Coastal Subnetwork
| Station Name | Receiving Water Group Name | Receiving Waterbody Name | HUC6 | HUC6 Name | Station ID | Drainage area at site (square miles) | Watershed total drainage area (square miles) | Comments |
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| Susquehanna River at Conowingo, MD [map] [data] | Northern Atlantic | Chesapeake Bay | 020503 | Southern Susquehanna | 01578310 | 27,100 | 27,500 | This station is operated in cooperation with the Maryland Department of Natural Resources and is part of the Chesapeake Bay RIM (River Input Monitoring) network. | | Potomac River at Chain Bridge at Washington, DC [map] [data] | Northern Atlantic | Chesapeake Bay | 020700 | Potomac | 01646580 | 11,570 | 14,670 | streamflow measured at the Potomac River near Washington, DC, Little Falls Pump Station (station 01646500); this station is also in the NAWQA network | | Altamaha River near Everett City, GA [photo] [map] [data] | Southern Atlantic | Altamaha River Estuary | 030701 | Altamaha | 02226160 | 14,000 | 14,400 | | | Mobile River at Mt. Vernon, AL [map] [data] | Gulf of Mexico | Mobile Bay | 031602 | Mobile Bay-Tombigbee | 02470500 | 43,000 | 44,600 | streamflow measured at the Mobile River at river mile 31.0 at Bucks, AL (station 02470629) | | St. Lawrence River at Cornwall, Ontario, near Massena, NY [map] [data] | Northern Atlantic | Gulf of St Lawrence | 041503 | St. Lawrence | 04264331 | 298,800 | 396,000 | | | Mississippi River at Belle Chasse, LA [map] [data] | Gulf of Mexico | Mississippi River Estuary | 080901 | Southern Mississippi-New Orleans | 07374525 | 1,130,000 | 1,150,000 | streamflow measured at the Mississippi River at Baton Rouge, LA (station 07374000); this station is being operated for evaluation and may be dropped from the network after 2010 | | Atchafalaya River at Melville, LA [map] [data] | Gulf of Mexico | Atchafalaya Bay | 080801 | Atchafalaya - Vermilion | 07381495 | 93,316 | 95,100 | streamflow measured at the Atchafalaya River at Simmesport, LA (USACE station 03045) | | Rio Grande near Brownsville, TX [map] [data] | Gulf of Mexico | Rio Grande River Estuary | 130900 | Southern Rio Grande | 08475000 | 176,333 | 185,000 | streamflow measured at the Rio Grande near Brownsville, TX, and Matamoros, Tamaulipas, Mexico (IBWC station 08-4750.00) | | Colorado River at NIB, above Morelos Dam, AZ [map] [data] | Sea of Cortez | Gulf of California | 150301 | Southern Colorado | 09522000 | 246,700 | 246,700 | | | San Joaquin River near Vernalis, CA [map] [data] | Southern Pacific | San Francisco Bay | 180400 | San Joaquin | 11303500 | 13,536 | 13,600 | this station is also in the NAWQA network | | Sacramento River at Freeport, CA [map] [data] | Southern Pacific | San Francisco Bay | 180201 | Southern Sacramento | 11447650 | 23,000 | 27,000 | this station is also in the NAWQA network | | Columbia River near Beaver Army Terminal, OR [map] [data] | Northern Pacific | Columbia River Estuary | 170800 | Southern Columbia | 14246900 | 256,900 | 258,000 | | | Yukon River at Pilot Station, AK [map] [data] | Bering Sea | Norton Sound | 190408 | Yukon Delta | 15565447 | 321,000 | 327,600 | | |
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