Pennsylvania Tap Water Quality
Explore tap water quality data for counties across Pennsylvania. View water system reports, track violations, monitor drinking water safety, and check fluoridation status in your community.
Total Counties
67
Communities with public water systems
Total Population
11,467,561
Residents served by public water systems
Water Systems
1,876
Public water systems statewide
Serious Violators
44
Systems with serious violations
Counties
67
With water systems
Population
11,467,561
Served by water systems
Water Systems
1,876
Total water systems
Violators
44
Systems with serious violations
Searching by your address yields the most accurate results. Searching by town or water system may not show all systems due to how the EPA categorizes data. Some towns may be listed under counties, and water system boundaries don't always align with town boundaries.
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Pennsylvania Counties
Adams
Population: 48,376
Water Systems: 37
Allegheny
Population: 1,946,180
Water Systems: 40
Armstrong
Population: 45,364
Water Systems: 22
Beaver
Population: 165,245
Water Systems: 30
Bedford
Population: 18,774
Water Systems: 25
Berks
Population: 292,686
Water Systems: 77
Blair
Population: 99,620
Water Systems: 25
Bradford
Population: 29,583
Water Systems: 22
Bucks
Population: 554,395
Water Systems: 70
Butler
Population: 137,967
Water Systems: 43
Cambria
Population: 137,098
Water Systems: 36
Cameron
Population: 3,558
Water Systems: 2
Carbon
Population: 44,365
Water Systems: 29
Centre
Population: 177,181
Water Systems: 43
Chester
Population: 259,136
Water Systems: 70
Clarion
Population: 31,463
Water Systems: 16
Clearfield
Population: 55,758
Water Systems: 18
Clinton
Population: 29,673
Water Systems: 18
Columbia
Population: 52,942
Water Systems: 21
Crawford
Population: 40,297
Water Systems: 44
Cumberland
Population: 230,991
Water Systems: 27
Dauphin
Population: 263,071
Water Systems: 28
Delaware
Population: 148,535
Water Systems: 5
Elk
Population: 30,817
Water Systems: 9
Erie
Population: 288,468
Water Systems: 41
Fayette
Population: 261,483
Water Systems: 19
Forest
Population: 5,380
Water Systems: 3
Franklin
Population: 111,924
Water Systems: 30
Fulton
Population: 2,411
Water Systems: 4
Greene
Population: 45,900
Water Systems: 4
Huntingdon
Population: 31,692
Water Systems: 21
Indiana
Population: 48,451
Water Systems: 17
Jefferson
Population: 27,556
Water Systems: 11
Juniata
Population: 9,626
Water Systems: 13
Lackawanna
Population: 157,285
Water Systems: 33
Lancaster
Population: 337,427
Water Systems: 98
Lawrence
Population: 69,154
Water Systems: 18
Lebanon
Population: 84,839
Water Systems: 30
Lehigh
Population: 258,637
Water Systems: 42
Luzerne
Population: 273,054
Water Systems: 77
Lycoming
Population: 78,824
Water Systems: 32
Mckean
Population: 33,889
Water Systems: 17
Mercer
Population: 85,609
Water Systems: 33
Mifflin
Population: 28,285
Water Systems: 7
Monroe
Population: 93,188
Water Systems: 67
Montgomery
Population: 1,234,574
Water Systems: 39
Montour
Population: 5,242
Water Systems: 3
Northampton
Population: 314,700
Water Systems: 46
Northumberland
Population: 86,490
Water Systems: 11
Perry
Population: 11,459
Water Systems: 25
Philadelphia
Population: 1,600,000
Water Systems: 1
Pike
Population: 41,969
Water Systems: 43
Potter
Population: 9,501
Water Systems: 9
Schuylkill
Population: 117,589
Water Systems: 39
Snyder
Population: 19,506
Water Systems: 16
Somerset
Population: 54,853
Water Systems: 34
Sullivan
Population: 1,250
Water Systems: 4
Susquehanna
Population: 12,781
Water Systems: 23
Tioga
Population: 25,177
Water Systems: 22
Union
Population: 5,702
Water Systems: 6
Venango
Population: 36,960
Water Systems: 25
Warren
Population: 23,697
Water Systems: 15
Washington
Population: 43,721
Water Systems: 9
Wayne
Population: 24,238
Water Systems: 40
Westmoreland
Population: 254,411
Water Systems: 16
Wyoming
Population: 15,878
Water Systems: 30
York
Population: 351,706
Water Systems: 46