Soil series profile

Splendora soil series

Splendora is a somewhat poorly drained soil with a fine sandy loam surface, mapped on 118,448 acres in 9 counties in TX. Hydrologic group D.

#3035 by mapped area fine-loamy Oxyaquic Paleudalfs (Alfisols)

Drainage class
Somewhat poorly drained
100% of mapped acres
Hydrologic group
D
84% of mapped acres
Typical topsoil pH
4.6
very strongly acidic · range 4.6–4.6
Mapped area
118k
acres in 9 counties, 1 state

Typical Splendora profile

Texture and pH by depth

Typical Splendora soil profile by depth 0 in 20 in 40 in 60 in 0–6 in · A · pH 4.6 · 5% clay Fine sandy loam 6–15 in · E · pH 5.1 · 7% clay Fine sandy loam 15–28 in · Bt/E · pH 4.9 · 18% clay Loam 28–70 in · Bt · pH 4.9 · 22% clay Loam 70–80 in · Btg · pH 4.8 · 23% clay Sandy clay loam
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 Splendora horizons (representative values)
Depth Texture pH Clay Sand Organic matter
0–6 in (A) Fine sandy loam 4.6 5% 63% 1%
6–15 in (E) Fine sandy loam 5.1 7% 62% 0.25%
15–28 in (Bt/E) Loam 4.9 18% 52% 0.25%
28–70 in (Bt) Loam 4.9 22% 50% 0%
70–80 in (Btg) Sandy clay loam 4.8 23% 54% 0%

Representative values from the most extensive Splendora map unit (Splendora fine sandy loam, 0 to 2 percent slopes, survey area TX339). 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 Splendora soil means for gardens, lawns and septic systems

For gardens

Typical topsoil in Splendora soils is very strongly acidic: pH 4.6. Most vegetables and lawn grasses do best around 6.0 to 7.0, so lime is often needed; blueberries, azaleas and rhododendrons like it as it is.

Loamy topsoil (loam, silt loam and similar) covers 84% of mapped Splendora acres: generally the easiest soil to garden, holding moisture without staying waterlogged. The most common surface texture is fine sandy loam (84% of mapped Splendora acres).

100% of mapped Splendora 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 84% 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 84% of the acres in mapped Splendora soils very limited, 0% somewhat limited and 0% not limited (16% 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 Splendora soil is found

Mapped acres

Splendora is mapped in Texas.

Counties with the most mapped Splendora soil
County Acres Share of county land
Montgomery County, TX 47,535 7.1%
Liberty County, TX 31,652 4.2%
Harris County, TX 18,867 1.7%
San Jacinto County, TX 13,752 3.8%
Waller County, TX 4,958 1.5%
Grimes County, TX 1,287 0.3%
Polk County, TX 151 0.0%
Newton County, TX 149 0.0%
Jasper County, TX 97 0.0%

Septic absorption fields

NRCS rating, share of Splendora acres

Not limited 0%
Somewhat limited 0%
Very limited 84%
Not rated 16%
Septic tank absorption field rating across mapped Splendora acres. Scale 0 to 100% of mapped land.
Show as a table
Septic tank absorption field rating across mapped Splendora acres.
CategoryShare of acres
Not limited0.0%
Somewhat limited0.0%
Very limited84.0%
Not rated16.0%

Drainage, water table and flooding

Share of Splendora acres

Depth to seasonal high water table
About 1.2 feet (14 in) (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%.

Drainage class

Excessively drained 0%
Somewhat excessively drained 0%
Well drained 0%
Moderately well drained 0%
Somewhat poorly drained 100%
Poorly drained 0%
Very poorly drained 0%
Drainage class across mapped Splendora acres. Scale 0 to 100% of mapped land.
Show as a table
Drainage class across mapped Splendora acres.
CategoryShare of acres
Excessively drained0.0%
Somewhat excessively drained0.0%
Well drained0.0%
Moderately well drained0.0%
Somewhat poorly drained100.0%
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) 84%
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%
Not rated 16%
Hydrologic soil group across mapped Splendora acres. Scale 0 to 100% of mapped land.
Show as a table
Hydrologic soil group across mapped Splendora 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)84.1%
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%
Not rated15.9%

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 Splendora (component kind "Series") in SSURGO: 118,448 acres.
Method
Shares are by mapped acres of Splendora components. The profile comes from the single largest Splendora component. Full methodology.

Independent reference site. No government affiliation or endorsement.

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