| Business | Phone |
| North Water District Lab Svc 8725 Fawn Trl, Conroe 77385 | (936) 321-6060 |
| North Water District Lab 8725 Fawn Trl, Conroe 77385 | (281) 363-8738 |
| Nova Biologicals 1775 E Loop 336 4, Conroe 77301 | (936) 756-5333 |
| Waggoner & Assoc Inc 10825 White Rock Rd, Conroe 77306 | (936) 231-1610 |