Region
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Truckee River Watershed (Calif. and Nev.)
1
Twentynine Palms
1
Twentynine Palms (Calif.)
1
Uinta River
1
Ukraine
1
United Arab Emirates
1
United States
142
Upper Klamath Lake Watershed
1
Utah
3
Virgin River
1
Virginia
1
Voiōtia (Greece)
1
Wando River
1
Warminster
1
Washington (State)
14
Washington Metropolitan Area
1
Washington Region
1
West (U.S.)
3
West North Central States
1
West United States
1
Willow Grove
1
Wisconsin
3
Wright-Patterson Air Force Base
1
Wyoming
2
Wyoming Range
1
Yakima River
1
Yakima River (Wash.)
1
Yampa River Watershed
1
Yang-ming-shan kuo chia kung yüan (Taiwan)
1
Yucca Mountain (Nev.)
1