Sub-locations
| Name | Sites | Samples |
|---|---|---|
| Adams County | 3 | 3 |
| Alamosa County | 2 | 3 |
| Arapahoe County | 11 | 34 |
| Archuleta County | 2 | 7 |
| Baca County | 8 | 13 |
| Boulder County | 21 | 89 |
| Chaffee County | 8 | 22 |
| Cheyenne County | 2 | 11 |
| Clear Creek County | 1 | 1 |
| Conejos County | 0 | 0 |
| Custer County | 1 | 4 |
| Delta County | 17 | 129 |
| Denver County | 6 | 12 |
| Dolores County | 5 | 27 |
| Douglas County | 2 | 18 |
| Eagle County | 19 | 43 |
| Elbert County | 19 | 35 |
| El Paso County | 0 | 0 |
| Fremont County | 8 | 19 |
| Garfield County | 24 | 102 |
| Grand County | 41 | 170 |
| Gunnison County | 44 | 244 |
| Hinsdale County | 1 | 11 |
| Huerfano County | 8 | 16 |
| Jackson County | 7 | 35 |