Name Sites Samples
Arenac County 1 1
Argentina 187 606
Armenia 8 19
Armstrong County 1 1
Ascension Parish 2 11
Ashley County 4 13
Assumption Parish 1 4
Atascosa County 6 28
Atkinson County 1 1
Atlantic County 2 4
Atoka County 14 34
Auglaize County 1 1
Augusta County 4 12
Austin County 4 19
Australia 1554 4592
Austria 80 286
Autauga County 3 3
Avoyelles Parish 5 20
Azerbaijan 2 9
Baldwin County 11 87
Baldwin County 2 2
Ballard County 2 37
Baltimore County 4 7
Bandera County 1 2
Barber County 3 6
Barbour County 3 5
Barnes County 1 1
Barnwell County 5 7
Bartow County 17 45
Bastrop County 8 19