| Business | Phone |
| Environmental Development 17495 Village Green Dr, Houston 77040 | (832) 467-1599 |
| K & L Utility Svc Inc 15013 Lakeview Dr, Houston 77040 | (713) 937-1959 |
| Sunbelt Fresh Water 7934 Kellwood Dr, Houston 77040 | (713) 856-7321 |
| West Harris County Mud 9830 W Little York Rd, Houston 77040 | (713) 856-8314 |
| American Water 3100 Genoa Red Bluff Rd, Houston 77034 | (281) 487-6624 |
| Aqua Services Lp 11302 Tanner Rd, Houston 77041 | (713) 983-3500 |
| Water District Management Co 17707 Old Louetta Rd, Houston 77070 | (281) 376-8802 |
| Clear Lake Water Authority 900 Bay Area Blvd, Houston 77058 | (281) 488-1164 |
| Eco Resources Inc Houston 77039 | (281) 442-3242 |
| Emerald Forest 9811 Green Creek Cir, Houston 77070 | (281) 894-9531 |
| Memorial Villages Water Auth 8955 Gaylord St, Houston 77024 | (713) 465-8318 |
| Gulf Utility Svc Inc 14911 Stuebner Airline Rd # C, Houston 77069 | (281) 452-7315 |
| H20 Consulting Inc 5870 Highway 6 N, Houston 77084 | (281) 861-6215 |
| Harris County Fresh Water Sply 151 Black Rock Rd, Houston 77015 | (713) 455-5231 |
| Harris County Water Control 4635 Winfield Rd, Houston 77039 | (281) 449-4345 |
| Harris County Water Control 4901 Sandydale Ln, Houston 77039 | (281) 442-9072 |
| Harris County Water District 15998 T C Jester Blvd, Houston 77068 | (281) 866-0630 |
| Harris County Wcid 11802 1/2 Mclain Blvd, Houston 77071 | (281) 499-5539 |
| Harris County World Wc&Id 116 Houston 77090 | (281) 586-9767 |
| Kirkmont Municipal District 10102 Blackhawk Blvd, Houston 77089 | (281) 484-4325 |
| Nitsch & Son Utility Co 8115 Northline Dr, Houston 77037 | (281) 445-0337 |