D.C. WATER AND SEWER AUTHORITY
Washington D.C. - Community Water System - PWSID: DC0000002
System Information
| PWSID | DC0000002 |
| System Name | D.C. WATER AND SEWER AUTHORITY |
| System Type | Community Water System |
| Water Source | Surface Water Purchased |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 03 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Mar 1, 1979 |
| Last Reported | Feb 25, 2026 |
Location & Contact
| State | Washington D.C. |
| City | WASHINGTON |
| ZIP Code | 20016 |
| Address | 3900 Donaldson Pl., NW |
| Organization | SCHMELLING, MAUREEN |
| Phone | 202-364-3131 |
Population & Service
| Population Served | 632,323 |
| Service Connections | 133,500 |
Drinking Water Violations (82)
This water system has 82 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan 1, 2023 | Jan 31, 2023 | MON | No | Yes | - | - | - | Resolved | Jan 31, 2023 | - | |
| Jan 1, 2023 | Jan 31, 2023 | MR | No | Yes | - | - | - | Resolved | Jan 31, 2023 | - | |
| Jan 1, 2023 | Jan 31, 2023 | MR | No | Yes | - | - | - | Resolved | Jan 31, 2023 | - | |
| Jan 1, 2023 | Jan 31, 2023 | MON | No | Yes | - | - | - | Resolved | Jan 31, 2023 | - | |
| Jan 1, 2023 | Jan 31, 2023 | MON | No | Yes | - | - | - | Resolved | Jan 31, 2023 | - | |
| Jan 1, 2023 | Jan 31, 2023 | MR | No | Yes | - | - | - | Resolved | Jan 31, 2023 | - | |
| Dec 1, 2022 | Dec 31, 2022 | MON | No | Yes | - | - | - | Resolved | Dec 31, 2022 | - | |
| Dec 1, 2022 | Dec 31, 2022 | MON | No | Yes | - | - | - | Resolved | Dec 31, 2022 | - | |
| Dec 1, 2022 | Dec 31, 2022 | MR | No | Yes | - | - | - | Resolved | Dec 31, 2022 | - | |
| Dec 1, 2022 | Dec 31, 2022 | MR | No | Yes | - | - | - | Resolved | Dec 31, 2022 | - | |
| Dec 1, 2022 | Dec 31, 2022 | MR | No | Yes | - | - | - | Resolved | Dec 31, 2022 | - | |
| Dec 1, 2022 | Dec 31, 2022 | MON | No | Yes | - | - | - | Resolved | Dec 31, 2022 | - | |
| Jan 1, 2006 | Mar 31, 2006 | MR | No | No | - | 4.0 mg/L | - | Resolved | Feb 2, 2006 | - | |
| Jan 1, 2006 | Mar 31, 2006 | MR | No | No | - | 4.0 mg/L | - | Resolved | Feb 2, 2006 | - | |
| Jul 1, 2005 | - | Other | No | No | - | - | - | Resolved | Jul 11, 2005 | - | |
| Oct 1, 2004 | Dec 31, 2004 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Oct 1, 2004 | Dec 31, 2004 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Oct 1, 2004 | - | TT | Yes | No | - | TT | - | Resolved | Mar 15, 2006 | - | |
| Oct 1, 2004 | Dec 31, 2004 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Oct 1, 2004 | Dec 31, 2004 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Oct 1, 2004 | - | TT | Yes | No | - | TT | - | Resolved | Mar 15, 2006 | - | |
| Sep 1, 2004 | Sep 30, 2004 | MCL | Yes | No | - | 5% of samples | - | Resolved | Sep 30, 2004 | - | |
| Oct 1, 2003 | - | Other | No | No | - | - | - | Resolved | May 15, 2007 | - | |
| Oct 1, 2003 | - | Other | No | No | - | - | - | Resolved | May 15, 2007 | - | |
| Oct 1, 2003 | - | Other | No | No | - | - | - | Resolved | May 15, 2007 | - | |
| Jul 1, 2003 | - | MR | No | No | - | TT | - | Resolved | May 15, 2007 | - | |
| Jul 1, 2003 | - | MR | No | No | - | TT | - | Resolved | May 15, 2007 | - | |
| Jul 1, 2003 | - | MR | No | No | - | TT | - | Resolved | May 15, 2007 | - | |
| Jan 1, 2003 | - | MR | No | No | - | TT | - | Resolved | May 15, 2007 | - | |
| Jan 1, 2003 | - | MR | No | No | - | TT | - | Resolved | May 15, 2007 | - | |
| Jan 1, 2003 | - | MR | No | No | - | TT | - | Resolved | May 15, 2007 | - | |
| Oct 1, 2002 | - | TT | Yes | No | - | TT | - | Resolved | Oct 3, 2005 | - | |
| Oct 1, 2002 | - | TT | Yes | No | - | TT | - | Resolved | Nov 18, 2005 | - | |
| Oct 1, 2002 | - | TT | Yes | No | - | TT | - | Resolved | Nov 18, 2005 | - | |
| Oct 1, 2002 | - | TT | Yes | No | - | TT | - | Resolved | Oct 3, 2005 | - | |
| Jul 1, 2001 | - | TT | Yes | No | - | TT | - | Resolved | Oct 3, 2005 | - | |
| Jul 1, 2001 | - | TT | Yes | No | - | TT | - | Resolved | Nov 19, 2005 | - | |
| Jul 1, 2001 | - | TT | Yes | No | - | TT | - | Resolved | Nov 19, 2005 | - | |
| Jul 1, 2001 | - | TT | Yes | No | - | TT | - | Resolved | Oct 3, 2005 | - | |
| Jul 1, 2001 | - | MR | No | No | - | TT | - | Resolved | May 15, 2007 | - | |
| Jul 1, 2001 | - | MR | No | No | - | TT | - | Resolved | May 15, 2007 | - | |
| Jul 1, 2001 | - | MR | No | No | - | TT | - | Resolved | May 15, 2007 | - | |
| Jul 1, 2000 | - | MR | No | No | - | TT | - | Resolved | May 15, 2007 | - | |
| Jul 1, 2000 | - | MR | No | No | - | TT | - | Resolved | May 15, 2007 | - | |
| Jul 1, 2000 | - | MR | No | No | - | TT | - | Resolved | May 15, 2007 | - | |
| Jul 1, 1999 | - | MR | No | No | - | TT | - | Resolved | May 15, 2007 | - | |
| Jul 1, 1999 | - | MR | No | No | - | TT | - | Resolved | May 15, 2007 | - | |
| Jul 1, 1999 | - | MR | No | No | - | TT | - | Resolved | May 15, 2007 | - | |
| Jan 1, 1999 | - | MR | No | No | - | TT | - | Resolved | May 15, 2007 | - | |
| Jan 1, 1999 | - | MR | No | No | - | TT | - | Resolved | May 15, 2007 | - |
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.