Jefferson County Soil Data
Jefferson County, Illinois
Avg pH
6.1
Texture
Silt Loam
Drainage
N/A
Organic Matter
1.8%
Hydrologic Group
N/A
Data Story
About Soil in Jefferson County, Illinois
Acidic Silts in Jefferson County
Jefferson County soils lean acidic with an average pH of 6.13, falling below the national median of 6.5. While local taxonomic data is unavailable, the overall soil score of 65.1 suggests a challenging environment compared to the Illinois state average of 73.6.
Silt-Heavy Composition and Low Clay
The soil contains a high 69.6% silt concentration paired with 19.8% clay and 10.5% sand. This silt-dominant mix provides a smooth texture that is easy to work, though it may be prone to erosion without proper cover.
High Water Capacity, Low Organic Matter
Organic matter content sits at 1.81%, which is significantly lower than the state average of 2.94%. However, the available water capacity of 0.211 in/in is better than the state benchmark, meaning these soils hold onto moisture effectively during dry spells.
Regional Hydrology and Development
Specific drainage class and hydrologic group data are not available for this county. Given the low soil score and high silt content, builders and farmers should expect moderate permeability and prioritize drainage management.
Thriving in Hardiness Zone 6b
The local 6b hardiness zone allows for a long growing season for tomatoes, peppers, and sweet potatoes. Gardeners can overcome the lower organic matter by adding compost to boost the soil's natural fertility.
Soil Composition
Soil pH
Soil Series
Detailed soil series data not yet available for this county.
Hydrologic Group
Hydrologic group data not available.
Drainage Class
Drainage class data not available.
Soil Profile
Dominant texture: Silt Loam
Typical soil profile. Actual depths vary by location.
USDA Soil Orders
Frequently Asked Questions
What type of soil does Jefferson County have?
Jefferson County's soil is classified as Silt Loam. This indicates the relative proportions of sand, silt, and clay — 11% sand, 70% silt, and 20% clay. Loamy soils hold moisture well and support a wide range of plants.
Is Jefferson County's soil acidic or alkaline?
Jefferson County's soil has a pH of 6.1, which is moderately acidic. This range suits many crops and is common across much of the eastern US.
What is the drainage class for Jefferson County?
Drainage class data is not currently available for Jefferson County.
What crops or plants grow well in Jefferson County's soil?
Based on Jefferson County's Silt Loam texture, pH of 6.1, and drainage class, the soil is well suited for vegetables, grains, and most field crops, row crops and vegetable gardens.
What USDA soil order is found in Jefferson County?
The dominant USDA soil order for Jefferson County is not currently available in our dataset.
Planning your lawn? View lawn care data for Jefferson County on LawnByCounty.com →
Other Counties in Illinois
Soil data sourced from USDA SSURGO via Soil Data Access. Data is informational only and should not be used as a substitute for on-site soil testing. Contact your local NRCS office for site-specific soil information.