| Business | Phone |
| Harris County Mud # 261 8903 Woodwind Lakes Dr, Houston 77040 | (713) 466-1248 |
| Harris County Mud 23 7314 Shady Mill Dr, Houston 77040 | (713) 937-6316 |
| Brazoria County Precinct No 2 7315 Corporate Dr, Houston 77036 | (281) 489-7163 |
| Harris County Fresh Water 3123 E Sam Houston Pkwy N, Houston 77015 | (713) 450-2682 |
| Harris County Mud 136 5028 Walnut Cove Dr, Houston 77084 | (281) 345-1337 |
| Harris County Mud 168 11210 Steeplecrest Dr, Houston 77065 | (281) 469-1451 |
| Harris County Mud 170 11202 Steeple Way Blvd, Houston 77065 | (281) 469-4913 |
| Harris County Mud 222 13123 Oak Ledge Dr, Houston 77065 | (281) 955-1262 |
| Harris County Mud 230 13811 Mandolin Dr, Houston 77070 | (832) 237-1120 |
| Harris County Mud 230 Cypresswood Dr, Houston 77070 | (281) 955-1585 |
| Harris County Mud 96 621 Rankin Rd, Houston 77073 | (281) 209-0906 |
| Harris County Mud Dist No 170 11400 Fallbrook Dr, Houston 77065 | (281) 890-3269 |
| Harris County Mud No 119 Water 9011 Willow Quill Dr, Houston 77088 | (281) 931-5281 |
| Harris County Mud No 136 18006 Clay Rd, Houston 77084 | (281) 463-3063 |
| Harris County Rwtp No 51 14701 Woodforest Blvd, Houston 77015 | (281) 452-1470 |
| Harris County Wcid 13535 River Trail Dr, Houston 77050 | (281) 590-6219 |
| Inpu Harris County Mhnr 1215 Dennis St, Houston 77004 | (713) 652-5138 |
| North Harris County Regl Water 3648 Fm 1960 Rd W, Houston 77068 | (281) 440-3924 |