Sub-locations
| Name | Sites | Samples |
|---|---|---|
| Jefferson County | 16 | 121 |
| Kiowa County | 0 | 0 |
| Lake County | 0 | 0 |
| La Plata County | 55 | 361 |
| Larimer County | 47 | 223 |
| Las Animas County | 81 | 235 |
| Logan County | 7 | 21 |
| Mesa County | 101 | 318 |
| Mineral County | 3 | 5 |
| Moffat County | 149 | 690 |
| Montezuma County | 76 | 228 |
| Montrose County | 56 | 182 |
| Morgan County | 1 | 3 |
| Otero County | 3 | 7 |
| Ouray County | 6 | 24 |
| Park County | 5 | 31 |
| Pitkin County | 1 | 1 |
| Prowers County | 2 | 3 |
| Pueblo County | 14 | 49 |
| Rio Blanco County | 131 | 393 |
| Routt County | 6 | 15 |
| Saguache County | 3 | 12 |
| San Miguel County | 14 | 51 |
| Summit County | 7 | 73 |
| Teller County | 1 | 3 |