Washington Water Quality
District of Columbia
According to EPA SDWIS, Washington, District of Columbia is served by 10 community water systems covering about 654,082 people. The same extract lists 30 health-based violation records, most recently coded 0200 in 2025. Counts are historical EPA registry rows, not a current compliance or drinkability score.
Drinking water in Washington, District of Columbia is delivered through 10 EPA-regulated community water systems serving an estimated 654,082 people. Each system is tracked in the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act, which requires testing for regulated contaminants, consumer notification of violations, and publication of an annual Consumer Confidence Report.
PlainEnviro's health-based SDWIS extract shows 30 violation records across the 10 active community systems shown here. Monitoring and reporting records are not present in the extract. The records carry 6 distinct EPA contaminant codes: Surface Water Treatment Rule, LEAD AND COPPER RULE REVISIONS, Revised Total Coliform Rule, Lead and Copper Rule, Coliform (TCR) and 1 others. 12 TRI-reporting industrial facilities are also located within the city limits.
A past EPA health-based registry row does not describe water delivered today or current compliance status; utilities notify customers and remediate under state primacy oversight when required. For current water-quality status and treatment practices, review your local utility's most recent Consumer Confidence Report or contact the District of Columbia drinking water program. All records above reflect federal EPA SDWIS data and are not independently verified against state databases.
Community Water Systems
| System Name | Pop. Served | Violations | Status |
|---|---|---|---|
| D.C. WATER AND SEWER AUTHORITY | 632,323 | 5 | Health |
| JOINT BASE ANACOSTIA - BOLLING | 19,312 | 12 | Health |
| Wingate Elementary School (New) - BIE | 800 | 0 | Clean |
| Fort Wingate Community | 550 | 1 | Health |
| Eastern Navajo Agency - BIE | 455 | 1 | Health |
| BIE CHEMAWA INDIAN SCHOOL | 320 | 4 | Health |
| Chi Chil Tah Jones Ranch Community School - BIE | 137 | 0 | Clean |
| Dibe Yazhi Habitiin (Borrego Pass) Day School-BIE | 120 | 7 | Health |
| Hanaadli Huerfano Boarding School - BIE | 65 | 0 | Clean |
| WASHINGTON AQUEDUCT DIVISION. | 0 | 0 | Clean |
Does this city have health-based water violations?
These health-based records can represent Maximum Contaminant Level (MCL), Treatment Technique (TT), or Maximum Residual Disinfectant Level (MRDL) categories. A historical record does not establish that water is currently unsafe.
| Water system | Contaminant | Begin Date |
|---|---|---|
| JOINT BASE ANACOSTIA - BOLLING | Surface Water Treatment Rule | 2025-09-01 |
| JOINT BASE ANACOSTIA - BOLLING | Surface Water Treatment Rule | 2025-09-01 |
| Fort Wingate Community | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| Eastern Navajo Agency - BIE | LEAD AND COPPER RULE REVISIONS | 2024-10-17 |
| Dibe Yazhi Habitiin (Borrego Pass) Day School-BIE | Revised Total Coliform Rule | 2024-09-05 |
| JOINT BASE ANACOSTIA - BOLLING | Surface Water Treatment Rule | 2022-10-01 |
| JOINT BASE ANACOSTIA - BOLLING | Surface Water Treatment Rule | 2022-10-01 |
| JOINT BASE ANACOSTIA - BOLLING | Surface Water Treatment Rule | 2021-01-01 |
| JOINT BASE ANACOSTIA - BOLLING | Surface Water Treatment Rule | 2021-01-01 |
| JOINT BASE ANACOSTIA - BOLLING | Surface Water Treatment Rule | 2019-07-01 |
| JOINT BASE ANACOSTIA - BOLLING | Surface Water Treatment Rule | 2019-07-01 |
| JOINT BASE ANACOSTIA - BOLLING | Surface Water Treatment Rule | 2018-12-01 |
| JOINT BASE ANACOSTIA - BOLLING | Surface Water Treatment Rule | 2018-12-01 |
| BIE CHEMAWA INDIAN SCHOOL | Lead and Copper Rule | 2018-07-01 |
| BIE CHEMAWA INDIAN SCHOOL | Lead and Copper Rule | 2018-07-01 |
| BIE CHEMAWA INDIAN SCHOOL | Lead and Copper Rule | 2018-07-01 |
| BIE CHEMAWA INDIAN SCHOOL | Lead and Copper Rule | 2018-07-01 |
| Dibe Yazhi Habitiin (Borrego Pass) Day School-BIE | Coliform (TCR) | 2015-09-01 |
| Dibe Yazhi Habitiin (Borrego Pass) Day School-BIE | Coliform (TCR) | 2015-09-01 |
| Dibe Yazhi Habitiin (Borrego Pass) Day School-BIE | Coliform (TCR) | 2015-08-01 |
| Dibe Yazhi Habitiin (Borrego Pass) Day School-BIE | Coliform (TCR) | 2015-08-01 |
| Dibe Yazhi Habitiin (Borrego Pass) Day School-BIE | Coliform (TCR) | 2015-07-01 |
| Dibe Yazhi Habitiin (Borrego Pass) Day School-BIE | Coliform (TCR) | 2015-07-01 |
| JOINT BASE ANACOSTIA - BOLLING | Long Term 2 Enhanced Surface Water Treatment Rule | 2012-03-31 |
| JOINT BASE ANACOSTIA - BOLLING | Long Term 2 Enhanced Surface Water Treatment Rule | 2010-11-19 |
| D.C. WATER AND SEWER AUTHORITY | Lead and Copper Rule | 2004-10-01 |
| D.C. WATER AND SEWER AUTHORITY | Lead and Copper Rule | 2002-10-01 |
| D.C. WATER AND SEWER AUTHORITY | Lead and Copper Rule | 2002-10-01 |
| D.C. WATER AND SEWER AUTHORITY | Lead and Copper Rule | 2001-07-01 |
| D.C. WATER AND SEWER AUTHORITY | Lead and Copper Rule | 2001-07-01 |
What are Washington's health-based records for?
Washington's health-based violation records carry 6 distinct EPA codes: some name a substance, others the drinking-water rule that was breached. Counts are records on file in the EPA SDWIS extract, not current test results.
| Contaminant | Records | Systems |
|---|---|---|
| Surface Water Treatment Rule | 10 | 1 |
| Lead and Copper Rule | 9 | 2 |
| Coliform (TCR) | 6 | 1 |
| Lead and Copper Rule Revisions | 2 | 2 |
| Long Term 2 Enhanced Surface Water Treatment Rule | 2 | 1 |
| Revised Total Coliform Rule | 1 | 1 |
TRI Facilities in Washington
| Facility | Total Releases |
|---|---|
| US Army Corps of Engineers McMillan WTP Washington Aqueduc | 73.2K lbs |
| Joint Base Anacostia Bolling Ranges | 6.0K lbs |
| Fort Totten Ready Mix Concrete | 4.9K lbs |
| US Army Corps of Engineers Dalecarlia WTP | 3.9K lbs |
| US Department of the Treasury-Bureau of Engraving & Printing | 1.7K lbs |
| Fort Myer Construction Plant 2 | 1.1K lbs |
| US Secret Service | 835 lbs |
| Fort Myer Construction Plant 1 | 410 lbs |
| US Naval Observatory | 26 lbs |
| Superior Concrete Materials Inc. - Washington | 1 lbs |
Frequently Asked Questions
What does EPA SDWIS list for drinking water in Washington, District of Columbia? ▼
How many water violations does Washington have in this EPA extract? ▼
What contaminants were found in Washington water? ▼
How many water systems serve Washington? ▼
Where does Washington get its drinking water? ▼
Are there pollution sources near Washington? ▼
How does Washington compare in District of Columbia?
Of the 2 District of Columbia places with at least one community water system on file, Washington ranks #1 by number of systems (10).
Either side of it: Washington Navy Yard (1)
About This Data
Figures here are the current EPA SDWIS extract joined to the 10 community water systems whose service area lists Washington, ranked against the 2 District of Columbia places with at least one system on file. Data current as of 2026-08-25.
Water system data comes from the EPA's Safe Drinking Water Information System (SDWIS). PlainEnviro's violation fetch is restricted upstream to records EPA flags as health-based and then joined to active community water systems. Monitoring and reporting violations are not included.
A health-based violation row in this extract is a historical EPA registry entry. It does not describe water delivered today or current compliance status. Many records are later resolved, and public water systems notify customers when required. For current conditions, contact your local water utility or the state drinking water program.
TRI facility data comes from the EPA Toxic Release Inventory. Facilities shown are those that self-report to the TRI program. PlainEnviro presents this data without advocacy framing.
Read our methodology - how this data is sourced, computed, and verified.