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.
| System Name | Location | Population | Violations | PFAS |
|---|---|---|---|---|
| Warminster Municipal Authority | Warminster, PA | 40,000 | 2,250 | Detected |
| Northampton Boro Muni Auth | Northampton, PA | 40,000 | 10 | Clean |
| Southwestern PA Water Auth | Jefferson, PA | 40,000 | 84 | Clean |
| Oakmont Water Authority | Oakmont, PA | 39,901 | 26 | Clean |
| Newtown Artesian Water Co | Newtown, PA | 38,500 | 495 | Detected |
| Moon Twp Muni Auth | Moon Township, PA | 38,000 | 168 | Detected |
| Penn State Univ | University Park, PA | 37,000 | 171 | Clean |
| PA American Coatesville | Coatesville, PA | 36,960 | 81 | Detected |
| Northampton Bucks Co Mun Auth | Richboro, PA | 36,750 | 2,055 | Detected |
| Pottstown Borough Water Auth | Pottstown, PA | 36,000 | 172 | Detected |
| Aqua PA Uwchlan | Bryn Mawr, PA | 35,518 | 237 | Detected |
| North Fayette Cnty Muni Auth | Dunbar, PA | 35,409 | 184 | Clean |
| PA American Water Co Yardley | Yardley, PA | 33,171 | 126 | Detected |
| West Cnty Muni Auth-McKeesport | Greensburg, PA | 32,644 | 110 | Clean |
| Schuylkill Co Mun Auth | Pottsville, PA | 31,850 | 241 | Clean |
| Chambersburg Boro Water Sys | Chambersburg, PA | 31,048 | 170 | Clean |
| PA American White Deer | Milton, PA | 30,209 | 10 | Clean |
| Brodhead Creek Reg Water Auth | East Stroudsburg, PA | 30,000 | 584 | Clean |
| Latrobe Muni Auth | Latrobe, PA | 30,000 | 244 | Clean |
| Veolia Water PA Inc Bloomsburg | Bloomsburg, PA | 29,382 | 15 | Clean |
| Aqua PA Bristol | Bryn Mawr, PA | 28,727 | 92 | Detected |
| Paw Penn District | Reading, PA | 28,508 | 182 | Detected |
| Guilford Water Auth | Chambersburg, PA | 28,135 | 669 | Clean |
| Plum Boro Muni Auth | Pittsburgh, PA | 27,500 | 50 | Clean |
| Auth of Boro of Charleroi | Charleroi, PA | 27,000 | 641 | Clean |
| Pittsburgh Intl Airport | Pittsburgh, PA | 26,915 | 43 | Detected |
| Mifflin Cnty Muni Auth | Milroy, PA | 26,765 | 416 | Clean |
| Horsham Water&sewer Authority | Horsham, PA | 26,000 | 572 | Detected |
| Carlisle Water Trmt Plt | Carlisle, PA | 26,000 | 67 | Detected |
| Columbia Water Co | Columbia, PA | 25,200 | 199 | Clean |
| Paw Glen Alsace Div | Mechanicsburg, PA | 24,951 | 124 | Detected |
| Ephrata Area Joint Authority | Ephrata, PA | 24,500 | 182 | Detected |
| Falls Twp Water & Sewer Dept | Fairless Hills, PA | 24,400 | 144 | Detected |
| Paw Blue Mountain Division | Clarks Summit, PA | 23,763 | 14 | Clean |
| PA-American Water- Uniontown | Uniontown, PA | 23,125 | 62 | Clean |
| Highland S & W Auth Beaverdam | Johnstown, PA | 22,617 | 189 | Clean |
| PA American Water Co-Indiana D | New Castle, PA | 22,360 | 10 | Clean |
| Nwwa Warrington Township | North Wales, PA | 21,588 | 1,675 | Detected |
| Dover Twp Water Sys | Dover, PA | 21,097 | 1,446 | Detected |
| Muhlenberg Twp Muni Auth | Reading, PA | 21,000 | 597 | Detected |
| East Hempfield Water Auth | Landisville, PA | 20,988 | 63 | Detected |
| Paw Philipsburg | Philipsburg, PA | 20,784 | 0 | Clean |
| Ambler Boro Water Dept | Ambler, PA | 20,000 | 2,896 | Detected |
| St Marys Area Water Auth | Saint Marys, PA | 19,588 | 483 | Clean |
| Ambridge Water Auth | Ambridge, PA | 19,500 | 269 | Clean |
| Western Allegheny County Mun A | Oakdale, PA | 19,031 | 101 | Detected |
| Center Twp Water Auth | Aliquippa, PA | 19,000 | 513 | Clean |
| Elizabethtown Area Water | Elizabethtown, PA | 19,000 | 405 | Detected |
| Fox Chapel Auth | Pittsburgh, PA | 18,500 | 21 | Clean |
| Bradford City Water Authority | Bradford, PA | 18,500 | 313 | Clean |