EPA UCMR 5 results for 390 public water systems. 176 had at least one PFAS detected; 117 had a highest single PFOA or PFOS result above 4.0 ppt.
UCMR 5 is a one-time EPA monitoring program, not a compliance determination. The values shown are the highest single sample result at any of the system's sampling points; one result above 4.0 ppt does not mean the system violates the PFAS rule, which is judged on running annual averages under separate compliance monitoring. Results describe the public water system, not an individual home.
| Water system | Serves | PFOA max (ppt) | PFOS max (ppt) | PFAS detected |
|---|---|---|---|---|
| Akron Borough PA7360128 | Lancaster County | 5 | 4.4 | 7 |
| Albion Borough PA6250007 | Erie County | ND | ND | 0 |
| Altoona Water Authority PA4070023 | Blair County | ND | ND | 0 |
| Ambler Boro Water Dept PA1460020 | Montgomery County | 15.3 | 13.7 | 10 |
| Ambridge Water Auth PA5040008 | Beaver County | ND | ND | 0 |
| Aqua PA Bensalem PA1090078 | Bucks County | 8 | 7.5 | 8 |
| Aqua PA Bristol PA1090001 | Bucks County | 4.5 | ND | 3 |
| Aqua PA Chalfont PA1090005 | Bucks County | 8.8 | 19 | 8 |
| Aqua PA Fawn Lake Forest PA2520037 | Pike County | ND | ND | 1 |
| Aqua PA Flying Hills WA Sys PA3060018 | Berks County | 6.3 | 6.4 | 4 |
| Aqua PA Friendship PA1150137 | Chester County | 7.7 | 9.5 | 8 |
| Aqua PA Hatboro PA1460028 | Montgomery County | 16.2 | 21.5 | 8 |
| Aqua PA Inc Treasure Lake Div PA6170048 | Clearfield County | ND | ND | 0 |
| Aqua PA Jenks TWP WTP PA6270008 | Forest County | ND | ND | 0 |
| Aqua PA Lake Latonka WTP PA6430059 | Mercer County | ND | ND | 0 |
| Aqua PA Main System PA1460073 | Montgomery County | 12.6 | 9.2 | 9 |
| Aqua PA Perkiomen Township PA1460069 | Montgomery County | 10.8 | 7.4 | 7 |
| Aqua PA Roaring Creek Division PA4490024 | Northumberland County | ND | ND | 0 |
| Aqua PA Shenango Valley WTP PA6430054 | Mercer County | ND | ND | 1 |
| Aqua PA Spring Run PA1150089 | Chester County | 6.8 | 4.4 | 9 |
| Aqua PA Superior Main System PA1460085 | Montgomery County | 11.8 | 5.8 | 6 |
| Aqua PA Susquehanna Division PA2080028 | Bradford County | ND | ND | 0 |
| Aqua PA Uwchlan PA1150035 | Chester County | 9.3 | 7.1 | 6 |
| Aqua PA Water Co Honesdale PA2640018 | Wayne County | ND | ND | 0 |
| Aqua PA West Chester PA1150098 | Chester County | 5.9 | ND | 5 |
| Ashland Area Water Authority PA3540030 | Schuylkill County | ND | 20.1 | 4 |
| Audubon Water Company PA1460055 | Montgomery County | 30.8 | 57.9 | 9 |
| Auth of Boro of Charleroi PA5630039 | Washington County | ND | ND | 0 |
| BCWSA Main Lower South PA1090079 | Bucks County | 7.3 | 6.9 | 8 |
| Baden Boro Water Dept PA5040080 | Beaver County | ND | ND | 0 |
| Bangor Area School Complex PA3480816 | Northampton County | ND | ND | 1 |
| Bear Valley Joint Auth PA7280043 | Franklin County | ND | ND | 1 |
| Beaver Boro Muni Auth PA5040009 | Beaver County | 7 | 4.9 | 8 |
| Beaver Falls Muni Auth PA5040012 | Beaver County | 5.4 | 4 | 6 |
| Belle Vernon Boro Muni Auth PA5260004 | Fayette County | ND | ND | 0 |
| Bellefonte Borough Water Auth PA4140075 | Centre County | ND | ND | 0 |
| Birdsboro Muni Water Auth PA3060010 | Berks County | ND | ND | 0 |
| Blairsville Muni Auth PA5320006 | Indiana County | ND | ND | 0 |
| Blue Mtn Coop Tilden Ind Park PA3061067 | Berks County | ND | ND | 2 |
| Blythe TWP Municipal Authority PA3540017 | Schuylkill County | ND | ND | 0 |
| Boro of Waynesboro PA7280032 | Franklin County | ND | ND | 0 |
| Boyertown Muni Auth PA3060081 | Berks County | ND | ND | 0 |
| Brackenridge Boro Water Dept PA5020006 | Allegheny County | ND | ND | 0 |
| Bradford City Water Authority PA6420014 | McKean County | ND | ND | 0 |
| Brighton TWP Muni Auth PA5040017 | Beaver County | ND | ND | 4 |
| Brockway Boro Municipal Auth PA6330002 | Jefferson County | ND | ND | 0 |
| Brodhead Creek Reg Water Auth PA2450034 | Monroe County | ND | ND | 0 |
| Brookville Municipal Auth PA6330004 | Jefferson County | ND | ND | 1 |
| Buck Hill Falls Water Co PA2450020 | Monroe County | ND | ND | 0 |
| Buckingham TWP Cold Spring PA1090137 | Bucks County | 22 | 19.3 | 7 |
| Bucks County Community College PA1090962 | Bucks County | 7.1 | ND | 1 |
| Buffalo TWP Mun Auth Freeport PA5030019 | Armstrong County | ND | ND | 0 |
| Cabot Oil and Gas PA2580558 | Susquehanna County | ND | ND | 0 |
| Caernarvon TWP Auth PA3060052 | Berks County | 55.8 | ND | 6 |
| Capital Region Water PA7220049 | Dauphin County | ND | ND | 0 |
| Carbon Plaza Mall PA3130308 | Carbon County | ND | ND | 0 |
| Carlisle Water TRMT PLT PA7210002 | Cumberland County | 5 | 11.3 | 6 |
| Catasauqua Mun Water Works PA3390044 | Lehigh County | ND | ND | 2 |
| Center TWP Water Auth PA5040007 | Beaver County | ND | ND | 0 |
| Central Indiana Co Water Auth PA5320040 | Indiana County | ND | ND | 0 |
| Centre Hall Boro Water Dept PA4140077 | Centre County | ND | ND | 0 |
| Chambersburg Boro Water Sys PA7280005 | Franklin County | ND | ND | 0 |
| Chester Water Authority PA1230004 | Delaware County | 5.1 | ND | 4 |
| City of Bethlehem PA3480046 | Northampton County | ND | ND | 0 |
| City of Dubois Water Depart PA6170016 | Clearfield County | ND | ND | 0 |
| City of Lancaster, PA PA7360058 | Lancaster County | 23.8 | ND | 6 |
| City of Lock Haven Water Dept PA4180048 | Clinton County | ND | ND | 0 |
| Clearfield Municipal Auth PA6170008 | Clearfield County | ND | ND | 1 |
| College TWP. Water Authority PA4140082 | Centre County | ND | ND | 2 |
| Collegeville Trappe Joint PWD PA1460022 | Montgomery County | 235 | 15 | 8 |
| Columbia Water Co PA7360123 | Lancaster County | ND | ND | 0 |
| Conemaugh TWP Muni Auth PA4560048 | Somerset County | ND | ND | 1 |
| Conneaut Lake Borough WTP PA6200015 | Crawford County | ND | ND | 0 |
| Cooper TWP Municipal Auth PA6170041 | Clearfield County | ND | ND | 0 |
| Coraopolis Water & Sewer Auth PA5020010 | Allegheny County | 5.2 | 18.8 | 7 |
| Coudersport Boro Authority PA6530009 | Potter County | ND | ND | 0 |
| Cranberry TWP WTP PA5100094 | Butler County | ND | ND | 0 |
| Creative Kids East Child Dev PA3391032 | Lehigh County | ND | ND | 0 |
| Creswell Heights JT Auth PA5040063 | Beaver County | ND | ND | 0 |
| Croyle TWP Water Auth PA4110299 | Cambria County | ND | ND | 0 |
| Dallastown Yoe Water Auth PA7670085 | York County | ND | ND | 0 |
| Danville Municipal Water Auth PA4470007 | Montour County | ND | ND | 2 |
| Denver Boro PA7360017 | Lancaster County | ND | ND | 2 |
| Derry Boro Muni Auth PA5650049 | Westmoreland County | ND | ND | 1 |
| Dillsburg Area Authority PA7670071 | York County | 4.8 | 4.7 | 4 |
| Dover TWP Water Sys PA7670073 | York County | 5.9 | 9.6 | 6 |
| Downingtown Water Authority PA1150026 | Chester County | 4.2 | ND | 4 |
| Doylestown Boro Water Dept PA1090081 | Bucks County | 14.6 | 11.3 | 10 |
| Dtma Main System PA1090128 | Bucks County | 14.2 | 13.4 | 8 |
| Duquesne Water Dept PA5020012 | Allegheny County | ND | ND | 0 |
| E Armstrong Cnty Muni Auth PA5030004 | Armstrong County | ND | ND | 0 |
| E Stroudsburg Boro Water Dept PA2450023 | Monroe County | ND | ND | 0 |
| Eagle Lake Community Assoc PA2350833 | Lackawanna County | 8.1 | ND | 5 |
| East Cocalico Township PA7360113 | Lancaster County | 4.5 | 4.9 | 5 |
| East Donegal TWP Municipal Aut PA7360083 | Lancaster County | ND | ND | 2 |
| East Dunkard Water Authority PA5300012 | Greene County | ND | ND | 0 |
| East Hempfield Water Auth PA7360063 | Lancaster County | 9 | 5 | 5 |
| East Penn MFG Co PA3060681 | Berks County | ND | ND | 0 |
| East Petersburg Borough PA7360135 | Lancaster County | 6.3 | 15.2 | 7 |
| Easton Area Water System PA3480050 | Northampton County | ND | ND | 0 |
| Ebensburg Boro Muni Auth PA4110009 | Cambria County | ND | ND | 0 |
| Edgeworth Boro Muni Auth PA5020015 | Allegheny County | ND | ND | 0 |
| Edinboro Water Authority PA6250022 | Erie County | ND | ND | 0 |
| Eei Meadows Complex PA2400115 | Luzerne County | ND | 5.9 | 2 |
| Elizabethtown Area Water PA7360124 | Lancaster County | ND | 5.7 | 5 |
| Ellsworth Boro Water Dept PA5630044 | Washington County | ND | ND | 0 |
| Emmaus Borough Public Water PA3390032 | Lehigh County | 22.4 | 153 | 13 |
| Emporium Water Company PA6120002 | Cameron County | ND | ND | 0 |
| Ephrata Area Joint Authority PA7360045 | Lancaster County | 5.8 | 4.6 | 6 |
| Erie City Water Authority PA6250028 | Erie County | ND | ND | 0 |
| Evitts Creek Water Co PA4050028 | Bedford County | ND | ND | 0 |
| Fairview TWP Water Auth Dist 3 PA6250040 | Erie County | ND | ND | 0 |
| Fairview TWP Water Authority PA6250087 | Erie County | ND | ND | 0 |
| Falls TWP Water & Sewer Dept PA1090022 | Bucks County | ND | ND | 2 |
| Fannett Metal SCH Dist PA7280369 | Franklin County | ND | ND | 0 |
| Fawn Frazer JT Water Auth PA5020076 | Allegheny County | ND | ND | 1 |
| Findlay TWP Municipal Auth PA5020078 | Allegheny County | ND | ND | 0 |
| Fishertown Water Assn PA4050029 | Bedford County | ND | ND | 0 |
| Fleetwood Boro Water System PA3060029 | Berks County | ND | ND | 0 |
| Fox Chapel Auth PA5020040 | Allegheny County | ND | ND | 0 |
| Foxcroft Manor Mobile Home PK PA4410166 | Lycoming County | ND | ND | 0 |
| Franklin Co Gen Auth PA7280045 | Franklin County | ND | ND | 0 |
| Freeland Boro Muni Water Auth PA2400054 | Luzerne County | 5.6 | 9.1 | 5 |
| Geisinger Medical Center PA4470012 | Montour County | ND | ND | 0 |
| General Authority of Franklin PA6610020 | Venango County | ND | ND | 1 |
| Gettysburg Muni Auth PA7010019 | Adams County | 7.4 | 14.1 | 5 |
| Girard Boro Water Dept PA6250049 | Erie County | ND | ND | 0 |
| Glendale Valley Municipal Auth PA4110060 | Cambria County | ND | ND | 0 |
| Greater Johnstown WA Riverside PA4110034 | Cambria County | ND | ND | 0 |
| Greencastle Area Water Auth PA7280014 | Franklin County | ND | ND | 0 |
| Greenville Muni Water Auth PA6430037 | Mercer County | ND | ND | 0 |
| Grove City Boro Water Dept PA6430040 | Mercer County | ND | ND | 0 |
| Guilford Water Auth PA7280038 | Franklin County | ND | ND | 0 |
| Hamburg Muni Water&Sewer Auth PA3060035 | Berks County | ND | ND | 0 |
| Hampton Shaler Water Authority PA5020019 | Allegheny County | ND | ND | 0 |
| Hanover Muni Water Works PA7670076 | York County | ND | ND | 1 |
| Harmony Boro Water Auth PA5100042 | Butler County | ND | ND | 1 |
| Harrison TWP Water Auth PA5020108 | Allegheny County | ND | ND | 0 |
| Hastings Muni Auth PA4110013 | Cambria County | ND | ND | 0 |
| Hca Hazleton Division PA2408001 | Luzerne County | ND | ND | 0 |
| Hegins Hubley Authority PA3540047 | Schuylkill County | ND | ND | 0 |
| Hellertown Borough Authority PA3480052 | Northampton County | ND | ND | 2 |
| Hemlock Farms (Main) PA2520033 | Pike County | ND | ND | 0 |
| Hickory Hills MHC PA3480015 | Northampton County | ND | ND | 0 |
| Highland S & W Auth Beaverdam PA4110017 | Cambria County | ND | ND | 0 |
| Highridge Water Auth PA5650069 | Westmoreland County | 4.3 | 4.5 | 6 |
| Hilltown TWP Water&Sewer Auth PA1090117 | Bucks County | 8 | 6.8 | 5 |
| Hollidaysburg Muni Auth PA4070017 | Blair County | ND | ND | 0 |
| Horsham Water&Sewer Authority PA1460033 | Montgomery County | 17.5 | 33.8 | 8 |
| Houtzdale Municipal Authority PA6170023 | Clearfield County | ND | ND | 0 |
| Humboldt Industrial Park PA2400806 | Luzerne County | ND | ND | 2 |
| Huntingdon Boro Water Dept PA4310012 | Huntingdon County | ND | ND | 0 |
| Icmsa Crooked Creek PA5320109 | Indiana County | ND | ND | 0 |
| Indian Creek Valley Water Auth PA5260011 | Fayette County | ND | ND | 0 |
| Jamie Hollanders PA1090329 | Bucks County | 16.8 | 9.7 | 7 |
| Jersey Shore Area JNT Wat Auth PA4410156 | Lycoming County | ND | ND | 0 |
| Kennett Square Mun Water Works PA1150108 | Chester County | 17.7 | 14.4 | 8 |
| Kittanning Suburb JT Water Aut PA5030043 | Armstrong County | ND | ND | 0 |
| Kline Township Mun Authority PA3540014 | Schuylkill County | ND | ND | 0 |
| Knoebels Grove Park PA4190398 | Columbia County | ND | ND | 0 |
| Kutztown Borough Water PA3060041 | Berks County | ND | ND | 0 |
| Lakeview Mobilehome Park PA5100080 | Butler County | ND | ND | 0 |
| Lansford Coaldale JT Water Aut PA3130004 | Carbon County | ND | ND | 0 |
| Latrobe Muni Auth PA5650060 | Westmoreland County | ND | ND | 0 |
| Lawn Turnpike Plaza PA7381001 | Lebanon County | ND | ND | 0 |
| Lca Allentown Division PA3390024 | Lehigh County | ND | 4.4 | 4 |
| Lca North Whitehall Division PA3390055 | Lehigh County | ND | ND | 1 |
| Lca Wlsa Central Division PA3390073 | Lehigh County | 4.4 | ND | 5 |
| Lebanon Water Auth PA7380010 | Lebanon County | ND | ND | 0 |
| Lehighton Water Authority PA3130009 | Carbon County | ND | ND | 0 |
| Lehman Jackson Elementary PA2400370 | Luzerne County | 5.2 | 5.5 | 3 |
| Lewistown Boro Muni Auth PA4440010 | Mifflin County | ND | ND | 0 |
| Lititz Boro PA7360126 | Lancaster County | ND | ND | 1 |
| Littlestown Boro PA7010022 | Adams County | 4.5 | 12.9 | 6 |
| London Grove TWP Mun Auth PA1150165 | Chester County | ND | ND | 4 |
| Lower Bucks Co Joint Mun Auth PA1090026 | Bucks County | ND | ND | 0 |
| Lower Saucon Authority PA3480027 | Northampton County | ND | ND | 0 |
| Lutheran Home At Topton PA3060094 | Berks County | ND | ND | 0 |
| Mahanoy TWP Auth PA3540011 | Schuylkill County | ND | ND | 0 |
| Maidencreek TWP Water Auth PA3060012 | Berks County | ND | ND | 2 |
| Manheim Area Water & Sewer Aut PA7360078 | Lancaster County | 12.8 | 7.9 | 6 |
| Manheim Auto Auction PA7360345 | Lancaster County | ND | 8.1 | 2 |
| Manor TWP JT Muni Auth PA5030006 | Armstrong County | ND | ND | 0 |
| Mansfield Borough Mun Auth PA2590038 | Tioga County | ND | ND | 0 |
| Maple Manor MHP PA5100071 | Butler County | ND | ND | 0 |
| Masonic Homes PA7360025 | Lancaster County | 4.8 | ND | 3 |
| Masontown Muni Water Works PA5260013 | Fayette County | ND | ND | 0 |
| Mawc Sweeney Plant PA5650032 | Westmoreland County | ND | ND | 0 |
| Mawc Yough Plant PA5260036 | Fayette County | ND | ND | 0 |
| Meadville Area Water Authority PA6200036 | Crawford County | ND | ND | 0 |
| Merck and Co Inc PA1461065 | Montgomery County | ND | ND | 1 |
| Meshoppen Borough Water Co PA2660010 | Wyoming County | ND | ND | 0 |
| Middlesex TWP Muni Auth PA7210063 | Cumberland County | ND | ND | 0 |
| Mifflinburg Boro Water Dept PA4600012 | Union County | ND | ND | 0 |
| Mifflintown Muni Auth PA4340008 | Juniata County | ND | ND | 0 |
| Milford TWP Water Authority PA1090125 | Bucks County | ND | ND | 2 |
| Millersburg Water Auth PA7220034 | Dauphin County | 4.5 | 10 | 4 |
| Millersville Univ PA7360127 | Lancaster County | 5.4 | 5.3 | 7 |
| Millville Municipal Authority PA4190017 | Columbia County | ND | ND | 0 |
| Minersville Municipal Water Au PA3540035 | Schuylkill County | ND | ND | 0 |
| Monaca Boro Water Dept PA5040039 | Beaver County | ND | ND | 2 |
| Monroeville Municipal Auth PA5020027 | Allegheny County | ND | ND | 1 |
| Montoursville Water Company PA4410175 | Lycoming County | 6.6 | 12.1 | 5 |
| Moon TWP Muni Auth PA5020011 | Allegheny County | ND | 10 | 3 |
| Morrisville Munic Authority PA1090037 | Bucks County | ND | ND | 1 |
| Mountain Water Assn PA5260032 | Fayette County | ND | ND | 0 |
| Mt Airy Casino & Resort PA2450677 | Monroe County | ND | ND | 0 |
| Mt Hope Est & Winery PA7360320 | Lancaster County | 4.1 | ND | 3 |
| Mt Joy Boro Auth PA7360091 | Lancaster County | ND | ND | 1 |
| Mt Penn Boro Muni Auth PA3060082 | Berks County | ND | 5.7 | 2 |
| Mt Union Municipal Auth PA4310016 | Huntingdon County | ND | ND | 0 |
| Muhlenberg TWP Muni Auth PA3060038 | Berks County | 8.8 | 11.5 | 9 |
| Mun Auth of Boro of Bedford PA4050002 | Bedford County | ND | ND | 0 |
| Mun Water Auth of Aliquippa PA5040006 | Beaver County | ND | ND | 1 |
| Muni Auth of Washington TWP PA5260009 | Fayette County | ND | ND | 0 |
| Municipal Authority Sunbury PA4490007 | Northumberland County | ND | ND | 0 |
| Municipal Authority of Corry PA6250012 | Erie County | ND | ND | 0 |
| Municipal Water Auth Adams TWP PA5100141 | Butler County | ND | ND | 0 |
| Myerstown Water Auth PA7380025 | Lebanon County | ND | ND | 0 |
| N Middleton Water Auth PA7210049 | Cumberland County | 8 | 16.9 | 6 |
| Nanty Glo Water Auth PA4110023 | Cambria County | ND | ND | 1 |
| Neville TWP Water Dept PA5020029 | Allegheny County | ND | ND | 0 |
| New Freedom Boro Water Auth PA7670082 | York County | ND | ND | 5 |
| New Holland Borough PA7360099 | Lancaster County | 5.1 | 8.3 | 7 |
| New Kensington Muni Auth PA5650070 | Westmoreland County | ND | ND | 0 |
| New Oxford Munci Auth PA7010025 | Adams County | 4.3 | 4.8 | 6 |
| New Sewickley TWP Muni Auth PA5040085 | Beaver County | ND | ND | 4 |
| New Wilmington Boro Water Dept PA6370035 | Lawrence County | ND | ND | 0 |
| Newtown Artesian Water Co PA1090043 | Bucks County | 12.3 | 7.9 | 6 |
| Newville Boro Water Auth PA7210041 | Cumberland County | ND | ND | 0 |
| North East Borough Water Dept PA6250061 | Erie County | ND | ND | 0 |
| North Fayette Cnty Muni Auth PA5260019 | Fayette County | ND | ND | 0 |
| North Penn Water Authority PA1460034 | Montgomery County | 5.1 | ND | 3 |
| North Sewickley Mun Water Auth PA5040010 | Beaver County | ND | ND | 4 |
| North Wales Water Authority PA1460048 | Montgomery County | 13 | 11.1 | 9 |
| Northampton Boro Muni Auth PA3480057 | Northampton County | ND | ND | 0 |
| Northampton Bucks Co Mun Auth PA1090089 | Bucks County | 19.6 | 23 | 9 |
| Northern Cambria Muni Water PA4110003 | Cambria County | ND | ND | 0 |
| Nwwa Warrington Township PA1090070 | Bucks County | ND | ND | 1 |
| Oakmont Water Authority PA5020036 | Allegheny County | ND | ND | 0 |
| Oil City PA6610023 | Venango County | ND | ND | 0 |
| Outlet Shops At Gettysburg PA7010952 | Adams County | 4.5 | 4.4 | 4 |
| Oxford Borough PA1150066 | Chester County | 4.3 | ND | 5 |
| PA Am Water Co-Frackville Dist PA3540032 | Schuylkill County | ND | 15 | 4 |
| PA Amer Water Co PA7220017 | Dauphin County | 4.3 | ND | 5 |
| PA Amer Water Co Brownell PA2359001 | Lackawanna County | ND | ND | 0 |
| PA Amer Water Co Ellwood Cty PA6370011 | Lawrence County | ND | ND | 4 |
| PA Amer Water Co Lake Scranton PA2359008 | Lackawanna County | 4.9 | 7.6 | 5 |
| PA Amer Water Co New Castle PA6370034 | Lawrence County | ND | ND | 3 |
| PA Amer Water Co Susquehanna PA2580024 | Susquehanna County | ND | ND | 0 |
| PA Amer Water Co-Pittsburgh PA5020039 | Allegheny County | ND | ND | 0 |
| PA American Coatesville PA1150106 | Chester County | ND | ND | 2 |
| PA American Norristown PA1460046 | Montgomery County | ND | ND | 4 |
| PA American Royersford PA1150166 | Chester County | 9.1 | 10.7 | 8 |
| PA American Water Berwick PA4190013 | Columbia County | 7.9 | 4 | 7 |
| PA American Water Co Butler PA5100012 | Butler County | ND | ND | 0 |
| PA American Water Co Clarion PA6160001 | Clarion County | ND | ND | 0 |
| PA American Water Co Kane PA6420019 | McKean County | ND | ND | 0 |
| PA American Water Co Warren PA6620020 | Warren County | ND | ND | 0 |
| PA American Water Co West PA7210029 | Cumberland County | 4.9 | 10.4 | 4 |
| PA American Water Co Yardley PA1090074 | Bucks County | 9.7 | 6.1 | 7 |
| PA American Water Co-Indiana D PA5320025 | Indiana County | ND | ND | 0 |
| PA American Water Punxsy PA6330010 | Jefferson County | ND | ND | 0 |
| PA American Water Steelton PA7220036 | Dauphin County | ND | ND | 0 |
| PA American White Deer PA4490023 | Northumberland County | ND | ND | 0 |
| PA-American Water Co-Connellsv PA5260022 | Fayette County | ND | ND | 0 |
| PA-American Water Co-Kittannig PA5030008 | Armstrong County | ND | ND | 0 |
| PA-American Water- Uniontown PA5260020 | Fayette County | ND | ND | 0 |
| PA-American Water-Brownsville PA5260005 | Fayette County | ND | ND | 0 |
| Palmerton Municipal Authority PA3130012 | Carbon County | 42.5 | 40 | 8 |
| Paradise Stream Resort Well 2 PA2450542 | Monroe County | ND | 4.8 | 1 |
| Paw Bangor District PA3480038 | Northampton County | ND | ND | 0 |
| Paw Blue Mountain Division PA3480055 | Northampton County | ND | ND | 0 |
| Paw Ceasetown PA2409002 | Luzerne County | ND | ND | 0 |
| Paw Crystal Lake PA2409003 | Luzerne County | ND | ND | 1 |
| Paw Glen Alsace Div PA3060088 | Berks County | 5.8 | 12.7 | 7 |
| Paw Huntsville PA2409013 | Luzerne County | ND | ND | 0 |
| Paw Nesbitt PA2409010 | Luzerne County | ND | ND | 0 |
| Paw Penn District PA3060069 | Berks County | 6.5 | 16.4 | 8 |
| Paw Philipsburg PA4140087 | Centre County | ND | ND | 0 |
| Paw Watres PA2409011 | Luzerne County | ND | ND | 0 |
| Pawc Pocono District PA2450063 | Monroe County | 5.7 | 5.2 | 5 |
| Pawc Saw Creek Estates PA2520062 | Pike County | ND | ND | 0 |
| Penn Estates Utilities Incorp PA2450065 | Monroe County | ND | ND | 0 |
| Penn National Gaming PA7220059 | Dauphin County | ND | ND | 0 |
| Penn State Univ. PA4140095 | Centre County | ND | ND | 0 |
| Penns Creek Municipal Auth PA4550019 | Snyder County | ND | ND | 0 |
| Perkasie Regional Authority PA1090046 | Bucks County | 6.5 | 17.6 | 4 |
| Philadelphia Water Department PA1510001 | Philadelphia County | 8.1 | 6 | 8 |
| Phoenixville Water Dept PA1150077 | Chester County | 5.9 | 5.1 | 7 |
| Pike TWP Municipal Authority PA6170013 | Clearfield County | ND | ND | 0 |
| Pittsburgh Intl Airport PA5020947 | Allegheny County | ND | 7 | 3 |
| Pittsburgh Water & Sewer Auth PA5020038 | Allegheny County | ND | ND | 0 |
| Pleasant Valley Water Auth PA5260006 | Fayette County | ND | ND | 0 |
| Plum Boro Muni Auth PA5020041 | Allegheny County | ND | ND | 0 |
| Plumstead Northern System PA1090144 | Bucks County | 7.5 | 7.4 | 6 |
| Portage Boro Muni Auth PA4110027 | Cambria County | ND | ND | 0 |
| Pottstown Borough Water Auth PA1460037 | Montgomery County | ND | ND | 4 |
| Quakertown Boro PA1090082 | Bucks County | 10.8 | 14.3 | 8 |
| Radisson Valley Forge Hotel PA1460492 | Montgomery County | 5.4 | 4 | 5 |
| Reading Area Water Authority PA3060059 | Berks County | 6.6 | ND | 5 |
| Red Lion Municipal Authority PA7670086 | York County | ND | ND | 0 |
| Reserve TWP Water Dept PA5020047 | Allegheny County | ND | ND | 0 |
| Richland TWP Water Authority PA1090131 | Bucks County | 7.1 | 8.3 | 7 |
| Richland TWP Water Authority, PA PA5020018 | Allegheny County | ND | ND | 0 |
| Ridgway Borough Water System PA6240012 | Elk County | ND | ND | 0 |
| Roamingwood Sewer and Water PA2640025 | Wayne County | ND | ND | 0 |
| Robinson TWP Muni Auth PA5020045 | Allegheny County | ND | ND | 0 |
| Rockview PA4140098 | Centre County | ND | 5.1 | 1 |
| Rockwood Boro Muni Auth PA4560020 | Somerset County | ND | ND | 0 |
| SWT Main System PA3390065 | Lehigh County | 4 | ND | 3 |
| Salisbury TWP Water System PA3390062 | Lehigh County | 4.5 | 4.2 | 5 |
| Schuylkill Co Mun Auth PA3540038 | Schuylkill County | ND | ND | 0 |
| Schuylkill Haven Boro Water PA3540041 | Schuylkill County | ND | ND | 0 |
| Schwenksville Borough Auth PA1460042 | Montgomery County | 5.4 | 8.3 | 3 |
| Selinsgrove Mun Waterworks PA4550005 | Snyder County | ND | ND | 0 |
| Seneca & Cranberry Mall Dist PA6610031 | Venango County | ND | ND | 0 |
| Seven Springs Muni Auth PA4560024 | Somerset County | ND | ND | 0 |
| Sewickley Boro Water Auth PA5020050 | Allegheny County | ND | ND | 5 |
| Sharpsville Boro Water Co PA6430055 | Mercer County | ND | ND | 1 |
| Shenandoah Mun Water Authority PA3540044 | Schuylkill County | ND | ND | 1 |
| Shillington Muni Auth PA3060067 | Berks County | ND | ND | 3 |
| Shippensburg Boro Water Auth PA7210043 | Cumberland County | ND | ND | 0 |
| Shohola Falls Trails End Sys#2 PA2520941 | Pike County | ND | ND | 0 |
| Shrewsbury Borough PA7670088 | York County | 5.9 | 11.2 | 8 |
| Skyview Gardens Heights Apts PA7500030 | Perry County | ND | ND | 0 |
| Slatington Borough Water Sys PA3390039 | Lehigh County | ND | ND | 0 |
| Slippery Rock Muni Auth PA5100079 | Butler County | ND | ND | 0 |
| Somerset Boro Muni Water Auth PA4560042 | Somerset County | ND | ND | 0 |
| Somerset TWP Muni Auth Oakridg PA4560046 | Somerset County | ND | ND | 0 |
| South Middleton TWP Water Auth PA7210050 | Cumberland County | ND | ND | 1 |
| Southwestern Cambria Cnty Auth PA4110041 | Cambria County | ND | ND | 0 |
| Southwestern PA Water Auth PA5300017 | Greene County | ND | ND | 0 |
| Spring TWP Water Authority PA4140118 | Centre County | ND | ND | 1 |
| Springdale Boro Water Dept PA5020053 | Allegheny County | ND | ND | 1 |
| St Marys Area Water Auth PA6240016 | Elk County | ND | ND | 0 |
| State College Boro Water Auth. PA4140096 | Centre County | ND | ND | 0 |
| State Correctional Inst PA7210046 | Cumberland County | ND | 5.3 | 4 |
| Stewartstown Boro Water Auth PA7670062 | York County | 4.6 | 4.1 | 5 |
| Suburban Lock Haven Water Auth PA4180049 | Clinton County | ND | ND | 0 |
| Suez Mechanicsburg PA7210028 | Cumberland County | 7.1 | 11.4 | 6 |
| Suez Middletown PA7220038 | Dauphin County | 7.5 | 12.7 | 8 |
| Suez Newberry System PA7670061 | York County | 10 | 10 | 8 |
| Suez Water PA PA7220015 | Dauphin County | ND | ND | 3 |
| Suez Water PA Bethel PA1230012 | Delaware County | 22.3 | ND | 7 |
| Suez Water PA Dallas PA2400076 | Luzerne County | 4.1 | 7.9 | 5 |
| Suez Water PA Inc Bloomsburg PA4190008 | Columbia County | ND | ND | 0 |
| Summit Township Water Authorit PA6250090 | Erie County | ND | ND | 0 |
| Tamaqua Area Water Authority PA3540012 | Schuylkill County | ND | ND | 0 |
| Tarentum Boro Water Dept PA5020055 | Allegheny County | ND | ND | 0 |
| Telford Borough Authority PA1460050 | Montgomery County | 14.9 | 15.2 | 9 |
| Titusville Municipal Water PA6200051 | Crawford County | ND | 5.7 | 1 |
| Tobyhanna Army Depot PA2450053 | Monroe County | ND | ND | 0 |
| Towanda Municipal Authority PA2080029 | Bradford County | ND | ND | 0 |
| Tri Cnty JT Muni Auth PA5630045 | Washington County | ND | ND | 0 |
| Tunkhannock Boro Munic Auth PA2660014 | Wyoming County | 4.8 | 6.6 | 4 |
| Tyrone Boro Water Auth PA4070021 | Blair County | ND | ND | 0 |
| Union City Municipal Authority PA6250064 | Erie County | ND | ND | 0 |
| Upmc Magee Womens Hospital PA5020883 | Allegheny County | ND | ND | 1 |
| Upmc Montefiore PA5020806 | Allegheny County | ND | ND | 0 |
| Upmc Presbyterian PA5020808 | Allegheny County | ND | ND | 0 |
| Upmc Shadyside Hillman Campus PA5020898 | Allegheny County | ND | ND | 0 |
| Upper Hanover Water Authority PA1460036 | Montgomery County | 6.2 | 5.5 | 4 |
| Upper Leacock Township PA7360140 | Lancaster County | 8.1 | 9.5 | 8 |
| Upper Saucon TWP Water Supply PA3390077 | Lehigh County | ND | ND | 1 |
| Upper Southampton Mun Auth PA1090063 | Bucks County | 14.2 | 16.4 | 8 |
| VA Pittsburgh UD PA5020955 | Allegheny County | ND | ND | 0 |
| Warminster Municipal Authority PA1090069 | Bucks County | ND | ND | 2 |
| Warwick TWP Lititz Sys PA7360116 | Lancaster County | ND | ND | 3 |
| Warwick TWP Water & Sewer Auth PA1090127 | Bucks County | 7.6 | 7.1 | 8 |
| Washington TWP Muni Auth PA7280026 | Franklin County | ND | ND | 0 |
| Washington TWP Water System PA6250092 | Erie County | ND | ND | 0 |
| Waterford Municipal Authority PA6250065 | Erie County | ND | ND | 0 |
| Wellsboro Municipal Authority PA2590042 | Tioga County | ND | ND | 0 |
| Wernersville Muni Water Auth PA3060076 | Berks County | 4.2 | ND | 4 |
| West Cnty Muni Auth-Mckeesport PA5020025 | Allegheny County | ND | ND | 0 |
| West Earl Water Authority PA7360143 | Lancaster County | ND | ND | 1 |
| West Manchester TWP Auth PA7670101 | York County | 6.3 | 11.1 | 6 |
| West Reading Boro Water PA3060078 | Berks County | 4.2 | ND | 4 |
| West View Water Authority PA5020043 | Allegheny County | ND | ND | 0 |
| Western Allegheny County Mun A PA5020034 | Allegheny County | ND | 5.2 | 2 |
| Whitehall TWP Authority PA3390081 | Lehigh County | 4.9 | 5.4 | 8 |
| Wilkinsburg-Penn JT Water Auth PA5020056 | Allegheny County | ND | ND | 0 |
| Williamsport Mun Water Auth PA4410173 | Lycoming County | ND | 5.1 | 5 |
| Windber Area Auth PA4560013 | Somerset County | ND | ND | 0 |
| Womelsdorf Robesonia JT Auth PA3060080 | Berks County | ND | ND | 0 |
| Wrightsville Boro Muni Auth PA7670097 | York County | ND | ND | 1 |
| Wyomissing Boro Water System PA3060083 | Berks County | 4.7 | ND | 5 |
| York Water Co PA7670100 | York County | ND | ND | 0 |
| Zelienople Boro PA5100093 | Butler County | 4.2 | ND | 5 |
ND = not detected (below the 4 ppt UCMR 5 reporting level). Values are the highest single sample result, not an annual average.