Geographic Scope



geographic scope of the pmepThe PMEP estuarine and marine nearshore complex includes all marine and estuarine tidal and subtidal waters of the states of California, Oregon, and Washington, from the three-nautical mile boundary of the territorial sea landward to the high tide line, including the upstream extent of saltwater intrusion into coastal river systems (defined as upstream and landward to where ocean-derived salts measure less than 0.5 parts per thousand during the period of average annual low flow). It also includes those adjacent shorelands and marine riparian areas that provide inputs to these waters (e.g., filtration and storage of stormwater, large wood, nutrients, sediment supply). 

The PMEP is part of a three-state region from the U.S. border with Canada to the U.S. border with Mexico.
      • The land/water area within the Coastal Hydrologic SubRegions (USGS HUC2), including all offshore islands as well the area of major bays and estuaries, is 95,141 square miles.
      • The aquatic area offshore out to the 200m depth line, including all bay/estuary areas is an additional 24,034 square miles.
      • The total of the above areas combined = 119,165 square miles.