WILMINGTON WATER DEPARTMENT
Delaware — Community Water System — PWSID: DE0000663
System Information
| PWSID | DE0000663 |
| System Name | WILMINGTON WATER DEPARTMENT |
| System Type | Community Water System |
| Water Source | Surface Water |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 03 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Feb 10, 1979 |
| Last Reported | Feb 12, 2026 |
Location & Contact
| State | Delaware |
| City | WILMINGTON |
| ZIP Code | 19801 |
| Address | Water Work Center |
| Organization | OH, CHRISTIANA |
| Phone | 302-576-3017 |
Population & Service
| Population Served | 107,976 |
| Service Connections | 37,915 |
Drinking Water Violations (30)
This water system has 30 violations recorded in the EPA SDWIS database.
| Begin Date | End Date | Contaminant | Category | Health-Based | Major | Measured | Federal MCL | State MCL | Status | Return to Compliance | Rule |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Aug 1, 2023 | Aug 31, 2023 | MON | No | No | — | — | — | Resolved | Aug 31, 2023 | — | |
| Aug 1, 2023 | Aug 31, 2023 | MON | No | No | — | — | — | Resolved | Aug 31, 2023 | — | |
| Aug 1, 2023 | Aug 31, 2023 | MON | No | No | — | — | — | Resolved | Aug 31, 2023 | — | |
| Oct 1, 2017 | — | TT | Yes | No | — | — | — | Resolved | Nov 10, 2017 | — | |
| Oct 1, 2017 | — | TT | Yes | No | — | — | — | Resolved | Nov 10, 2017 | — | |
| Jul 1, 2015 | — | Other | No | No | — | — | — | Resolved | Jul 6, 2015 | — | |
| Jul 1, 2015 | — | Other | No | No | — | — | — | Resolved | Jul 6, 2015 | — | |
| May 1, 2015 | May 31, 2015 | MR | No | Yes | — | — | — | Resolved | May 31, 2015 | — | |
| May 1, 2015 | May 31, 2015 | MR | No | Yes | — | — | — | Resolved | May 31, 2015 | — | |
| May 1, 2015 | — | MR | No | No | — | — | — | Resolved | Sep 29, 2015 | — | |
| May 1, 2015 | — | MR | No | No | — | — | — | Resolved | Sep 29, 2015 | — | |
| Apr 1, 2015 | Apr 30, 2015 | MR | No | No | — | — | — | Resolved | Apr 30, 2015 | — | |
| Apr 1, 2015 | — | MR | No | No | — | — | — | Resolved | Sep 29, 2015 | — | |
| Apr 1, 2015 | — | MR | No | No | — | — | — | Resolved | Sep 29, 2015 | — | |
| Apr 1, 2015 | Apr 30, 2015 | MR | No | No | — | — | — | Resolved | Apr 30, 2015 | — | |
| Jul 1, 2013 | Jul 31, 2013 | MCL | Yes | No | — | 5% of samples | — | Resolved | Jul 31, 2013 | — | |
| Jul 1, 2013 | Jul 31, 2013 | MCL | Yes | No | — | 5% of samples | — | Resolved | Jul 31, 2013 | — | |
| Jul 1, 2013 | Jul 31, 2013 | MCL | Yes | No | — | 5% of samples | — | Resolved | Jul 31, 2013 | — | |
| Jul 1, 2013 | Jul 31, 2013 | MCL | Yes | No | — | 5% of samples | — | Resolved | Jul 31, 2013 | — | |
| May 1, 2004 | May 31, 2004 | TT | Yes | No | — | — | — | Resolved | May 31, 2004 | — | |
| May 1, 2004 | May 31, 2004 | TT | Yes | No | — | — | — | Resolved | May 31, 2004 | — | |
| May 1, 2004 | May 31, 2004 | TT | Yes | No | — | — | — | Resolved | May 31, 2004 | — | |
| May 1, 2004 | May 31, 2004 | TT | Yes | No | — | — | — | Resolved | May 31, 2004 | — | |
| Oct 1, 2003 | Oct 31, 2003 | TT | Yes | No | — | — | — | Resolved | Oct 31, 2003 | — | |
| Oct 1, 2003 | Oct 31, 2003 | TT | Yes | No | — | — | — | Resolved | Oct 31, 2003 | — | |
| Oct 1, 2003 | Oct 31, 2003 | TT | Yes | No | — | — | — | Resolved | Oct 31, 2003 | — | |
| Jul 1, 2002 | Sep 12, 2002 | Other | No | Yes | — | — | — | Resolved | Sep 12, 2002 | — | |
| Dec 1, 2001 | Dec 31, 2001 | MR | No | No | — | 5% of samples | — | Resolved | Dec 31, 2001 | — | |
| Dec 1, 2001 | Dec 31, 2001 | MR | No | No | — | 5% of samples | — | Resolved | Dec 31, 2001 | — | |
| — | — | — | No | No | — | — | — | — | — | — |
About This Water System
Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.