Almost all hydric soils have prominent physical characteristics. These characteristics are caused by a lack of soil oxygen due to repeated saturation and microbial activity, accumulation of organic matter  or other materials such as iron.

Begin by locating local list of hydric soil mapping units. Click here to view the list.

Look immediately below the A-horizon for hydric soil properties, if the A-horizon (surface layer below organic matter) is thicker than 10 inches. Click here to learn more about soil horizons.