Public water system · DC0000003
ActiveNaval Station Washington - Wny
At a glance
Naval Station Washington - Wny (PWSID DC0000003) is an active community water system in District of Columbia County, District of Columbia. It reports serving 16,800 people through 90 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by the federal government. Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in November 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
16,800
Service connections
90
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Naval Station Washington - Wny compare with other water systems in District of Columbia County?
By EPA's size categories, Naval Station Washington - Wny is a large system (10,001 to 100,000 people). District of Columbia County has 5 active public water systems, and Naval Station Washington - Wny is the 3rd-largest of them by population served. Its population served is well below the county average of 133,737 people per system, and accounts for 2.5% of the 668,685 people reported by systems filed under the county. Across District of Columbia, the 12 active systems average 58,113 people each. Nationally, the average active community water system reports serving 6,703 people, so Naval Station Washington - Wny is about 151% above that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. District of Columbia has 4 active community water systems, 33% of the state's 12 active systems. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 5 District of Columbia systems (42%) list purchased surface water as their primary source.
Who owns and regulates Naval Station Washington - Wny?
EPA lists Naval Station Washington - Wny as owned by the federal government. The DC state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 4 of the 5 active systems in District of Columbia County (80%) are also owned by the federal government.
Does Naval Station Washington - Wny have drinking water violations?
Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in November 2025. The violations listed here began between April 2019 and November 2025. By type: 3 monitoring and reporting, 3 public notice, recordkeeping or other, 2 contaminant level above the legal limit, 2 reporting, 1 monitoring and 1 required treatment not met. The contaminant or rule involved most often is Total trihalomethanes (TTHM) (4 of them). EPA lists 11 as resolved and 1 as archived. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2025-11-17 | Monitoring and reportingFailure Submit IDSE/Subpart V Plan Rpt · code 35 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2025-09-18 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2025-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2025-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2025-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2025-02-11 | ReportingReport Sample Result/Fail Monitor (RTCR) · code 4B | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2023-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2023-04-01 | MonitoringMonitoring, Additional Routine (RTCR) · code 3B | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2023-01-01 | Required treatment not metTreatment Technique, Level 1 Assessment (RTCR) · code 2A | Revised Total Coliform Rulecode 8000 | Yes | Resolved |
| 2023-01-01 | ReportingReporting, Assessment Forms (RTCR) · code 4A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2019-04-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2019-04-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Archived |
The 12 most recent violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Naval Station Washington - Wny: frequently asked questions
Who runs Naval Station Washington - Wny?
Naval Station Washington - Wny (PWSID DC0000003) is a community water system owned by the federal government. It is regulated by the DC state drinking water program.
How many people does Naval Station Washington - Wny serve?
Naval Station Washington - Wny reports serving 16,800 people through 90 service connections in District of Columbia County, District of Columbia.
Where does Naval Station Washington - Wny get its water?
EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.
Does Naval Station Washington - Wny have any drinking water violations?
Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in November 2025. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Naval Station Washington - Wny's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in November 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the DC state drinking water program.
Where can I find Naval Station Washington - Wny's water quality report?
As a community water system, Naval Station Washington - Wny must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in District of Columbia County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| D.C. Water and Sewer Authority | District of Columbia | 632,323 | Community | Purchased surface water |
| Joint Base Anacostia - Bolling | District of Columbia | 19,312 | Community | Purchased surface water |
| Naval Observatory | District of Columbia | 250 | Non-transient non-community | Purchased surface water |
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Naval Station Washington - Wny, PWSID DC0000003, District of Columbia”, https://aquacensus.com/water-systems/district-of-columbia/naval-station-washington-wny-dc0000003 (data as of October 1, 2026).