PlainWater

Public Water Systems

7,701 active public water systems in PA, tracked from EPA's Safe Drinking Water Information System (SDWIS) across all 50 states. See our methodology.

Population Violations Health Violations Name
System Name Location Population Violations PFAS
Philadelphia Water Department Philadelphia, PA 1,600,000 130 Detected
Aqua PA Main System Bryn Mawr, PA 822,600 453 Detected
PA Amer Water Co-Pittsburgh McMurray, PA 686,000 28 Clean
Pittsburgh Water & Sewer Auth Pittsburgh, PA 520,000 193 Clean
Erie City Water Authority Erie, PA 220,001 408 Clean
York Water Co York, PA 206,762 30 Clean
West View Water Authority Pittsburgh, PA 200,000 290 Clean
Mawc Sweeney Plant Greensburg, PA 143,000 71 Clean
Chester Water Authority Chester, PA 140,437 14 Detected
PA Amer Water Co Lake Scranton Wilkes Barre, PA 134,570 59 Detected
Mawc Yough Plant Greensburg, PA 133,000 150 Clean
Wilkinsburg-Penn Jt Water Auth Wilkinsburg, PA 125,000 155 Clean
City of Lancaster Lancaster, PA 120,000 168 Detected
Lca Allentown Division Allentown, PA 118,000 43 Detected
City of Bethlehem Bethlehem, PA 117,259 270 Clean
Veolia Water Harrisburg, PA 110,000 136 Detected
PA American Water Co West Mechanicsburg, PA 105,127 24 Detected
Easton Area Water System Easton, PA 96,867 210 Clean
Reading Area Water Authority Reading, PA 95,100 124 Detected
North Penn Water Authority Lansdale, PA 91,941 209 Detected
PA American Norristown Norristown, PA 88,885 92 Detected
North Wales Water Authority North Wales, PA 72,496 422 Detected
State College Boro Water Auth State College, PA 72,000 143 Clean
Capital Region Water Harrisburg, PA 66,540 145 Clean
Lower Bucks Co Joint Mun Auth Levittown, PA 63,007 327 Clean
Altoona Water Authority Altoona, PA 62,500 790 Clean
Hampton Shaler Water Authority Allison Park, PA 61,949 74 Clean
Aqua PA Bensalem Bryn Mawr, PA 59,001 49 Detected
Paw Ceasetown Scranton, PA 58,467 10 Clean
Lebanon Water Auth Lebanon, PA 57,000 78 Clean
Paw Nesbitt Scranton, PA 52,640 11 Clean
Bcwsa Main Lower South Warrington, PA 52,621 204 Detected
Paw Watres Scranton, PA 52,002 18 Clean
Williamsport Mun Water Auth Williamsport, PA 51,000 73 Detected
PA Amer Water Co Hummelstown, PA 50,200 15 Detected
Greater Johnstown WA Riverside Johnstown, PA 49,500 186 Clean
Beaver Falls Muni Auth Beaver Falls, PA 49,500 705 Detected
Aqua PA West Chester Bryn Mawr, PA 48,600 188 Detected
Monroeville Municipal Auth Monroeville, PA 48,500 45 Detected
Aqua PA Shenango Valley WTP Sharon, PA 48,000 39 Detected
New Kensington Muni Auth New Kensington, PA 47,800 47 Clean
Lca Wlsa Central Division Allentown, PA 47,693 283 Detected
PA American Royersford Spring City, PA 46,847 146 Detected
Veolia Mechanicsburg Harrisburg, PA 45,013 98 Detected
Hca Hazleton Division Hazleton, PA 45,000 370 Clean
PA American Water Co Butler New Castle, PA 43,286 9 Clean
PA Amer Water Co New Castle New Castle, PA 43,279 7 Detected
Aqua PA Roaring Creek Division Shamokin, PA 43,000 17 Clean
Cranberry Twp WTP Cranberry Twp, PA 42,000 58 Clean
Hanover Muni Water Works Hanover, PA 40,900 251 Detected
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