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Washington County, Pennsylvania — public water systems

At a glance

26 active public water systems are filed under Washington County, Pennsylvania in EPA's SDWIS records, together reporting 45,508 people served. The largest is Auth of Boro of Charleroi, which reports serving 27,000 people. 7 are community water systems serving people where they live; the other 19 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

26

Population served

45.5K

Community systems

7

Groundwater share

61.5%

How does Washington County compare with other Pennsylvania counties?

Washington County has the 60th-most active public water systems among the 99 counties listed for active Pennsylvania systems in EPA records; among the 71 with 3 or more systems, the median has 76. Its systems report 45,508 people served in total, the 43rd-largest county figure in the state and 0.4% of the statewide total. The average system here reports serving 1,750 people, roughly in line with the Pennsylvania average of 1,741. 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 Washington County's drinking water come from?

By primary water source, Washington County's active systems draw on groundwater (16, 62%), purchased surface water (7, 27%) and surface water (3, 12%). Overall, 62% rely mainly on groundwater (including purchased groundwater) and 38% on surface water, compared with 93% and 6.8% across Pennsylvania. Groundwater means the system draws its water from wells or springs fed by underground aquifers. The county's largest system, Auth of Boro of Charleroi, draws primarily on surface water.

What kinds of water systems operate in Washington County?

Washington County's active systems break down as 7 community systems (27%), 2 non-transient non-community systems (7.7%) and 17 transient non-community systems (65%). 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 (50%), local government (31%) and public/private partnership (19%).

Water systems in Washington County

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Active public water systems in Washington County, Pennsylvania
#Water systemCountyPopulation servedTypeSource
1Auth of Boro of CharleroiWashington27,000CommunitySurface water
2Tri Cnty Jt Muni AuthWashington10,100CommunitySurface water
3Bentleyville Muni AuthWashington2,600CommunityPurchased surface water
4Ellsworth Boro Water DeptWashington1,250CommunityPurchased surface water
5Sheetz Inc. #209Washington911Transient non-communityGroundwater
6Avella Area School DistrictWashington850Non-transient non-communityGroundwater
7Donegal TownshipWashington820CommunityPurchased surface water
8Marianna Muni Water WorksWashington480CommunityPurchased surface water
9American Bulk Hauling LLCWashington435Transient non-communityPurchased surface water
10Four Seasons ResortWashington100Transient non-communitySurface water
11Lone Pine Stop #1Washington100Transient non-communityGroundwater
12Dogwood Hills Golf CourseWashington100Transient non-communityGroundwater
13Cornerstone CareWashington100Non-transient non-communityGroundwater
14Lone Pine Community CenterWashington100Transient non-communityGroundwater
15Bullpen Rustic LodgeWashington100Transient non-communityGroundwater
16Deer Lodge Mobile Home ParkWashington87CommunityGroundwater
17Mouse TrapWashington50Transient non-communityGroundwater
18Camp AgapeWashington50Transient non-communityGroundwater
19Tc USA Pipeline Services LLCWashington50Transient non-communityGroundwater
20Rough Cut TavernWashington50Transient non-communityGroundwater
21Canonsburg Sportsmen AssociatnWashington50Transient non-communityGroundwater
22West Pike Bulk StationWashington25Transient non-communityPurchased surface water
23Houston SunocoWashington25Transient non-communityGroundwater
24Bsa Camp AnnawannaWashington25Transient non-communityGroundwater
25American Legion Post 907Washington25Transient non-communityGroundwater
26Dean'S Water Service, Inc..Washington25Transient non-communityPurchased surface water

Washington County water systems: frequently asked questions

How many public water systems are in Washington County, Pennsylvania?

EPA's SDWIS records file 26 active public water systems under Washington County, Pennsylvania: 7 community systems (27%), 2 non-transient non-community systems (7.7%) and 17 transient non-community systems (65%).

Who supplies drinking water in Washington County, PA?

The largest community water systems filed under Washington County are Auth of Boro of Charleroi (27,000 people served), Tri Cnty Jt Muni Auth (10,100 people served) and Bentleyville Muni Auth (2,600 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 Washington County's drinking water come from groundwater or surface water?

Of the 26 active public water systems in Washington County, 62% draw mainly on groundwater and 38% on surface water, counting purchased supplies. The largest system, Auth of Boro of Charleroi, uses surface water.

Where can I find a water quality report for Washington 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. 7 community systems are filed under Washington 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 Washington 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 Pennsylvania 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 Washington County, Pennsylvania”, https://aquacensus.com/water-systems/pennsylvania/washington (data as of October 1, 2026).