Soil series profile

Elliott soil series

Elliott is a somewhat poorly drained soil with a silt loam surface, mapped on 358,663 acres in 38 counties across 4 states. Hydrologic group C/D.

#899 by mapped area fine Aquic Argiudolls (Mollisols)

Drainage class
Somewhat poorly drained
>99% of mapped acres
Hydrologic group
C/D
98% of mapped acres
Typical topsoil pH
6.8
neutral · range 6.5–6.8
Mapped area
359k
acres in 38 counties, 4 states

Typical Elliott profile

Texture and pH by depth

Typical Elliott soil profile by depth 0 in 10 in 20 in 30 in 40 in 50 in 0–9 in · Ap · pH 6.8 · 25% clay Silt loam 9–13 in · A · pH 6.4 · 30% clay Silty clay loam 13–17 in · 2Bt1 · pH 6.6 · 42% clay Silty clay 17–35 in · 2Bt2 · pH 7.6 · 35% clay Silty clay loam 35–60 in · 2Cd · pH 8.1 · 30% clay Silty 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 Elliott horizons (representative values)
Depth Texture pH Clay Sand Organic matter
0–9 in (Ap) Silt loam 6.8 25% 10% 4.3%
9–13 in (A) Silty clay loam 6.4 30% 8% 3.3%
13–17 in (2Bt1) Silty clay 6.6 42% 7% 1%
17–35 in (2Bt2) Silty clay loam 7.6 35% 10% 0.4%
35–60 in (2Cd) Silty clay loam 8.1 30% 10% 0.2%

Representative values from the most extensive Elliott map unit (Elliott silt loam, 2 to 4 percent slopes, survey area IL197). 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 Elliott soil means for gardens, lawns and septic systems

For gardens

Typical topsoil in Elliott soils is neutral: pH 6.8 (most land between 6.5 and 6.8), the range most vegetables, flowers and lawn grasses prefer.

Loamy topsoil (loam, silt loam and similar) covers >99% of mapped Elliott acres: generally the easiest soil to garden, holding moisture without staying waterlogged. The most common surface texture is silt loam (92% of mapped Elliott acres).

>99% of mapped Elliott 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 >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.

A seasonal high water table comes within 18 inches of the surface on 98% 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 Elliott soils very limited, 0% somewhat limited and 0% not limited.

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 Elliott soil is found

Mapped acres

Elliott is mapped in Illinois, Indiana, Wisconsin and Ohio.

Counties with the most mapped Elliott soil
County Acres Share of county land
Will County, IL 78,773 15.0%
Vermilion County, IL 45,857 8.1%
Ford County, IL 26,731 8.6%
Kankakee County, IL 25,205 5.9%
Lake County, IN 21,735 6.8%
Grundy County, IL 18,972 7.2%
Livingston County, IL 17,049 2.6%
Racine County, WI 16,255 7.7%
Kenosha County, WI 12,924 7.5%
Cook County, IL 12,731 2.1%
Lake County, IL 9,713 3.5%
DuPage County, IL 9,247 4.4%
Porter County, IN 8,738 3.3%
Iroquois County, IL 8,537 1.2%
LaSalle County, IL 7,680 1.1%
Fond du Lac County, WI 5,736 1.2%
Warren County, IN 4,882 2.2%
McHenry County, IL 4,595 1.3%
White County, IN 4,212 1.3%
Kane County, IL 3,412 1.0%
Mercer County, OH 2,713 0.9%
Crawford County, OH 2,356 0.9%
Wyandot County, OH 2,207 0.8%
Marion County, OH 1,541 0.6%
Benton County, IN 1,371 0.5%
Erie County, OH 1,016 0.6%
Milwaukee County, WI 829 0.5%
Hancock County, OH 782 0.2%
Waukesha County, WI 745 0.2%
Champaign County, IL 715 0.1%
Winnebago County, IL 562 0.2%
Van Wert County, OH 410 0.2%
Jasper County, IN 185 0.1%
Boone County, IL 133 0.1%
McLean County, IL 100 0.0%
Kendall County, IL 13 0.0%
Seneca County, OH 1 0.0%
Huron County, OH 0 0.0%

Septic absorption fields

NRCS rating, share of Elliott acres

Not limited 0%
Somewhat limited 0%
Very limited >99%
Not rated <1%
Septic tank absorption field rating across mapped Elliott acres. Scale 0 to 100% of mapped land.
Show as a table
Septic tank absorption field rating across mapped Elliott acres.
CategoryShare of acres
Not limited0.0%
Somewhat limited0.0%
Very limited99.9%
Not rated0.1%

Drainage, water table and flooding

Share of Elliott acres

Depth to seasonal high water table
About 1.5 feet (18 in) (median where reported); within 18 inches on 98% of acres.
Flooding
Not mapped as flooding on most acres.
Slope
Typically 1–3% (median 1%).
Topsoil organic matter
Median 4.3%.

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 Elliott acres. Scale 0 to 100% of mapped land.
Show as a table
Drainage class across mapped Elliott acres.
CategoryShare of acres
Excessively drained0.0%
Somewhat excessively drained0.0%
Well drained0.0%
Moderately well drained0.0%
Somewhat poorly drained99.9%
Poorly drained0.0%
Very poorly drained0.0%
Not rated0.1%

Hydrologic soil group

A: fast infiltration (mostly sandy or gravelly) 0%
B: moderate infiltration 0%
C: slow infiltration 2%
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 0%
C/D: D as is, C if drained 98%
Not rated <1%
Hydrologic soil group across mapped Elliott acres. Scale 0 to 100% of mapped land.
Show as a table
Hydrologic soil group across mapped Elliott acres.
CategoryShare of acres
A: fast infiltration (mostly sandy or gravelly)0.0%
B: moderate infiltration0.0%
C: slow infiltration1.8%
D: very slow infiltration (clayey, shallow or wet)0.4%
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 drained97.7%
Not rated0.1%

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 Elliott (component kind "Series") in SSURGO: 358,663 acres.
Method
Shares are by mapped acres of Elliott components. The profile comes from the single largest Elliott component. Full methodology.

Independent reference site. No government affiliation or endorsement.

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