Region
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Mount Saint Helens
1
Mount Simon-Hinckley Aquifer (Minn.)
1
Mud Lake (Jefferson County, Idaho)
1
Mukilteo
1
Mukilteo (Wash.)
1
Nahiku Region
1
Natick
1
Nehalem Bay
1
Nehalem Bay (Or.)
1
Nevada
9
Nevada National Security Site
1
Nevada National Security Site (Nev.)
1
New Jersey
4
New Mexico
3
New Orleans
1
New Orleans Metropolitan Area
1
New Orleans Metropolitan Area (La.)
2
New York (State)
1
Newton
1
North America
1
North Carolina
2
North Dakota
3
Nye County
1
Ogallala Aquifer
1
Oklahoma
2
Ontario, Lake (N.Y. and Ont.)
1
Oregon
4
Pacific Coast
1
Pacific Coast (U.S.)
1
Parker, Lake (Lakeland, Fla.)
1
Pasco Basin
1
Pawcatuck River (R.I. and Conn.)
1
Pawtuxet Valley
1
Peace River
1
Peace River Valley
1
Pennsylvania
2
Poplar Island (Talbot County)
1
Prince William County
1
Rainy River (Minn. and Ont.)
1
Rainy River Watershed (Minn. and Ont.)
1
Rhode Island
3
Rhode River
1
Sacramento-San Joaquin Estuary
1
Sacramento-San Joaquin Estuary (Calif.)
1
Saint Charles County
1
Saint Helens, Mount (Wash.)
1
Saint Lawrence Island
1
Saint Lawrence River
1
Saint Paul Metropolitan Area
1
San Bernardino County
2
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