Name Sites Samples
Tangipahoa Parish 2 6
Tanzania 22 191
Tarrant County 3 29
Taylor County 1 1
Telfair County 16 20
Teller County 1 3
Tensas Parish 10 25
Terrebonne Parish 7 15
Terrell County 9 27
Texas County 3 12
Thayer County 1 1
Tippah County 1 2
Tippecanoe County 4 18
Tipton County 3 5
Titus County 21 208
Todd County 1 3
Tolland County 16 39
Tompkins County 1 2
Towns County 1 2
Transylvania County 1 1
Trimble County 1 2
Troup County 1 2
Trousdale County 2 10
Tulsa County 2 4
Turkey 10 80
Turkmenistan 1 0
Tuscaloosa County 11 129
Twiggs County 1 1
Tyler County 1 1
Uganda 10 63