| Business | Phone |
| Watertown Building Inspector 23 2nd St Ne, Watertown 57201 | (605) 882-6201 |
| Watertown City Auditorium 125 S Broadway, Watertown 57201 | (605) 882-6260 |
| Watertown Engineer's Office 23 2nd St Ne, Watertown 57201 | (605) 882-6202 |
| Watertown Finance Office 23 2nd St Ne, Watertown 57201 | (605) 882-6203 |
| Watertown Ice Arena Expo Ctr 112 21st St Sw, Watertown 57201 | (605) 882-6266 |
| Watertown Sewer Collection 1300 11th St Ne, Watertown 57201 | (605) 882-6241 |
| Watertown Street Supt 730 Arrow Ave Ne, Watertown 57201 | (605) 882-6207 |
| Watertown Waste Water Treatmnt 1300 11th St Se, Watertown 57201 | (605) 882-6246 |
| Watertown Water Filtration 336 S Lake Dr, Watertown 57201 | (605) 882-6245 |
| Upper Big Sioux Watershed 605 3rd Ave Nw, Watertown 57201 | (605) 882-5250 |
| Bramble Park Zoo 800 10th St Nw, Watertown 57201 | (605) 882-6269 |
| Focus Watertown 1200 Mickelson Dr, Watertown 57201 | (605) 884-0340 |