Marine Waters

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Water

As defined by U.S. Executive Order 13158 on MPAs: Waters under tidal influence, extending to the Mean High Water mark on land, and into river mouths to a salinity gradient of 5 parts/thousand, and the fresh waters of the Great Lakes to the Ordinary High Water mark on land.

NOAA National Marine Protected Areas Center — Marine Protected Areas Glossary retrieved 2014-06-07