Name Sites Samples
Baxter County 1 1
Bayfield County 4 11
Beaufort County 2 2
Beaufort County 35 144
Beaver County 8 48
Beaver County 10 96
Becker County 2 7
Bedford County 2 3
Bedford County 1 1
Belarus 5 3
Belgium 169 631
Bell County 57 153
Beltrami County 10 19
Bennett County 1 2
Bennington County 10 52
Benson County 1 8
Benton County 1 3
Benton County 4 29
Benzie County 1 3
Berks County 6 19
Bertie County 2 4
Bibb County 1 6
Bienville Parish 1 9
Big Stone County 1 1
Billings County 2 2
Bladen County 1 4
Blaine County 3 6
Blanco County 1 1
Bleckley County 1 6
Blount County 1 2