Soil series profile
Clodine soil series
Clodine is a somewhat poorly drained soil with a fine sandy loam surface, mapped on 79,495 acres in 4 counties in TX. Hydrologic group C/D.
- Drainage class
- Somewhat poorly drained 100% of mapped acres
- Hydrologic group
- C/D 86% of mapped acres
- Typical topsoil pH
- 6.8 neutral · range 6.8–6.8
- Mapped area
- 79k acres in 4 counties, 1 state
Typical Clodine profile
Texture and pH by depth
Show as a table
| Depth | Texture | pH | Clay | Sand | Organic matter |
|---|---|---|---|---|---|
| 0–9 in (A) | Fine sandy loam | 6.8 | 5% | 61% | 1.32% |
| 9–23 in (Bt1) | Loam | 7.0 | 13% | 51% | 0.26% |
| 23–57 in (Bt2) | Loam | 8.3 | 16% | 50% | 0.19% |
| 57–80 in (Bt3) | Loam | 8.2 | 17% | 50% | 0.19% |

What this means
What Clodine soil means for gardens, lawns and septic systems
For gardens
Typical topsoil in Clodine soils is neutral: pH 6.8, the range most vegetables, flowers and lawn grasses prefer.
Loamy topsoil (loam, silt loam and similar) covers 92% of mapped Clodine acres: generally the easiest soil to garden, holding moisture without staying waterlogged. The most common surface texture is fine sandy loam (86% of mapped Clodine acres).
100% of mapped Clodine acres is somewhat poorly to very poorly drained, so soil stays soggy for long spells after rain and in wet seasons. Raised beds, plants that tolerate wet feet, and not working the soil while wet all help.
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.
A seasonal high water table comes within 18 inches of the surface on 100% of mapped acres, often in spring. Basements, sump pumps and lawns in low spots feel it first.
For a septic system
For conventional septic absorption fields, NRCS rates 92% of the acres in mapped Clodine 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 Clodine soil is found
Mapped acres
Clodine is mapped in Texas.
| County | Acres | Share of county land |
|---|---|---|
| Harris County, TX | 72,520 | 6.6% |
| Fort Bend County, TX | 5,423 | 1.0% |
| Waller County, TX | 1,236 | 0.4% |
| Austin County, TX | 315 | 0.1% |
Septic absorption fields
NRCS rating, share of Clodine acres
Show as a table
| Category | Share of acres |
|---|---|
| Not limited | 0.0% |
| Somewhat limited | 0.0% |
| Very limited | 92.2% |
| Not rated | 7.8% |
Drainage, water table and flooding
Share of Clodine acres
- Depth to seasonal high water table
- About 4 inches (median where reported); within 18 inches on 100% of acres.
- Flooding
- Not mapped as flooding on most acres.
- Slope
- Typically 0–0% (median 0%).
- Topsoil organic matter
- Median 1.3%.
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 | 0.0% |
| Somewhat poorly drained | 100.0% |
| 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) | 0.0% |
| A/D: D as is, A if drained | 0.0% |
| B/D: D as is, B if drained | 6.2% |
| C/D: D as is, C if drained | 86.0% |
| Not rated | 7.8% |
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 Clodine (component kind "Series") in SSURGO: 79,495 acres.
- Method
- Shares are by mapped acres of Clodine components. The profile comes from the single largest Clodine component. Full methodology.