Soil series profile

Falaya soil series

Falaya is a somewhat poorly drained soil with a silt loam surface, mapped on 970,386 acres in 54 counties across 7 states. Hydrologic group B/D.

#188 by mapped area coarse-silty Aeric Fluvaquents (Entisols)

Drainage class
Somewhat poorly drained
87% of mapped acres
Hydrologic group
B/D
79% of mapped acres
Typical topsoil pH
5.0
very strongly acidic · range 5.0–5.3
Mapped area
970k
acres in 54 counties, 7 states

Typical Falaya profile

Texture and pH by depth

Typical Falaya soil profile by depth 0 in 10 in 20 in 30 in 40 in 50 in 0–6 in · Ap · pH 5.0 · 12% clay Silt loam 6–18 in · C · pH 5.0 · 14% clay Silt loam 18–60 in · Cg · pH 5.0 · 14% clay Silt 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 Falaya horizons (representative values)
Depth Texture pH Clay Sand Organic matter
0–6 in (Ap) Silt loam 5.0 12% 20% 2%
6–18 in (C) Silt loam 5.0 14% 12% 0.2%
18–60 in (Cg) Silt loam 5.0 14% 12% 0.2%

Representative values from the most extensive Falaya map unit (Falaya silt loam, 0 to 2 percent slopes, frequently flooded, very brief, survey area TN157). 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 Falaya soil means for gardens, lawns and septic systems

For gardens

Typical topsoil in Falaya soils is very strongly acidic: pH 5.0 (most land between 5.0 and 5.3). 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 99% of mapped Falaya acres: generally the easiest soil to garden, holding moisture without staying waterlogged. The most common surface texture is silt loam (94% of mapped Falaya acres).

88% of mapped Falaya 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 98% 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 75% 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 99% of the acres in mapped Falaya soils very limited, 0% somewhat limited and 0% not limited (1% 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 98% of the acres (69% occasional, 28% 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 Falaya soil is found

Mapped acres

Falaya is mapped in Mississippi, Tennessee, Missouri, Arkansas, Alabama, Kentucky and Louisiana.

Counties with the most mapped Falaya soil
County Acres Share of county land
Shelby County, TN 78,470 16.0%
Calhoun County, MS 64,120 17.6%
Fayette County, TN 49,496 11.1%
Panola County, MS 48,439 11.5%
Stoddard County, MO 47,725 9.5%
Grenada County, MS 46,135 18.6%
Carroll County, TN 42,849 11.2%
Lincoln County, MS 36,980 10.0%
Gibson County, TN 33,408 8.7%
Obion County, TN 32,292 9.1%
Madison County, TN 31,902 9.0%
Dyer County, TN 31,555 9.5%
DeSoto County, MS 30,774 10.4%
Greene County, AL 29,969 8.9%
Weakley County, TN 28,091 7.6%
Tippah County, MS 27,706 10.0%
Tallahatchie County, MS 24,891 6.6%
Clay County, AR 24,377 6.0%
Claiborne County, MS 23,907 8.2%
Tate County, MS 21,234 8.7%
Pike County, MS 19,136 7.8%
Craighead County, AR 18,174 4.0%
Cape Girardeau County, MO 14,292 3.9%
Warren County, MS 12,458 3.4%
Graves County, KY 12,139 3.4%
Dunklin County, MO 12,054 3.6%
Adams County, MS 11,953 4.7%
Yazoo County, MS 11,128 2.0%
Jefferson County, MS 10,818 3.5%
Marshall County, MS 10,680 2.5%
Cleveland County, AR 9,872 2.6%
Poinsett County, AR 8,965 1.9%
Lee County, AR 8,246 2.1%
Greene County, AR 6,437 1.9%
Leflore County, MS 6,208 1.7%
Carroll County, MS 5,506 1.4%
Phillips County, AR 4,947 1.1%
Scott County, MO 4,805 1.9%
Pontotoc County, MS 4,244 1.5%
Bollinger County, MO 3,952 1.0%
St. Landry Parish, LA 3,264 0.6%
Tipton County, TN 3,260 1.1%
Hardin County, TN 3,138 0.9%
Holmes County, MS 2,833 0.6%
Walthall County, MS 2,520 1.0%
Quitman County, MS 1,970 0.8%
Crockett County, TN 1,510 0.8%
Haywood County, TN 430 0.1%
Butler County, MO 384 0.1%
Marshall County, KY 276 0.1%
McCracken County, KY 230 0.1%
Calloway County, KY 137 0.1%
Ballard County, KY 97 0.1%
Henderson County, KY 5 0.0%

Septic absorption fields

NRCS rating, share of Falaya acres

Not limited 0%
Somewhat limited 0%
Very limited 99%
Not rated 1%
Septic tank absorption field rating across mapped Falaya acres. Scale 0 to 100% of mapped land.
Show as a table
Septic tank absorption field rating across mapped Falaya acres.
CategoryShare of acres
Not limited0.0%
Somewhat limited0.0%
Very limited98.9%
Not rated1.1%

Drainage, water table and flooding

Share of Falaya acres

Depth to seasonal high water table
About 1.5 feet (18 in) (median where reported); within 18 inches on 75% of acres.
Flooding
Mapped as flooding on 98% of acres (69% occasional, 28% frequent).
Slope
Typically 0–1% (median 1%).
Topsoil organic matter
Median 1.8%.

Drainage class

Excessively drained 0%
Somewhat excessively drained 0%
Well drained 0%
Moderately well drained 12%
Somewhat poorly drained 87%
Poorly drained <1%
Very poorly drained 0%
Not rated <1%
Drainage class across mapped Falaya acres. Scale 0 to 100% of mapped land.
Show as a table
Drainage class across mapped Falaya acres.
CategoryShare of acres
Excessively drained0.0%
Somewhat excessively drained0.0%
Well drained0.0%
Moderately well drained11.7%
Somewhat poorly drained87.3%
Poorly drained0.4%
Very poorly drained0.0%
Not rated0.6%

Hydrologic soil group

A: fast infiltration (mostly sandy or gravelly) 0%
B: moderate infiltration 1%
C: slow infiltration 18%
D: very slow infiltration (clayey, shallow or wet) <1%
A/D: D as is, A if drained 0%
B/D: D as is, B if drained 79%
C/D: D as is, C if drained <1%
Not rated 1%
Hydrologic soil group across mapped Falaya acres. Scale 0 to 100% of mapped land.
Show as a table
Hydrologic soil group across mapped Falaya acres.
CategoryShare of acres
A: fast infiltration (mostly sandy or gravelly)0.0%
B: moderate infiltration1.3%
C: slow infiltration18.2%
D: very slow infiltration (clayey, shallow or wet)0.1%
A/D: D as is, A if drained0.0%
B/D: D as is, B if drained78.7%
C/D: D as is, C if drained0.6%
Not rated1.1%

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 Falaya (component kind "Series") in SSURGO: 970,386 acres.
Method
Shares are by mapped acres of Falaya components. The profile comes from the single largest Falaya component. Full methodology.

Independent reference site. No government affiliation or endorsement.

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