Largest water suppliers
Lead is the LCR 90th-percentile result; a value above 0.015 mg/L exceeds the
EPA action level. “—” means no lead sample is on file for that supplier.
| Supplier | City | Population | Lead (p90) |
|---|---|---|---|
| Philadelphia Water Department | Philadelphia | 1,600,000 | 0.0020 mg/L |
| Aqua Pa Main System | — | 822,600 | 0.0000 mg/L |
| Pa Amer Water Co-Pittsburgh | — | 686,000 | 0.0040 mg/L |
| Pittsburgh Water & Sewer Auth | Pittsburgh | 520,000 | 0.0020 mg/L |
| Erie City Water Authority | Erie | 220,001 | 0.0011 mg/L |
| York Water Co | York | 206,762 | 0.0030 mg/L |
| West View Water Authority | Pittsburgh | 200,000 | 0.0000 mg/L |
| Mawc Sweeney Plant | Greensburg | 143,000 | 0.0035 mg/L |
| Chester Water Authority | Chester | 140,437 | 0.0048 mg/L |
| Pa Amer Water Co Lake Scranton | — | 137,142 | 0.0010 mg/L |
| Mawc Yough Plant | — | 133,000 | 0.0000 mg/L |
| Wilkinsburg-Penn Jt Water Auth | Wilkinsburg | 125,000 | 0.0098 mg/L |
| City of Lancaster | Lancaster | 120,000 | 0.0070 mg/L |
| Lca Allentown Division | Allentown | 118,000 | 0.0070 mg/L |
| City of Bethlehem | Bethlehem | 117,259 | 0.0000 mg/L |
| Veolia Water | Harrisburg | 110,000 | 0.0021 mg/L |
| Pa American Water Co West | Mechanicsburg | 105,127 | 0.0000 mg/L |
| Easton Area Water System | Easton | 96,867 | 0.0000 mg/L |
| Reading Area Water Authority | Reading | 95,100 | 0.0000 mg/L |
| North Penn Water Authority | Lansdale | 91,941 | 0.0005 mg/L |
| Pa American Norristown | Norristown | 88,885 | 0.0020 mg/L |
| North Wales Water Authority | — | 72,496 | 0.0016 mg/L |
| State College Boro Water Auth | State College | 72,000 | 0.0037 mg/L |
| Capital Region Water | Harrisburg | 66,540 | 0.0000 mg/L |
| Lower Bucks Co Joint Mun Auth | Levittown | 63,007 | 0.0000 mg/L |
| Altoona Water Authority | Altoona | 62,500 | 0.0029 mg/L |
| Hampton Shaler Water Authority | Allison Park | 61,949 | 0.0013 mg/L |
| Aqua Pa Bensalem | — | 59,001 | 0.0000 mg/L |
| Paw Ceasetown | — | 58,467 | 0.0000 mg/L |
| Lebanon Water Auth | Lebanon | 57,000 | 0.0071 mg/L |
| Paw Nesbitt | — | 52,640 | 0.0000 mg/L |
| Bcwsa Main Lower South | Warrington | 52,621 | 0.0000 mg/L |
| Paw Watres | — | 52,002 | 0.0000 mg/L |
| Williamsport Mun Water Auth | Williamsport | 51,000 | 0.0020 mg/L |
| Pa Amer Water Co | Hummelstown | 50,200 | 0.0030 mg/L |
| Pa American Royersford | — | 49,508 | 0.0020 mg/L |
| Greater Johnstown Wa Riverside | Johnstown | 49,500 | 0.0050 mg/L |
| Beaver Falls Muni Auth | Beaver Falls | 49,500 | 0.0013 mg/L |
| Aqua Pa West Chester | Bryn Mawr | 48,600 | 0.0000 mg/L |
| Monroeville Municipal Auth | Monroeville | 48,500 | 0.0015 mg/L |
| Aqua Pa Shenango Valley Wtp | Sharon | 48,000 | 0.0000 mg/L |
| New Kensington Muni Auth | New Kensington | 47,800 | 0.0000 mg/L |
| Lca Wlsa Central Division | Allentown | 47,693 | 0.0020 mg/L |
| Veolia Mechanicsburg | — | 45,013 | 0.0033 mg/L |
| Hca Hazleton Division | Hazleton | 45,000 | 0.0000 mg/L |
| Pa American Water Co Butler | — | 43,286 | 0.0020 mg/L |
| Pa Amer Water Co New Castle | New Castle | 43,279 | 0.0020 mg/L |
| Aqua Pa Roaring Creek Division | Shamokin | 43,000 | 0.0019 mg/L |
| Cranberry Twp Wtp | Cranberry Twp | 42,000 | 0.0005 mg/L |
| Hanover Muni Water Works | Hanover | 40,900 | 0.0020 mg/L |
| Southwestern Pa Water Auth | Jefferson | 40,200 | 0.0009 mg/L |
| Northampton Boro Muni Auth | Northampton | 40,000 | 0.0000 mg/L |
| Oakmont Water Authority | Oakmont | 39,901 | 0.0005 mg/L |
| Newtown Artesian Water Co | Newtown | 38,500 | 0.0000 mg/L |
| Moon Twp Muni Auth | Moon Township | 38,000 | 0.0019 mg/L |
| Penn State Univ | University Park | 37,000 | 0.0108 mg/L |
| Pa American Coatesville | Coatesville | 36,960 | 0.0020 mg/L |
| Northampton Bucks Co Mun Auth | Richboro | 36,750 | 0.0010 mg/L |
| Pottstown Borough Water Auth | Pottstown | 36,000 | 0.0009 mg/L |
| Warminster Municipal Authority | — | 36,000 | 0.0000 mg/L |
| Aqua Pa Uwchlan | Bryn Mawr | 35,518 | 0.0022 mg/L |
| North Fayette Cnty Muni Auth | Dunbar | 35,409 | 0.0022 mg/L |
| Pa American Water Co Yardley | Yardley | 33,171 | 0.0010 mg/L |
| West Cnty Muni Auth-Mckeesport | — | 32,644 | 0.0000 mg/L |
| Schuylkill Co Mun Auth | Pottsville | 31,850 | 0.0011 mg/L |
| Chambersburg Boro Water Sys | Chambersburg | 31,048 | 0.0047 mg/L |
| Pa American White Deer | — | 30,209 | 0.0000 mg/L |
| Latrobe Muni Auth | Latrobe | 30,000 | 0.0016 mg/L |
| Brodhead Creek Reg Water Auth | East Stroudsburg | 30,000 | 0.0006 mg/L |
| Mifflin Cnty Muni Auth | — | 29,432 | 0.0012 mg/L |
| Veolia Water Pa Inc Bloomsburg | Bloomsburg | 29,382 | 0.0080 mg/L |
| Aqua Pa Bristol | — | 28,727 | 0.0000 mg/L |
| Paw Penn District | Reading | 28,508 | 0.0030 mg/L |
| Guilford Water Auth | Chambersburg | 28,135 | 0.0000 mg/L |
| Plum Boro Muni Auth | Pittsburgh | 27,500 | 0.0037 mg/L |
| Auth of Boro of Charleroi | Charleroi | 27,000 | 0.0032 mg/L |
| Horsham Water&Sewer Authority | Horsham | 26,000 | 0.0000 mg/L |
| Carlisle Water Trmt Plt | Carlisle | 26,000 | 0.0026 mg/L |
| Columbia Water Co | Columbia | 25,200 | 0.0010 mg/L |
| Paw Glen Alsace Div | — | 24,951 | 0.0020 mg/L |
| Ephrata Area Joint Authority | Ephrata | 24,500 | 0.0015 mg/L |
| Falls Twp Water & Sewer Dept | Fairless Hills | 24,400 | 0.0016 mg/L |
| Paw Blue Mountain Division | — | 23,763 | 0.0050 mg/L |
| Pa-American Water- Uniontown | Uniontown | 23,125 | 0.0010 mg/L |
| Highland S & W Auth Beaverdam | Johnstown | 22,617 | 0.0000 mg/L |
| Muhlenberg Twp Muni Auth | Reading | 22,400 | 0.0010 mg/L |
| Pa American Water Co-Indiana D | — | 22,360 | 0.0000 mg/L |
| Nwwa Warrington Township | North Wales | 21,588 | 0.0006 mg/L |
| Dover Twp Water Sys | Dover | 21,097 | 0.0049 mg/L |
| East Hempfield Water Auth | Landisville | 20,988 | 0.0080 mg/L |
| Paw Philipsburg | Philipsburg | 20,865 | 0.0000 mg/L |
| Ambler Boro Water Dept | Ambler | 20,000 | 0.0023 mg/L |
| St Marys Area Water Auth | Saint Marys | 19,588 | 0.0033 mg/L |
| Ambridge Water Auth | Ambridge | 19,500 | 0.0093 mg/L |
| Western Allegheny County Mun a | Oakdale | 19,031 | 0.0009 mg/L |
| Center Twp Water Auth | Aliquippa | 19,000 | 0.0014 mg/L |
| Elizabethtown Area Water | Elizabethtown | 19,000 | 0.0030 mg/L |
| Fox Chapel Auth | Pittsburgh | 18,500 | 0.0000 mg/L |
| Bradford City Water Authority | Bradford | 18,500 | 0.0013 mg/L |
| Pawc Pocono District | Tobyhanna | 17,860 | 0.0000 mg/L |