| Business | Phone |
| Left Hand Water District 6800 Nimbus Rd, Longmont 80503 | (303) 530-4200 |
| Longmont Water Treatment Plant 4651 Ute Hwy, Longmont 80503 | (303) 651-8481 |
| Longs Peak Water Assn 9875 Vermillion Rd, Longmont 80504 | (303) 776-3847 |
| St Vrain & Lefthand 9595 Nelson Rd # 203, Longmont 80501 | (303) 772-4060 |
| Water Conservation 1100 S Sherman St, Longmont 80501 | (303) 651-8348 |