Arlington County, Virginia — public water systems
At a glance
3 active public water systems are filed under Arlington County, Virginia in EPA's SDWIS records, together reporting 216,692 people served. The largest is Arlington County, which reports serving 215,000 people. 2 are community water systems serving people where they live; the other 1 are non-community systems, such as schools, workplaces, campgrounds and gas stations with their own supply.
Dataset updated . Source: EPA SDWIS/ECHO, refreshed quarterly.
Active systems
3
Population served
216.7K
Community systems
2
Groundwater share
0%
How does Arlington County compare with other Virginia counties?
Arlington County has the 99th-most active public water systems among the 138 counties listed for active Virginia systems in EPA records; among the 99 with 3 or more systems, the median has 20. Its systems report 216,692 people served in total, the 6th-largest county figure in the state and 2.9% of the statewide total. The average system here reports serving 72,231 people, about 23 times the Virginia average of 3,122. Population figures are what each system reports; people served by more than one system, such as a wholesaler and the town that buys from it, are counted by each.
Where does Arlington County's drinking water come from?
By primary water source, Arlington County's active systems draw on purchased surface water (3, 100%). Overall, none rely mainly on groundwater (including purchased groundwater) and all on surface water, compared with 89% and 11% across Virginia. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. The county's largest system, Arlington County, draws primarily on purchased surface water.
What kinds of water systems operate in Arlington County?
Arlington County's active systems break down as 2 community systems (67%) and 1 non-transient non-community systems (33%). 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. A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. EPA lists their owner types as local government (67%) and private (33%).
Water systems in Arlington County
🔒 Create a free account to export CSV| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | Arlington County | Arlington | 215,000 | Community | Purchased surface water |
| 2 | Arlington County - Willston Area | Arlington | 1,352 | Community | Purchased surface water |
| 3 | Virginia Hospital Center | Arlington | 340 | Non-transient non-community | Purchased surface water |
Arlington County water systems: frequently asked questions
How many public water systems are in Arlington County, Virginia?
EPA's SDWIS records file 3 active public water systems under Arlington County, Virginia: 2 community systems (67%) and 1 non-transient non-community systems (33%).
Who supplies drinking water in Arlington County, VA?
The largest community water systems filed under Arlington County are Arlington County (215,000 people served) and Arlington County - Willston Area (1,352 people served). Which system serves a particular address depends on its service area, which EPA's SDWIS records do not include; a water bill or the local utility can confirm it.
Does Arlington County's drinking water come from groundwater or surface water?
Of the 3 active public water systems in Arlington County, none draw mainly on groundwater and all on surface water, counting purchased supplies. The largest system, Arlington County, uses purchased surface water.
Where can I find a water quality report for Arlington County?
Each community water system must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1, covering the previous calendar year. 2 community systems are filed under Arlington County, so the report to look for is the one from the system that supplies your address.
How can I check violations for a water system in Arlington County?
Open the system's profile from the list on this page. Each profile shows the most recent Safe Drinking Water Act violations in EPA's records, with plain-English labels and whether each one is resolved. For current compliance status, EPA ECHO is the primary source.
More Virginia water systems
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, “Public water systems in Arlington County, Virginia”, https://aquacensus.com/water-systems/virginia/arlington (data as of October 1, 2026).