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Prince William County, Virginia — public water systems

At a glance

36 active public water systems are filed under Prince William County, Virginia in EPA's SDWIS records, together reporting 414,096 people served. The largest is Pwcsa - East, which reports serving 168,747 people. 10 are community water systems serving people where they live; the other 26 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

36

Population served

414.1K

Community systems

10

Groundwater share

80.6%

How does Prince William County compare with other Virginia counties?

Prince William County has the 19th-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 414,096 people served in total, the 3rd-largest county figure in the state and 5.5% of the statewide total. The average system here reports serving 11,503 people, about 3.7 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 Prince William County's drinking water come from?

By primary water source, Prince William County's active systems draw on groundwater (29, 81%), purchased surface water (6, 17%) and surface water (1, 2.8%). Overall, 81% rely mainly on groundwater (including purchased groundwater) and 19% on surface water, compared with 89% and 11% across Virginia. Groundwater means the system draws its water from wells or springs fed by underground aquifers. The county's largest system, Pwcsa - East, draws primarily on purchased surface water.

What kinds of water systems operate in Prince William County?

Prince William County's active systems break down as 10 community systems (28%), 8 non-transient non-community systems (22%) and 18 transient non-community systems (50%). 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. A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. EPA lists their owner types as private (56%), local government (33%) and federal government (11%).

Water systems in Prince William County

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Active public water systems in Prince William County, Virginia
#Water systemCountyPopulation servedTypeSource
1Pwcsa - EastPrince William168,747CommunityPurchased surface water
2Pwcsa - WestPrince William136,409CommunityPurchased surface water
3Dale CityPrince William72,062CommunityPurchased surface water
4Mcb Quantico - MainsidePrince William19,000CommunitySurface water
5Quantico Mcb-Camp BarrettPrince William8,689CommunityPurchased surface water
6Bull Run Mountain/Evergreen (Brme)Prince William1,803CommunityGroundwater
7Brentsville High SchoolPrince William1,600Non-transient non-communityGroundwater
8The Nokesville SchoolPrince William867Non-transient non-communityGroundwater
9Quantico, Town ofPrince William650CommunityPurchased surface water
10Quantico Mcb-Camp UpshurPrince William625Non-transient non-communityGroundwater
11Bull Run Golf ClubPrince William420Transient non-communityGroundwater
12Blue Ridge SeafoodPrince William370Transient non-communityGroundwater
13Linton Hall SchoolPrince William350CommunityGroundwater
14Woodbridge MHP LLCPrince William320CommunityGroundwater
15Nokesville Mini LibraryPrince William250Transient non-communityGroundwater
16Bristow Manor Golf ClubPrince William219Transient non-communityGroundwater
17Pwcsa - Hoadly ManorPrince William207CommunityPurchased surface water
18Holy Family AcademyPrince William170Non-transient non-communityGroundwater
19Public Safety Training Ctr.Prince William150Non-transient non-communityGroundwater
20Buckhall VfdPrince William150Transient non-communityGroundwater
21Greenville Farm CampgroundPrince William125Transient non-communityGroundwater
22Nokesville SquarePrince William120Transient non-communityGroundwater
23Renaissance MontessoriPrince William120Non-transient non-communityGroundwater
24Independent Hill LibraryPrince William100Transient non-communityGroundwater
25Winery at Sunshine Ridge FarmPrince William80Transient non-communityGroundwater
26Fairfax Rod & Gun ClubPrince William75Transient non-communityGroundwater
27Nokesville Church of the BrethrenPrince William68Non-transient non-communityGroundwater
28Transportation Area (Pr.Wm.Co. Schools)Prince William63Non-transient non-communityGroundwater
29Farm Brewery at Broad RunPrince William56Transient non-communityGroundwater
30Camp SnyderPrince William50Transient non-communityGroundwater
31Greenwich Presbyterian PreschoolPrince William44Transient non-communityGroundwater
32Nokesville Family DentistryPrince William33Transient non-communityGroundwater
33Effingham WineryPrince William28Transient non-communityGroundwater
34Rainbow Riding CenterPrince William26Transient non-communityGroundwater
35Brawner FarmPrince William25Transient non-communityGroundwater
36Hector`S of NokesvillePrince William25Transient non-communityGroundwater

Prince William County water systems: frequently asked questions

How many public water systems are in Prince William County, Virginia?

EPA's SDWIS records file 36 active public water systems under Prince William County, Virginia: 10 community systems (28%), 8 non-transient non-community systems (22%) and 18 transient non-community systems (50%).

Who supplies drinking water in Prince William County, VA?

The largest community water systems filed under Prince William County are Pwcsa - East (168,747 people served), Pwcsa - West (136,409 people served) and Dale City (72,062 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 Prince William County's drinking water come from groundwater or surface water?

Of the 36 active public water systems in Prince William County, 81% draw mainly on groundwater and 19% on surface water, counting purchased supplies. The largest system, Pwcsa - East, uses purchased surface water.

Where can I find a water quality report for Prince William 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. 10 community systems are filed under Prince William 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 Prince William 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 Prince William County, Virginia”, https://aquacensus.com/water-systems/virginia/prince-william (data as of October 1, 2026).