| Business | Phone |
| Miracle-Ear 834 W 4th St, Waterloo 50702 | (319) 234-1530 |
| National Hearing Ctr 1334 Flammang Dr, Waterloo 50702 | (319) 233-1240 |
| Beltone Hearing Aid Service 1038 Alabar Ave, Waterloo 50701 | (319) 234-2427 |
| Black Hawk Hearing Aid Center 2710 Saint Francis Dr # 411, Waterloo 50702 | (319) 234-1422 |
| Potter's Hearing Aid Svc 1416 W 4th St, Waterloo 50702 | (319) 232-7113 |
| Hams 834 W 4th St, Waterloo 50702 | (319) 234-7968 |