| Business | Phone |
| Northwest Electric Co Inc 11672 Gravois Rd, Sappington 63126 | (314) 842-7400 |
| Mac Power Inc 10634 Carroll Wood Way, Sappington 63128 | (314) 849-0914 |
| Mathews Electric Co Inc 10326 Kennerly Rd, Sappington 63128 | (314) 849-2677 |
| Enerco Electric Co Inc 10228 Rahning Rd, Sappington 63127 | (314) 842-8800 |