| Business | Phone |
| Liberty Electric 405 Hanna Blvd, Waterloo 50701 | (319) 833-9394 |
| Menninga Electric Inc 2700 Falls Ave, Waterloo 50701 | (319) 232-3913 |
| Myers Electric Inc 1118 Ansborough Ave, Waterloo 50701 | (319) 234-5238 |
| Aaa Electric 843 E Big Rock Rd, Waterloo 50703 | (319) 232-2727 |
| All County Electrical Corp 1510 Falls Ave, Waterloo 50701 | (319) 234-2580 |
| Art Carter & Son Electric 725 Adams St, Waterloo 50703 | (319) 232-9808 |
| Bird Electric 616 Cornwall Ave, Waterloo 50702 | (319) 234-8418 |
| Black Hawk Electrical Co 1507 Commercial St, Waterloo 50702 | (319) 233-3387 |
| Paulson Electric Co 1915 Jefferson St, Waterloo 50702 | (319) 233-3543 |
| Scott's Electric Inc 2072 Howard Ave, Waterloo 50702 | (319) 232-6870 |
| Terry Henninger Electric 4031 Scenic Dr, Waterloo 50701 | (319) 232-6373 |
| Tippery Mechanical Contractors 2617 Orchard St, Waterloo 50702 | (319) 236-3361 |
| Current Electric 610 Magnolia Pkwy, Waterloo 50701 | (319) 296-1140 |
| Diversified Design & Dev 8538 Sage Rd, Waterloo 50703 | (319) 984-5722 |
| W & J Electric Svc 1502 Jefferson St, Waterloo 50702 | (319) 291-6805 |
| Reliable Systems 1510 Falls Ave, Waterloo 50701 | (319) 377-4877 |