Missouri 8-Digit Hydrologic Units

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An 8-digit hydrologic unit (also called cataloging unit) is a geographic area representing part or all of a surface drainage basin, a combination of basins, or a distinct hydrologic feature. NRCS is updating hydrologic unit boundaries. Click here for more information.


Select an 8-digit hydrologic unit from the river basin name list or map below to make the locator map.

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