| MS4 Program | ||
| Coordinator | 406/444.9194 | |
| Billings | 406/657.0273 | |
| Butte | 406/494.9612 | |
| Glendive | 406/345.8266 | |
| Great Falls | 406/454.5896 | |
| Missoula | 406/751.2024 | |
| Environmental Services Bureau | ||
| Bureau Chief | 406/444.0879 | |
| Engineering Section Supervisor | 406/444.7203 | |
| Erosion Control Specialist | 406/444.6395 | |