| Business | Phone |
| Camp Electric & Heating Co 1126 Milton Rd, Alton 62002 | (618) 462-9287 |
| Central Electric Contracting 415 Ridge St, Alton 62002 | (618) 465-7321 |
| Rl Electrical Svc 901 Belle St, Alton 62002 | (618) 465-2127 |
| Frank's Electrical Svc 521 Lawton St, Alton 62002 | (618) 465-4573 |
| Martin Mechanical & Electrical 2217 Jetson St, Alton 62002 | (618) 463-8847 |