Soil series profile

Clermont soil series

Clermont is a poorly drained soil with a silt loam surface, mapped on 181,414 acres in 9 counties in OH. Hydrologic group C/D.

#2009 by mapped area fine-silty Typic Glossaqualfs (Alfisols)

Drainage class
Poorly drained
>99% of mapped acres
Hydrologic group
C/D
>99% of mapped acres
Typical topsoil pH
5.0
very strongly acidic · range 5.0–5.0
Mapped area
181k
acres in 9 counties, 1 state

Typical Clermont profile

Texture and pH by depth

Typical Clermont soil profile by depth 0 in 20 in 40 in 60 in 0–7 in · Ap · pH 5.0 · 20% clay Silt loam 7–15 in · Eg · pH 4.6 · 20% clay Silt loam 15–31 in · B/E · pH 4.6 · 28% clay Silty clay loam 31–56 in · 2Btg · pH 5.9 · 35% clay Silty clay loam 56–79 in · 2Bt · pH 5.9 · 35% clay 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 Clermont horizons (representative values)
Depth Texture pH Clay Sand Organic matter
0–7 in (Ap) Silt loam 5.0 20% 11% 1.5%
7–15 in (Eg) Silt loam 4.6 20% 11% 0.75%
15–31 in (B/E) Silty clay loam 4.6 28% 7% 0.5%
31–56 in (2Btg) Silty clay loam 5.9 35% 20% 0.3%
56–79 in (2Bt) Clay loam 5.9 35% 22% 0.2%

Representative values from the most extensive Clermont map unit (Clermont silt loam, 0 to 1 percent slopes, survey area OH015). 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 Clermont soil means for gardens, lawns and septic systems

For gardens

Typical topsoil in Clermont 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 >99% of mapped Clermont acres: generally the easiest soil to garden, holding moisture without staying waterlogged. The most common surface texture is silt loam (>99% of mapped Clermont acres).

>99% of mapped Clermont 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 >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 >99% of the acres in mapped Clermont 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 Clermont soil is found

Mapped acres

Clermont is mapped in Ohio.

Counties with the most mapped Clermont soil
County Acres Share of county land
Brown County, OH 66,610 21.2%
Clermont County, OH 45,260 15.6%
Highland County, OH 32,275 9.1%
Warren County, OH 18,523 7.3%
Clinton County, OH 17,991 6.9%
Hamilton County, OH 302 0.1%
Ross County, OH 300 0.1%
Adams County, OH 146 0.0%
Butler County, OH 7 0.0%

Septic absorption fields

NRCS rating, share of Clermont acres

Not limited 0%
Somewhat limited 0%
Very limited >99%
Not rated <1%
Septic tank absorption field rating across mapped Clermont acres. Scale 0 to 100% of mapped land.
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Septic tank absorption field rating across mapped Clermont acres.
CategoryShare of acres
Not limited0.0%
Somewhat limited0.0%
Very limited99.8%
Not rated0.2%

Drainage, water table and flooding

Share of Clermont acres

Depth to seasonal high water table
About 0 inches (median where reported); within 18 inches on >99% of acres.
Flooding
Not mapped as flooding on most acres.
Slope
Typically 0–0% (median 0%).
Topsoil organic matter
Median 1.5%.

Drainage class

Excessively drained 0%
Somewhat excessively drained 0%
Well drained 0%
Moderately well drained 0%
Somewhat poorly drained 0%
Poorly drained >99%
Very poorly drained 0%
Not rated <1%
Drainage class across mapped Clermont acres. Scale 0 to 100% of mapped land.
Show as a table
Drainage class across mapped Clermont acres.
CategoryShare of acres
Excessively drained0.0%
Somewhat excessively drained0.0%
Well drained0.0%
Moderately well drained0.0%
Somewhat poorly drained0.0%
Poorly drained99.8%
Very poorly drained0.0%
Not rated0.2%

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) 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 >99%
Not rated <1%
Hydrologic soil group across mapped Clermont acres. Scale 0 to 100% of mapped land.
Show as a table
Hydrologic soil group across mapped Clermont 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)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 drained99.8%
Not rated0.2%

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 Clermont (component kind "Series") in SSURGO: 181,414 acres.
Method
Shares are by mapped acres of Clermont components. The profile comes from the single largest Clermont component. Full methodology.

Independent reference site. No government affiliation or endorsement.

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