| Business | Phone |
| Colorado Water Wizard 1550 Redwood Ave, Boulder 80304 | (303) 447-0789 |
| Multi-Pure Drinking Water Sys 4901 Euclid Ave, Boulder 80303 | (303) 530-2452 |
| Technology Economics 2280 Bluebell Ave, Boulder 80302 | (303) 447-1798 |
| Water Purification Tech 1705 14th St # 329, Boulder 80302 | (303) 938-1833 |