Soil series profile
Windthorst soil series
Windthorst is a moderately well drained soil with a fine sandy loam surface, mapped on 512,084 acres in 30 counties across 2 states. Hydrologic group C.
- Drainage class
- Moderately well drained 97% of mapped acres
- Hydrologic group
- C 92% of mapped acres
- Typical topsoil pH
- 6.2 slightly acidic · range 6.2–6.5
- Mapped area
- 512k acres in 30 counties, 2 states
Typical Windthorst profile
Texture and pH by depth
Show as a table
| Depth | Texture | pH | Clay | Sand | Organic matter |
|---|---|---|---|---|---|
| 0–10 in (A) | Fine sandy loam | 6.2 | 12% | 67% | 1.25% |
| 10–34 in (Bt1) | Sandy clay | 6.5 | 38% | 46% | 0.5% |
| 34–45 in (Bt2) | Sandy clay loam | 6.5 | 34% | 48% | 0.5% |
| 45–80 in (C) | Sandy clay loam | 7.4 | 25% | 50% | 0.25% |
What this means
What Windthorst soil means for gardens, lawns and septic systems
For gardens
Typical topsoil in Windthorst soils is slightly acidic: pH 6.2 (most land between 6.2 and 6.5), the range most vegetables, flowers and lawn grasses prefer.
Loamy topsoil (loam, silt loam and similar) covers 82% of mapped Windthorst acres: generally the easiest soil to garden, holding moisture without staying waterlogged. The most common surface texture is fine sandy loam (73% of mapped Windthorst acres).
100% of mapped Windthorst acres is moderately well to excessively drained, which suits most garden plants.
For lawns and yards
On 92% 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 89% of the acres in mapped Windthorst soils very limited, 0% somewhat limited and 0% not limited (11% 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 Windthorst soil is found
Mapped acres
Windthorst is mapped in Texas and Oklahoma.
| County | Acres | Share of county land |
|---|---|---|
| Montague County, TX | 102,781 | 17.4% |
| Carter County, OK | 89,844 | 17.1% |
| Parker County, TX | 64,501 | 11.2% |
| Erath County, TX | 61,540 | 8.9% |
| Wise County, TX | 43,148 | 7.5% |
| Love County, OK | 27,526 | 8.4% |
| Hood County, TX | 24,156 | 8.9% |
| Guadalupe County, TX | 19,204 | 4.2% |
| Cooke County, TX | 12,011 | 2.2% |
| Jack County, TX | 9,386 | 1.6% |
| Comanche County, TX | 7,987 | 1.3% |
| Eastland County, TX | 7,844 | 1.3% |
| Hamilton County, TX | 7,768 | 1.5% |
| Bosque County, TX | 7,593 | 1.2% |
| Somervell County, TX | 7,219 | 6.1% |
| Comanche County, OK | 6,412 | 0.9% |
| Palo Pinto County, TX | 3,518 | 0.6% |
| Callahan County, TX | 3,264 | 0.6% |
| Tarrant County, TX | 1,796 | 0.3% |
| Coryell County, TX | 1,514 | 0.2% |
| Johnston County, OK | 1,137 | 0.3% |
| Stephens County, TX | 798 | 0.1% |
| Brown County, TX | 621 | 0.1% |
| Young County, TX | 162 | 0.0% |
| Shackelford County, TX | 133 | 0.0% |
| Clay County, TX | 83 | 0.0% |
| McCulloch County, TX | 41 | 0.0% |
| Murray County, OK | 40 | 0.0% |
| Hill County, TX | 39 | 0.0% |
| Mills County, TX | 21 | 0.0% |
Septic absorption fields
NRCS rating, share of Windthorst acres
Show as a table
| Category | Share of acres |
|---|---|
| Not limited | 0.0% |
| Somewhat limited | 0.0% |
| Very limited | 88.9% |
| Not rated | 11.1% |
Drainage, water table and flooding
Share of Windthorst acres
- Depth to seasonal high water table
- About 2.5 feet (30 in) (median where reported).
- Flooding
- Not mapped as flooding on most acres.
- Slope
- Typically 2–8% (median 3%).
- Topsoil organic matter
- Median 1.2%.
Drainage class
Show as a table
| Category | Share of acres |
|---|---|
| Excessively drained | 0.0% |
| Somewhat excessively drained | 0.0% |
| Well drained | 3.5% |
| Moderately well drained | 96.5% |
| 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 | 92.0% |
| D: very slow infiltration (clayey, shallow or wet) | 0.0% |
| 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% |
| Not rated | 8.0% |
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 Windthorst (component kind "Series") in SSURGO: 512,084 acres.
- Method
- Shares are by mapped acres of Windthorst components. The profile comes from the single largest Windthorst component. Full methodology.