Soil series profile
Pullman soil series
Pullman is a well drained soil with a clay loam surface, mapped on 3,074,689 acres in 27 counties across 2 states. Hydrologic group C.
- Drainage class
- Well drained 100% of mapped acres
- Hydrologic group
- C 100% of mapped acres
- Typical topsoil pH
- 7.3 neutral · range 7.3–7.3
- Mapped area
- 3.1M acres in 27 counties, 2 states
Typical Pullman profile
Texture and pH by depth
Show as a table
| Depth | Texture | pH | Clay | Sand | Organic matter |
|---|---|---|---|---|---|
| 0–5 in (Ap) | Clay loam | 7.3 | 32% | 24% | 2.5% |
| 5–33 in (Bt) | Silty clay loam | 8.0 | 39% | 15% | 1.8% |
| 33–52 in (Btk1) | Clay loam | 8.1 | 39% | 22% | 0.26% |
| 52–80 in (Btk2) | Clay | 8.3 | 40% | 20% | 0.31% |
What this means
What Pullman soil means for gardens, lawns and septic systems
For gardens
Typical topsoil in Pullman soils is neutral: pH 7.3, the range most vegetables, flowers and lawn grasses prefer.
Loamy topsoil (loam, silt loam and similar) covers 100% of mapped Pullman acres: generally the easiest soil to garden, holding moisture without staying waterlogged. The most common surface texture is clay loam (90% of mapped Pullman acres).
100% of mapped Pullman 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 100% of the acres in mapped Pullman soils very limited, 0% somewhat limited and 0% not limited.
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 Pullman soil is found
Mapped acres
Pullman is mapped in Texas and New Mexico.
| County | Acres | Share of county land |
|---|---|---|
| Deaf Smith County, TX | 433,509 | 45.3% |
| Floyd County, TX | 391,842 | 61.7% |
| Swisher County, TX | 373,882 | 66.0% |
| Hale County, TX | 326,873 | 50.8% |
| Castro County, TX | 246,183 | 42.8% |
| Randall County, TX | 227,019 | 38.5% |
| Armstrong County, TX | 179,261 | 30.7% |
| Briscoe County, TX | 153,550 | 26.7% |
| Gray County, TX | 150,976 | 25.4% |
| Carson County, TX | 137,115 | 23.2% |
| Crosby County, TX | 118,565 | 20.6% |
| Parmer County, TX | 70,867 | 12.5% |
| Oldham County, TX | 69,635 | 7.3% |
| Lubbock County, TX | 55,782 | 9.7% |
| Potter County, TX | 47,483 | 8.1% |
| Dickens County, TX | 25,829 | 4.5% |
| Roberts County, TX | 22,142 | 3.7% |
| Curry County, NM | 14,821 | 1.7% |
| Donley County, TX | 12,140 | 2.0% |
| Quay County, NM | 6,853 | 0.4% |
| Motley County, TX | 4,021 | 0.6% |
| Howard County, TX | 2,990 | 0.5% |
| Hockley County, TX | 1,163 | 0.2% |
| Borden County, TX | 791 | 0.1% |
| Hemphill County, TX | 544 | 0.1% |
| Lynn County, TX | 514 | 0.1% |
| Wheeler County, TX | 342 | 0.1% |
Septic absorption fields
NRCS rating, share of Pullman acres
Show as a table
| Category | Share of acres |
|---|---|
| Not limited | 0.0% |
| Somewhat limited | 0.0% |
| Very limited | 100.0% |
Drainage, water table and flooding
Share of Pullman 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 2.5%.
Drainage class
Show as a table
| Category | Share of acres |
|---|---|
| Excessively drained | 0.0% |
| Somewhat excessively drained | 0.0% |
| Well drained | 100.0% |
| Moderately well drained | 0.0% |
| 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 | 100.0% |
| 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% |
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 Pullman (component kind "Series") in SSURGO: 3,074,689 acres.
- Method
- Shares are by mapped acres of Pullman components. The profile comes from the single largest Pullman component. Full methodology.