Hydric Soils

Hydric soils are developed under sufficiently wet conditions to support the growth and regeneration of hydrophytic vegetation. All hydric soils must satisfy requirements of the Hydric Soil Definition. Hydric Soil Criteria are used to generate Hydric Soil Lists. Hydric Soil Lists contain a listing of soils that have any probability of being hydric. Hydric soil lists do not delineate soils in the field; they must be delineated in situ. Hydric Soil Criteria and Hydric Soil Lists are used as off site assessment tools. Hydric Soil Indicators are primarily morphological indicators used for field identification of hydric soils. A hydric soil is a soil that meets the Hydric Soil Definition; presence of the Hydric Soil Indicators is evidence that the definition has been met.

NRCS has developed local lists of map units that may contain hydric soils for each county in Ohio. These county lists are the preferred lists for use in making preliminary wetland determinations. NRCS no longer maintains a supplemental list of map units with hydric inclusions. The county lists of Hydric Soils categorize each map unit by component, percent composition, landform, hydric rating, and the hydric criteria met. Map units that have a predominance of components that meet the hydric criteria have a higher probability of being hydric than map units with a small percentage of components that meet the hydric criteria. Because of the natural variability of soil, not all map unit delineations may contain each listed minor component (component percentage generally less than 15%).

National list of Hydric Soils
County lists of Hydric Soils
County supplemental lists of map units with hydric inclusions  obsolete no longer maintained

This publication requires Microsoft Excel.
Ohio list of Hydric Soils

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