Soil series profile

Stough soil series

Stough is a somewhat poorly drained soil with a fine sandy loam surface, mapped on 454,268 acres in 55 counties across 4 states. Hydrologic group C/D.

#656 by mapped area coarse-loamy Fragiaquic Paleudults (Ultisols)

Drainage class
Somewhat poorly drained
>99% of mapped acres
Hydrologic group
C/D
96% of mapped acres
Typical topsoil pH
5.0
very strongly acidic · range 5.0–5.0
Mapped area
454k
acres in 55 counties, 4 states

Typical Stough profile

Texture and pH by depth

Typical Stough soil profile by depth 0 in 20 in 40 in 60 in 0–3 in · A · pH 5.0 · 10% clay Fine sandy loam 3–6 in · E · pH 5.0 · 10% clay Fine sandy loam 6–15 in · Bt · pH 4.5 · 12% clay Loam 15–29 in · Btx1 · pH 4.5 · 17% clay Loam 29–70 in · Btx2 · pH 4.5 · 26% 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 Stough horizons (representative values)
Depth Texture pH Clay Sand Organic matter
0–3 in (A) Fine sandy loam 5.0 10% 64% 2.5%
3–6 in (E) Fine sandy loam 5.0 10% 64% 1.5%
6–15 in (Bt) Loam 4.5 12% 50% 1%
15–29 in (Btx1) Loam 4.5 17% 47% 0.3%
29–70 in (Btx2) Sandy clay loam 4.5 26% 55% 0.25%

Representative values from the most extensive Stough map unit (Stough fine sandy loam, 0 to 1 percent slopes, survey area LA103). 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 Stough soil means for gardens, lawns and septic systems

For gardens

Typical topsoil in Stough soils is very strongly acidic: pH 5.0. 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 97% of mapped Stough acres: generally the easiest soil to garden, holding moisture without staying waterlogged. The most common surface texture is fine sandy loam (83% of mapped Stough acres).

>99% of mapped Stough 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 97% 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 >99% 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 97% of the acres in mapped Stough soils very limited, 0% somewhat limited and 0% not limited (3% 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.

Flooding is mapped on 18% of the acres (10% occasional, <1% frequent).

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 Stough soil is found

Mapped acres

Stough is mapped in Mississippi, Louisiana, Arkansas and Alabama.

Counties with the most mapped Stough soil
County Acres Share of county land
St. Tammany Parish, LA 83,318 15.3%
Grant County, AR 45,478 11.3%
Smith County, MS 22,383 5.6%
Cleveland County, AR 22,013 5.8%
Hot Spring County, AR 16,443 4.2%
Bradley County, AR 15,476 3.7%
Monroe County, MS 15,113 3.2%
Washington Parish, LA 14,634 3.4%
Marion County, MS 14,341 4.3%
Clarke County, MS 13,702 3.2%
Noxubee County, MS 13,565 3.1%
Clark County, AR 11,962 2.2%
Kemper County, MS 11,513 2.9%
Wayne County, MS 9,313 1.9%
Perry County, MS 9,106 2.3%
Simpson County, MS 8,993 2.5%
Jasper County, MS 8,387 2.0%
Greene County, MS 8,351 1.8%
Fayette County, AL 8,250 2.4%
Tangipahoa Parish, LA 7,913 1.6%
Oktibbeha County, MS 7,427 2.6%
Clay County, MS 7,421 2.9%
Livingston Parish, LA 7,176 1.7%
Leake County, MS 6,170 1.7%
Covington County, MS 6,109 2.4%
Pike County, MS 5,746 2.3%
Marion County, AL 5,580 1.4%
Winston County, MS 4,516 1.2%
Neshoba County, MS 4,240 1.2%
Scott County, MS 4,031 1.0%
Jackson County, MS 3,874 0.9%
Forrest County, MS 3,845 1.4%
Monroe County, AL 3,519 0.6%
Jones County, MS 2,824 0.7%
Walthall County, MS 2,796 1.1%
Greene County, AL 2,733 0.8%
Jefferson Davis County, MS 1,894 0.8%
Webster County, MS 1,593 0.6%
Lamar County, MS 1,590 0.5%
Attala County, MS 1,563 0.3%
Elmore County, AL 1,526 0.4%
Harrison County, MS 1,398 0.4%
Choctaw County, MS 1,302 0.5%
Hancock County, MS 1,151 0.4%
Lauderdale County, MS 902 0.2%
St. Helena Parish, LA 694 0.3%
Rankin County, MS 589 0.1%
George County, MS 376 0.1%
Lawrence County, MS 358 0.1%
Drew County, AR 258 0.0%
Lee County, MS 235 0.1%
Pearl River County, MS 214 0.0%
Saline County, AR 171 0.0%
Montgomery County, AL 145 0.0%
Chickasaw County, MS 48 0.0%

Septic absorption fields

NRCS rating, share of Stough acres

Not limited 0%
Somewhat limited 0%
Very limited 97%
Not rated 3%
Septic tank absorption field rating across mapped Stough acres. Scale 0 to 100% of mapped land.
Show as a table
Septic tank absorption field rating across mapped Stough acres.
CategoryShare of acres
Not limited0.0%
Somewhat limited0.0%
Very limited96.8%
Not rated3.2%

Drainage, water table and flooding

Share of Stough acres

Depth to seasonal high water table
About 1.0 feet (12 in) (median where reported); within 18 inches on >99% of acres.
Flooding
Mapped as flooding on 18% of acres (10% occasional, <1% frequent).
Slope
Typically 0–2% (median 1%).
Topsoil organic matter
Median 2.5%.

Drainage class

Excessively drained 0%
Somewhat excessively drained 0%
Well drained 0%
Moderately well drained 0%
Somewhat poorly drained >99%
Poorly drained 0%
Very poorly drained 0%
Not rated <1%
Drainage class across mapped Stough acres. Scale 0 to 100% of mapped land.
Show as a table
Drainage class across mapped Stough acres.
CategoryShare of acres
Excessively drained0.0%
Somewhat excessively drained0.0%
Well drained0.0%
Moderately well drained0.0%
Somewhat poorly drained99.4%
Poorly drained0.0%
Very poorly drained0.0%
Not rated0.6%

Hydrologic soil group

A: fast infiltration (mostly sandy or gravelly) 0%
B: moderate infiltration 0%
C: slow infiltration <1%
D: very slow infiltration (clayey, shallow or wet) 0%
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 96%
Not rated 3%
Hydrologic soil group across mapped Stough acres. Scale 0 to 100% of mapped land.
Show as a table
Hydrologic soil group across mapped Stough acres.
CategoryShare of acres
A: fast infiltration (mostly sandy or gravelly)0.0%
B: moderate infiltration0.0%
C: slow infiltration0.9%
D: very slow infiltration (clayey, shallow or wet)0.0%
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 drained96.2%
Not rated2.9%

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 Stough (component kind "Series") in SSURGO: 454,268 acres.
Method
Shares are by mapped acres of Stough components. The profile comes from the single largest Stough component. Full methodology.

Independent reference site. No government affiliation or endorsement.

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