Region
United States
4,434
California
719
West (U.S.)
300
Texas
239
Florida
237
Washington (State)
197
Arizona
195
Colorado
190
Oregon
187
New York (State)
167
Colorado River Watershed (Colo.-Mexico)
140
North America
137
Tennessee
137
New Mexico
127
England
126
Mississippi River Watershed
124
Idaho
118
Mexico, Gulf of
116
Minnesota
114
Hawaii
113
Northeastern States
111
Nevada
110
Columbia River Watershed
103
Pennsylvania
97
Wyoming
96
Kansas
93
China
92
Wisconsin
91
Louisiana
90
Montana
90
Great Lakes (North America)
85
North Carolina
85
Utah
83
New Jersey
81
Alaska
80
Pacific Coast
80
United States, West
79
Georgia
78
India
77
Missouri River Watershed
75
Colorado River (Colo.-Mexico)
74
Nebraska
67
Ohio River Watershed
67
Ohio
66
South Atlantic States
66
Arkansas
65
Saint Lawrence River Watershed
65
Great Basin
63
Massachusetts
62
Virginia
62
more ...