Interactive Watershed Maps
Do you know which watershed you live in? Find out today!
Use our interactive map to find your watershed.
Simply enter your address, then click within the highlighted outline to explore your local watershed area. You can also add or remove map layers to view floodplain boundaries, wetland areas, and other important watershed features.
HUC? What the Heck!
What does HUC mean in terms of watersheds?
What is a Hydrologic Unit Code (HUC)?
HUC stands for Hydrologic Unit Code, a standardized system used to identify and classify watersheds across the United States. Each hydrologic unit is a land area that drains water to a specific point on a stream or river—typically called a drainage area or watershed.
These units are organized using a numerical code ranging from 2 to 12 digits, depending on the level of classification. The more digits in the code, the smaller and more specific the watershed.
How is a Hydrologic Unit Defined?
A hydrologic unit is determined by starting at an outlet point (usually where a stream ends or joins a larger river) and following the highest elevation points—called ridge lines—that separate one drainage area from another. These boundaries form the edges of the watershed.
- dep.wv.gov
USGS.gov
Map of all the HUC - 12 Subwatersheds in DeKalb County
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