)
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%

Representative values from the most extensive Branyon map unit (Branyon clay, 0 to 1 percent slopes, survey area TX187). Other map units of this series vary within the series range.

Hands holding dark garden soil
Stock photo for illustration, not a sample of this soil series. Credit on the Sources & method page.

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.

Generated from the mapped numbers above using fixed rules, not a site visit. See how these notes are written.

Where Branyon soil is found

Mapped acres

Branyon is mapped in Texas and Oklahoma.

Counties with the most mapped Branyon soil
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

Not limited 0%
Somewhat limited 0%
Very limited 92%
Not rated 8%
Septic tank absorption field rating across mapped Branyon acres. Scale 0 to 100% of mapped land.
Show as a table
Septic tank absorption field rating across mapped Branyon acres.
CategoryShare of acres
Not limited0.0%
Somewhat limited0.0%
Very limited92.4%
Not rated7.6%

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

Excessively drained 0%
Somewhat excessively drained 0%
Well drained 0%
Moderately well drained 100%
Somewhat poorly drained 0%
Poorly drained 0%
Very poorly drained 0%
Drainage class across mapped Branyon acres. Scale 0 to 100% of mapped land.
Show as a table
Drainage class across mapped Branyon acres.
CategoryShare of acres
Excessively drained0.0%
Somewhat excessively drained0.0%
Well drained0.0%
Moderately well drained100.0%
Somewhat poorly drained0.0%
Poorly drained0.0%
Very poorly drained0.0%

Hydrologic soil group

A: fast infiltration (mostly sandy or gravelly) 0%
B: moderate infiltration 0%
C: slow infiltration 0%
D: very slow infiltration (clayey, shallow or wet) 100%
A/D: D as is, A if drained 0%
B/D: D as is, B if drained 0%
C/D: D as is, C if drained 0%
Hydrologic soil group across mapped Branyon acres. Scale 0 to 100% of mapped land.
Show as a table
Hydrologic soil group across mapped Branyon acres.
CategoryShare of acres
A: fast infiltration (mostly sandy or gravelly)0.0%
B: moderate infiltration0.0%
C: slow infiltration0.0%
D: very slow infiltration (clayey, shallow or wet)100.0%
A/D: D as is, A if drained0.0%
B/D: D as is, B if drained0.0%
C/D: D as is, C if drained0.0%

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.

Independent reference site. No government affiliation or endorsement.

Full narrative description: USDA Official Soil Series Description for Branyon.