| Business | Phone |
| Worldwide Wastewater Inc 3200 Travis St, Houston 77006 | (713) 522-3320 |
| Royal Leasing Co 4234 Richmond Ave, Houston 77027 | (713) 623-6185 |
| Pine Village Pud Waterplant Houston 77032 | (281) 219-1580 |
| Veolia Water Systems 14950 Heathrow Forest Pkwy200, Houston 77032 | (281) 985-5522 |
| Southwest Utilities Houston 77039 | (281) 442-6140 |
| Roywood Water 6734 Uvalde Rd, Houston 77049 | (281) 458-4561 |
| Northwest Harris County Mud 29 12435 Kilkenny Glen Dr, Houston 77065 | (281) 890-1207 |
| Wwwms Inc 13563 Bammel North Houston Rd, Houston 77066 | (281) 895-8547 |
| Southwest Water Consultants 14514 Champion Forest Dr, Houston 77069 | (281) 580-3444 |
| Reid Road Mud 10603 Fm 1960 Rd W, Houston 77070 | (281) 970-3154 |
| West Harris County Mud 8350 Fallbrook, Houston 77070 | (281) 890-4706 |
| American Water 419 Century Plaza Dr, Houston 77073 | (281) 821-1173 |
| Southern Water Corp 5710 Airline Dr, Houston 77076 | (713) 692-3595 |
| Nw 16 Water Plant 6610 Spring Crk, Houston 77084 | (832) 593-7281 |
| Trent Severn Environmental 16720 Pine Forest Ln, Houston 77084 | (281) 858-4754 |
| Trent Severn Environmental Svc 16337 Park Row, Houston 77084 | (281) 398-8211 |
| West Harris County Mud 8955 Aberdeen Lake Dr, Houston 77084 | (281) 859-7942 |
| Rsk Svc 7015 W Tidwell Rd, Houston 77092 | (713) 812-1080 |
| Sunbelt Fresh Water 2811 Mooney Rd, Houston 77093 | (281) 987-2892 |
| West Harris County Mud 9602 Kirkton Dr, Houston 77095 | (281) 463-3143 |
| West Harris County Mud 9711 Telge Rd, Houston 77095 | (281) 858-4163 |
| Sequoia Improvement District 14435 Sequoia Bend Blvd, Houston 77032 | (281) 449-1161 |
| Veolia Water North America 14950 Heathrow Forrest 200, Houston 77032 | (281) 449-1500 |
| United Water Svc 3100 Genoa Red Bluff Rd, Houston 77034 | (281) 487-9576 |
| Sunbelt Fresh Water Supply 410 W Gulf Bank Rd, Houston 77037 | (281) 272-9577 |
| Regional Water Corp 12841 Jones Rd 110, Houston 77070 | (281) 897-9100 |
| Water Environmental & Tech Svc 10607 Grant Rd 101, Houston 77070 | (281) 469-5740 |
| Severn Trent Svc 16337 Park Row, Houston 77084 | (281) 578-4200 |
| Sagemeadow Mud 10755 Hall Rd, Houston 77089 | (281) 481-4182 |