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 |
|---|---|---|---|---|
| Paw Crystal Lake | Scranton, PA | 9,773 | 3 | Detected |
| Suburban Lock Haven Water Auth | Mill Hall, PA | 9,700 | 471 | Clean |
| Icmsa Crooked Creek | Indiana, PA | 9,638 | 270 | Clean |
| Oil City | Oil City, PA | 9,608 | 83 | Clean |
| Veolia Middletown | Middletown, PA | 9,600 | 341 | Detected |
| Aqua Shenandoah | Shamokin, PA | 9,500 | 113 | Detected |
| Bellefonte Borough Water Auth | Bellefonte, PA | 9,500 | 1,031 | Clean |
| Myerstown Water Auth | Myerstown, PA | 9,500 | 234 | Clean |
| Windber Area Auth | Windber, PA | 9,463 | 141 | Clean |
| Lititz Boro | Lititz, PA | 9,397 | 73 | Detected |
| Lansford Coaldale Jt Water Aut | Lansford, PA | 9,300 | 68 | Clean |
| Muni Auth of Washington Twp | Belle Vernon, PA | 9,100 | 179 | Clean |
| Paw Bangor District | Clarks Summit, PA | 9,008 | 10 | Clean |
| Lehighton Water Authority | Lehighton, PA | 9,000 | 214 | Clean |
| Aqua PA Friendship | Bryn Mawr, PA | 8,800 | 216 | Detected |
| PA American Water Punxsy | New Castle, PA | 8,800 | 5 | Clean |
| Doylestown Boro Water Dept | Doylestown, PA | 8,700 | 210 | Detected |
| Municipal Water Auth Adams Twp | Mars, PA | 8,700 | 115 | Clean |
| Dtma Main System | Doylestown, PA | 8,655 | 203 | Detected |
| Greenville Muni Water Auth | Greenville, PA | 8,600 | 438 | Clean |
| General Authority of Franklin | Franklin, PA | 8,600 | 61 | Detected |
| Warwick Twp Lititz Sys | Lititz, PA | 8,561 | 130 | Detected |
| Merck and Co Inc | West Point, PA | 8,550 | 70 | Detected |
| Hollidaysburg Muni Auth | Hollidaysburg, PA | 8,523 | 61 | Clean |
| Salisbury Twp Water System | Allentown, PA | 8,522 | 13 | Detected |
| Dillsburg Area Authority | Dillsburg, PA | 8,506 | 194 | Detected |
| Wyomissing Boro Water System | Wyomissing, PA | 8,500 | 32 | Detected |
| Ebensburg Boro Muni Auth | Ebensburg, PA | 8,500 | 789 | Clean |
| Collegeville Trappe Joint Pwd | Trappe, PA | 8,470 | 434 | Detected |
| N Middleton Water Auth | Carlisle, PA | 8,455 | 153 | Detected |
| Lv Hospital Cedar Crest | Allentown, PA | 8,425 | 5 | - |
| Houtzdale Municipal Authority | Houtzdale, PA | 8,410 | 91 | Clean |
| Hemlock Farms (Main) | Lords Valley, PA | 8,321 | 275 | Clean |
| Wellsboro Municipal Authority | Wellsboro, PA | 8,225 | 688 | Clean |
| PA American Audubon | Norristown, PA | 8,200 | 5,456 | Detected |
| Upmc Presbyterian | Pittsburgh, PA | 8,200 | 47 | Clean |
| Aqua PA Spring Run | Bryn Mawr, PA | 8,151 | 395 | Detected |
| Boyertown Muni Auth | Boyertown, PA | 8,000 | 251 | Clean |
| Tamaqua Area Water Authority | Tamaqua, PA | 8,000 | 168 | Clean |
| Kittanning Suburb Jt Water Aut | Adrian, PA | 8,000 | 291 | Clean |
| Millersville Univ | Millersville, PA | 7,950 | 669 | Detected |
| Brighton Twp Muni Auth | Beaver, PA | 7,920 | 53 | Detected |
| Grove City Boro Water Dept | Grove City, PA | 7,871 | 143 | Clean |
| PA-American Water-Brownsville | McMurry, PA | 7,844 | 53 | Clean |
| Veolia Water Bethel | Harrisburg, PA | 7,809 | 54 | Detected |
| Conemaugh Twp Muni Auth | Davidsville, PA | 7,800 | 567 | Detected |
| Municipal Authority of Corry | Corry, PA | 7,800 | 383 | Clean |
| Edinboro Water Authority | Edinboro, PA | 7,800 | 428 | Clean |
| City of Dubois Water Depart | Dubois, PA | 7,794 | 185 | Clean |
| Edgeworth Boro Muni Auth | Leetsdale, PA | 7,781 | 23 | Clean |