Soil series profile
Crockett soil series
Crockett is a moderately well drained soil with a loam surface, mapped on 1,324,041 acres in 50 counties across 2 states. Hydrologic group D.
- Drainage class
- Moderately well drained 100% of mapped acres
- Hydrologic group
- D 64% of mapped acres
- Typical topsoil pH
- 6.5 slightly acidic · range 6.5–6.7
- Mapped area
- 1.3M acres in 50 counties, 2 states
Typical Crockett profile
Texture and pH by depth
Show as a table
| Depth | Texture | pH | Clay | Sand | Organic matter |
|---|---|---|---|---|---|
| 0–8 in (A) | Loam | 6.5 | 14% | 40% | 1.25% |
| 8–25 in (Btss) | Clay | 6.7 | 46% | 39% | 0.5% |
| 25–45 in (Btkss) | Clay | 7.3 | 44% | 35% | 0.35% |
| 45–53 in (BCk) | Clay | 7.8 | 41% | 35% | 0.3% |
| 53–72 in (Cdk) | Clay loam | 7.8 | 34% | 31% | 0.2% |
What this means
What Crockett soil means for gardens, lawns and septic systems
For gardens
Typical topsoil in Crockett soils is slightly acidic: pH 6.5 (most land between 6.5 and 6.7), the range most vegetables, flowers and lawn grasses prefer.
Loamy topsoil (loam, silt loam and similar) covers 90% of mapped Crockett acres: generally the easiest soil to garden, holding moisture without staying waterlogged. The most common surface texture is loam (48% of mapped Crockett acres).
100% of mapped Crockett acres is moderately well to excessively drained, which suits most garden plants.
For lawns and yards
On >99% 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 94% of the acres in mapped Crockett soils very limited, 0% somewhat limited and 0% not limited (6% 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 Crockett soil is found
Mapped acres
Crockett is mapped in Texas and Oklahoma.
| County | Acres | Share of county land |
|---|---|---|
| Navarro County, TX | 139,469 | 21.6% |
| Hopkins County, TX | 137,558 | 27.8% |
| Hunt County, TX | 112,229 | 20.8% |
| Limestone County, TX | 83,486 | 14.3% |
| Bastrop County, TX | 80,506 | 14.1% |
| Van Zandt County, TX | 62,602 | 11.5% |
| Caldwell County, TX | 61,403 | 17.6% |
| Guadalupe County, TX | 54,357 | 11.9% |
| Kaufman County, TX | 53,093 | 10.6% |
| Grayson County, TX | 47,810 | 8.0% |
| Falls County, TX | 39,742 | 8.1% |
| Freestone County, TX | 35,008 | 6.3% |
| Lamar County, TX | 30,893 | 5.3% |
| Milam County, TX | 29,734 | 4.6% |
| Gonzales County, TX | 27,531 | 4.0% |
| Rains County, TX | 25,467 | 17.1% |
| Fannin County, TX | 23,391 | 4.1% |
| Franklin County, TX | 20,982 | 11.4% |
| Leon County, TX | 19,146 | 2.8% |
| Bryan County, OK | 18,602 | 3.2% |
| DeWitt County, TX | 18,588 | 3.2% |
| Robertson County, TX | 18,496 | 3.4% |
| Cooke County, TX | 18,494 | 3.3% |
| Lee County, TX | 16,091 | 4.0% |
| Hill County, TX | 15,986 | 2.6% |
| Washington County, TX | 14,637 | 3.8% |
| Austin County, TX | 12,809 | 3.1% |
| Brazos County, TX | 11,477 | 3.1% |
| Wilson County, TX | 10,628 | 2.1% |
| Burleson County, TX | 9,017 | 2.1% |
| Delta County, TX | 8,178 | 4.9% |
| Ellis County, TX | 7,653 | 1.3% |
| Denton County, TX | 7,516 | 1.3% |
| Williamson County, TX | 6,853 | 1.0% |
| Fayette County, TX | 6,435 | 1.1% |
| Grimes County, TX | 5,899 | 1.2% |
| McLennan County, TX | 4,592 | 0.7% |
| Montgomery County, TX | 4,579 | 0.7% |
| Red River County, TX | 4,284 | 0.6% |
| Collin County, TX | 3,376 | 0.6% |
| Henderson County, TX | 3,333 | 0.6% |
| Titus County, TX | 3,271 | 1.2% |
| Dallas County, TX | 3,059 | 0.5% |
| Madison County, TX | 2,510 | 0.8% |
| Travis County, TX | 1,344 | 0.2% |
| Waller County, TX | 977 | 0.3% |
| Rockwall County, TX | 365 | 0.4% |
| Tarrant County, TX | 325 | 0.1% |
| Bell County, TX | 142 | 0.0% |
| Anderson County, TX | 118 | 0.0% |
Septic absorption fields
NRCS rating, share of Crockett acres
Show as a table
| Category | Share of acres |
|---|---|
| Not limited | 0.0% |
| Somewhat limited | 0.0% |
| Very limited | 94.1% |
| Not rated | 5.9% |
Drainage, water table and flooding
Share of Crockett 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 2–4% (median 2%).
- 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 | 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 | 36.1% |
| D: very slow infiltration (clayey, shallow or wet) | 63.8% |
| 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 | 0.1% |
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 Crockett (component kind "Series") in SSURGO: 1,324,041 acres.
- Method
- Shares are by mapped acres of Crockett components. The profile comes from the single largest Crockett component. Full methodology.