*These data are provisional and may be revised or adjusted in the future.
Cumulative Human Disease Cases by County - Colorado, 2004
| Adams County | 15 |
| Archuleta County | 2 |
| Baca County | 1 |
| Boulder County | 14 |
| Delta County | 27 |
| Denver County | 3 |
| Douglas County | 1 |
| El Paso County | 2 |
| Fremont County | 4 |
| Garfield County | 5 |
| Gunnison County | 1 |
| Jefferson County | 8 |
| Kit Carson County | 2 |
| La Plata County | 21 |
| Larimer County | 17 |
| Logan County | 5 |
| Mesa County | 127 |
| Montezuma County | 4 |
| Montrose County | 11 |
| Morgan County | 1 |
| Park County | 1 |
| Phillips County | 2 |
| Prowers County | 3 |
| Pueblo County | 4 |
| Rio Blanco County | 1 |
| Sedgwick County | 1 |
| Weld County | 8 |