District of Columbia Water Systems
11 community water systems in District of Columbia, ranked by violation count. Data from EPA Safe Drinking Water Information System (SDWIS).
District of Columbia community water systems are regulated by the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act; each utility files compliance results with the state's primacy agency and, for federally listed contaminants, with the U.S. Environmental Protection Agency directly. PlainEnviro's health-based SDWIS extract above counts health-based exceedances only -- monitoring and reporting violations are not present in these figures.
Violation counts reflect both infrastructure realities and reporting diligence, a state with more small rural systems will accumulate more monitoring-type violations without necessarily delivering worse water. Health-based violations are the stronger safety signal. A past violation does not itself indicate current unsafe water; utilities must notify customers, remediate, and publish an annual Consumer Confidence Report. All numbers below draw directly from the federal SDWIS record.
Which water systems have violations? (7)
| # | System Name | Violations | Health |
|---|---|---|---|
| 1 | JOINT BASE ANACOSTIA - BOLLING Washington | 12 | Yes |
| 2 | NAVAL STATION WASHINGTON - WNY Washington Navy Yard | 8 | Yes |
| 3 | Dibe Yazhi Habitiin (Borrego Pass) Day School-BIE Washington | 7 | Yes |
| 4 | D.C. WATER AND SEWER AUTHORITY Washington | 5 | Yes |
| 5 | BIE CHEMAWA INDIAN SCHOOL Washington | 4 | Yes |
| 6 | Fort Wingate Community Washington | 1 | Yes |
| 7 | Eastern Navajo Agency - BIE Washington | 1 | Yes |
Systems with No Violations (4)
4 water systems in District of Columbia have zero recorded violations.
All Water Systems in District of Columbia (11)
Page 1 of 1, ordered by population served.
| System | Population Served | Violations |
|---|---|---|
| D.C. WATER AND SEWER AUTHORITY | 632,323 | 5 |
| JOINT BASE ANACOSTIA - BOLLING | 19,312 | 12 |
| NAVAL STATION WASHINGTON - WNY | 16,800 | 8 |
| Wingate Elementary School (New) - BIE | 800 | 0 |
| Fort Wingate Community | 550 | 1 |
| Eastern Navajo Agency - BIE | 455 | 1 |
| BIE CHEMAWA INDIAN SCHOOL | 320 | 4 |
| Chi Chil Tah Jones Ranch Community School - BIE | 137 | 0 |
| Dibe Yazhi Habitiin (Borrego Pass) Day School-BIE | 120 | 7 |
| Hanaadli Huerfano Boarding School - BIE | 65 | 0 |
| WASHINGTON AQUEDUCT DIVISION. | 0 | 0 |
Frequently Asked Questions
How many water systems are in District of Columbia?
How many water systems in District of Columbia have health violations?
How many health-based violation records are in this extract for District of Columbia?
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About This Data
Water system data is from the EPA Safe Drinking Water Information System (SDWIS). Health-based violations include Maximum Contaminant Level (MCL) and Treatment Technique (TT) violations that may pose a direct risk to public health. Only community water systems (CWS) are included.
Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.