Public water system · VA6013010
ActiveArlington County
At a glance
Arlington County (PWSID VA6013010) is an active community water system in Arlington County, Virginia. It reports serving 215,000 people through 37,076 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. EPA's records list 4 violations for this system; 2 are health-based, and the most recent began in October 2007.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
215,000
Service connections
37,076
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Arlington County compare with other water systems in Arlington County?
By EPA's size categories, Arlington County is a very large system (more than 100,000 people). Arlington County has 3 active public water systems, and Arlington County is the largest of them by population served. Its population served is about 198% above the county average of 72,231 people per system, and accounts for 99% of the 216,692 people reported by systems filed under the county. Across Virginia, the 2,420 active systems average 3,122 people each. Nationally, the average active community water system reports serving 6,703 people, so Arlington County is about 32 times 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. Virginia has 844 active community water systems, 35% of the state's 2,420 active systems. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 162 Virginia systems (6.7%) list purchased surface water as their primary source.
Who owns and regulates Arlington County?
EPA lists Arlington County as owned by a local government. The VA state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 2 of the 3 active systems in Arlington County (67%) are also owned by a local government.
Does Arlington County have drinking water violations?
EPA's records list 4 violations for this system; 2 are health-based, and the most recent began in October 2007. The violations listed here began between July 1993 and October 2007. By type: 2 monitoring and reporting and 2 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (3 of them). EPA lists 2 as resolved and 2 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 |
|---|---|---|---|---|
| 2007-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2007-10-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1994-06-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Acute (TCR) · code 21 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1993-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
All 4 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.
Arlington County: frequently asked questions
Who runs Arlington County?
Arlington County (PWSID VA6013010) is a community water system owned by a local government. It is regulated by the VA state drinking water program.
How many people does Arlington County serve?
Arlington County reports serving 215,000 people through 37,076 service connections in Arlington County, Virginia.
Where does Arlington County 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 Arlington County have any drinking water violations?
EPA's records list 4 violations for this system; 2 are health-based, and the most recent began in October 2007. 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 Arlington County'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. EPA's records list 4 violations for this system; 2 are health-based, and the most recent began in October 2007. For current results, consult the system's annual water quality report, EPA ECHO, or the VA state drinking water program.
Where can I find Arlington County's water quality report?
As a community water system, Arlington County 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 Arlington County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Arlington County - Willston Area | Arlington | 1,352 | Community | Purchased surface water |
| Virginia Hospital Center | Arlington | 340 | Non-transient non-community | Purchased surface water |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “Arlington County, PWSID VA6013010, Virginia”, https://aquacensus.com/water-systems/virginia/arlington-county-va6013010 (data as of October 1, 2026).