District of Columbia Water Systems
12 community water systems in District of Columbia, ranked by violation count. Data from EPA Safe Drinking Water Information System (SDWIS).
District of Columbia operates 12 community water systems regulated by the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act. Together these utilities serve an estimated 670,567 residents, each filing compliance results with the state's primacy agency and, for federally listed contaminants, with the U.S. Environmental Protection Agency.
Across the state, SDWIS records contain 51 total violations, of which 9 systems carry at least one active health-based violation, a Maximum Contaminant Level (MCL) exceedance or treatment-technique failure. That represents roughly 75% of District of Columbia systems.
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? (9)
| # | System Name | Violations | Health |
|---|---|---|---|
| 1 | PASCHAL SHERMAN INDIAN SCHOOL Washington | 14 | Yes |
| 2 | JOINT BASE ANACOSTIA - BOLLING Washington | 11 | Yes |
| 3 | Dibe Yazhi Habitiin (Borrego Pass) Day School-BIE Washington | 7 | Yes |
| 4 | NAVAL STATION WASHINGTON - WNY Washington | 6 | Yes |
| 5 | D.C. WATER AND SEWER AUTHORITY Washington | 5 | Yes |
| 6 | BIE CHEMAWA INDIAN SCHOOL Washington | 3 | Yes |
| 7 | Lake Valley Navajo School - BIE Washington | 3 | Yes |
| 8 | Fort Wingate Community Washington | 1 | Yes |
| 9 | Eastern Navajo Agency - BIE Washington | 1 | Yes |
Systems with No Violations (3)
3 water systems in District of Columbia have zero recorded violations.
All Water Systems in District of Columbia (12)
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 | 11 |
| NAVAL STATION WASHINGTON - WNY | 15,690 | 6 |
| BIE CHEMAWA INDIAN SCHOOL | 900 | 3 |
| Wingate Elementary School (New) - BIE | 800 | 0 |
| Fort Wingate Community | 550 | 1 |
| Eastern Navajo Agency - BIE | 455 | 1 |
| PASCHAL SHERMAN INDIAN SCHOOL | 220 | 14 |
| Chi Chil Tah Jones Ranch Community School - BIE | 137 | 0 |
| Dibe Yazhi Habitiin (Borrego Pass) Day School-BIE | 120 | 7 |
| Lake Valley Navajo School - BIE | 60 | 3 |
| WASHINGTON AQUEDUCT DIVISION. | 0 | 0 |
Frequently Asked Questions
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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 U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.