| Business | Phone |
| Scharnweber Water Conditioning 2831 University Ave, Waterloo 50701 | (319) 235-7077 |
| Ecowater Systems 2719 Falls Ave, Waterloo 50701 | (319) 234-2851 |
| Cedar Valley Culligan 207 Ansborough Ave, Waterloo 50701 | (319) 235-0351 |
| Rainsoft Waterloo 50701 | (319) 233-2038 |