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How's My Waterway

How's My Waterway provides information about the conditions of local streams, lakes and other waters anywhere in the U.S.

How's My Waterway provides useful public information based on data that states have provided to EPA on a two-year cycle. More recent or more detailed water information may exist that is not yet available through EPA databases or other sources.

Technical users may want to obtain the national or statewide mapped data, upon which How's My Waterway is based.

How's My Waterway developed mainly as a quick-reference non-technical service. The following downloadable documents may also be educational and informative:

Additional background information