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.
- 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
Show as a table
| 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% |

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.
Where Elliott soil is found
Mapped acres
Elliott is mapped in Illinois, Indiana, Wisconsin and Ohio.
| 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
Show as a table
| Category | Share of acres |
|---|---|
| Not limited | 0.0% |
| Somewhat limited | 0.0% |
| Very limited | 99.9% |
| Not rated | 0.1% |
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
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 | 99.9% |
| Poorly drained | 0.0% |
| Very poorly drained | 0.0% |
| Not rated | 0.1% |
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 | 1.8% |
| D: very slow infiltration (clayey, shallow or wet) | 0.4% |
| A/D: D as is, A if drained | 0.0% |
| B/D: D as is, B if drained | 0.0% |
| C/D: D as is, C if drained | 97.7% |
| Not rated | 0.1% |
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.