| Business | Phone |
| Wisconsin Water Assn 1402 Pankratz St, Madison 53704 | (608) 241-9551 |
| Water Utility-Operations Ctr 110 S Paterson St, Madison 53703 | (608) 266-4661 |
| Monona Sewer Utility Svc 5211 Schluter Rd, Madison 53716 | (608) 222-2525 |
| Madison Water Utility 523 E Main St, Madison 53703 | (608) 266-4651 |