| Business | Phone |
| Breath Of Life Research Inst 21715 Kingsland Blvd 103, Katy 77450 | (281) 398-7353 |
| Clean Air Engineering 3311 Jan Ct, Katy 77493 | (281) 391-1919 |
| Eco Systems 17171 Park Row St, Katy 77450 | (281) 599-7834 |
| Sensortek 1051 Hidden Canyon Rd, Katy 77450 | (281) 392-9071 |
| Texas Research Partners 21318 Park Orchard Dr, Katy 77450 | (281) 579-8000 |
| R & C Joy Inc 4322 Apache Meadows Ln, Katy 77449 | (281) 463-6684 |
| Circuit Design Svc 1537 Dan Cox Ave, Katy 77493 | (281) 398-6767 |