| Business | Phone |
| Water Quality Bureau 1410 N Hilton St, Boise 83706 | (208) 327-7900 |
| Water Resources Dept 1301 N Orchard St, Boise 83706 | (208) 327-7900 |
| Water Rights Protection 2735 Airport Way, Boise 83705 | (208) 334-2190 |
| Environmental Quality Div 1410 N Hilton St, Boise 83706 | (208) 373-0502 |
| Environmental Quality Div 1445 N Orchard St, Boise 83706 | (208) 373-0550 |
| Hazardous Materials Bureau 4040 W Guard St, Boise 83705 | (208) 422-5725 |