| Business | Phone |
| Pro-Tech Advisors Inc 12438 Ballas Trails Dr, Kirkwood 63122 | (314) 965-4560 |
| Quality Water Treatment Inc 483 S Kirkwood Rd, Kirkwood 63122 | (314) 966-2003 |
| Raven Environmental Product 333 Leffingwell Ave # 117, Kirkwood 63122 | (314) 822-1197 |