| Business | Phone |
| Water Resources 235 Promenade St # 200, Providence 2908 | (401) 222-3961 |
| Water Resources Board 100 N Main St # 5, Providence 2903 | (401) 222-2217 |
| Water Supply 3 Capitol Hl # 209, Providence 2908 | (401) 277-6867 |
| Groundwater Protection Program 235 Promenade St, Providence 2908 | (401) 277-2234 |
| Narragansett Bay Water Quality 1 Service Rd, Providence 2905 | (401) 461-8848 |