Public water system · VA6059501
ActiveFairfax County Water Authority
At a glance
Fairfax County Water Authority (PWSID VA6059501) is an active community water system in Fairfax County, Virginia. It reports serving 1,121,613 people through 281,686 service connections. Its primary water source is surface water, and EPA lists it as owned by a local government. EPA's Safe Drinking Water Act records list no violations for this system.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,121,613
Service connections
281,686
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does Fairfax County Water Authority compare with other water systems in Fairfax County?
By EPA's size categories, Fairfax County Water Authority is a very large system (more than 100,000 people). Fairfax County has 43 active public water systems, and Fairfax County Water Authority is the largest of them by population served. Its population served is about 37 times the county average of 30,570 people per system, and accounts for 85% of the 1,314,517 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 Fairfax County Water Authority is about 167 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. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 110 Virginia systems (4.5%) list surface water as their primary source.
Who owns and regulates Fairfax County Water Authority?
EPA lists Fairfax County Water Authority 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. 20 of the 43 active systems in Fairfax County (47%) are also owned by a local government.
Does Fairfax County Water Authority have drinking water violations?
No SDWA violations on record.
EPA's SDWA violation and enforcement data (via EPA ECHO, updated quarterly) lists no violations for Fairfax County Water Authority. For the latest compliance status, check EPA ECHO for current compliance history.
Fairfax County Water Authority: frequently asked questions
Who runs Fairfax County Water Authority?
Fairfax County Water Authority (PWSID VA6059501) is a community water system owned by a local government. It is regulated by the VA state drinking water program.
How many people does Fairfax County Water Authority serve?
Fairfax County Water Authority reports serving 1,121,613 people through 281,686 service connections in Fairfax County, Virginia.
Where does Fairfax County Water Authority get its water?
EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.
Does Fairfax County Water Authority have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Fairfax County Water Authority'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 Safe Drinking Water Act records list no violations for this system. For current results, consult the system's annual water quality report, EPA ECHO, or the VA state drinking water program.
Where can I find Fairfax County Water Authority's water quality report?
As a community water system, Fairfax County Water Authority 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 Fairfax County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Dulles Airport | Fairfax | 76,500 | Non-transient non-community | Purchased surface water |
| Fort Belvoir | Fairfax | 39,303 | Community | Purchased surface water |
| Vienna, Town of | Fairfax | 27,134 | Community | Purchased surface water |
| Herndon, Town of | Fairfax | 24,601 | Community | Purchased surface water |
| Fort Belvoir North Area | Fairfax | 11,822 | Non-transient non-community | Purchased surface water |
| Mount Vernon | Fairfax | 3,000 | Non-transient non-community | Groundwater |
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, “Fairfax County Water Authority, PWSID VA6059501, Virginia”, https://aquacensus.com/water-systems/virginia/fairfax-county-water-authority-va6059501 (data as of October 1, 2026).