| Business | Phone |
| Delaware City Utility Billing 1 S Sandusky St, Delaware 43015 | (740) 368-1527 |
| Delaware Underground Utilities 3080 Us Highway 23 N, Delaware 43015 | (740) 363-9374 |
| Delaware Water Treatment Plant 3080 Us Highway 23 N, Delaware 43015 | (740) 368-1504 |