How many Pennsylvania water systems are over the federal PFAS limit?

119 public water systems in Pennsylvania had at least one PFAS above a federal maximum contaminant level in EPA UCMR 5 testing (2023–2025). Each one is listed on this page with its actual levels and the filter that removes them.

PFAS in Pennsylvania water

The EPA tested public water systems across Pennsylvania for 29 PFAS. In 119 of them, at least one came back above a federal limit. Find your system below — you'll get the actual levels, our plain verdict on each compound, and the filter that genuinely removes it. We sell nothing.

Not listed? Your system may not have been sampled, or nothing exceeded a limit — see the national picture.

Akron Borough 2 over the limit
Ambler Boro Water Dept 3 over the limit
Aqua Pa Bensalem 2 over the limit
Aqua Pa Bristol 1 over the limit
Aqua Pa Chalfont 2 over the limit
Aqua Pa Flying Hills Wa Sys 2 over the limit
Aqua Pa Friendship 2 over the limit
Aqua Pa Hatboro 2 over the limit
Aqua Pa Main System 3 over the limit
Aqua Pa Perkiomen Township 2 over the limit
Aqua Pa Spring Run 2 over the limit
Aqua Pa Superior Main System 2 over the limit
Aqua Pa Uwchlan 2 over the limit
Aqua Pa West Chester 1 over the limit
Ashland Area Water Authority 1 over the limit
Audubon Water Company 2 over the limit
Bcwsa Main Lower South 2 over the limit
Beaver Boro Muni Auth 3 over the limit
Beaver Falls Muni Auth 1 over the limit
Brighton Twp Muni Auth 1 over the limit
Buckingham Twp Cold Spring 2 over the limit
Bucks County Community College 1 over the limit
Caernarvon Twp Auth 1 over the limit
Carlisle Water Trmt Plt 2 over the limit
Chester Water Authority 1 over the limit
City Of Lancaster, Pa 1 over the limit
Collegeville Trappe Joint Pwd 2 over the limit
Coraopolis Water & Sewer Auth 3 over the limit
Dillsburg Area Authority 2 over the limit
Dover Twp Water Sys 2 over the limit
Downingtown Water Authority 1 over the limit
Doylestown Boro Water Dept 2 over the limit
Dtma Main System 2 over the limit
Eagle Lake Community Assoc 1 over the limit
East Cocalico Township 2 over the limit
East Hempfield Water Auth 2 over the limit
East Petersburg Borough 2 over the limit
Eei Meadows Complex 1 over the limit
Elizabethtown Area Water 1 over the limit
Emmaus Borough Public Water 4 over the limit
Ephrata Area Joint Authority 2 over the limit
Freeland Boro Muni Water Auth 2 over the limit
Gettysburg Muni Auth 2 over the limit
Highridge Water Auth 2 over the limit
Hilltown Twp Water&Sewer Auth 2 over the limit
Horsham Water&Sewer Authority 3 over the limit
Jamie Hollanders 2 over the limit
Kennett Square Mun Water Works 2 over the limit
Lca Allentown Division 1 over the limit
Lca Wlsa Central Division 1 over the limit
Lehman Jackson Elementary 3 over the limit
Littlestown Boro 2 over the limit
Manheim Area Water & Sewer Aut 2 over the limit
Manheim Auto Auction 1 over the limit
Masonic Homes 1 over the limit
Millersburg Water Auth 2 over the limit
Millersville Univ 2 over the limit
Monaca Boro Water Dept 1 over the limit
Montoursville Water Company 2 over the limit
Moon Twp Muni Auth 1 over the limit
Mt Hope Est & Winery 1 over the limit
Mt Penn Boro Muni Auth 1 over the limit
Muhlenberg Twp Muni Auth 2 over the limit
N Middleton Water Auth 2 over the limit
New Holland Borough 2 over the limit
New Oxford Munci Auth 2 over the limit
Newtown Artesian Water Co 2 over the limit
North Penn Water Authority 1 over the limit
North Wales Water Authority 2 over the limit
Northampton Bucks Co Mun Auth 2 over the limit
Outlet Shops At Gettysburg 2 over the limit
Oxford Borough 1 over the limit
Pa Am Water Co-Frackville Dist 1 over the limit
Pa Amer Water Co 1 over the limit
Pa Amer Water Co Lake Scranton 2 over the limit
Pa American Royersford 2 over the limit
Pa American Water Berwick 1 over the limit
Pa American Water Co West 2 over the limit
Pa American Water Co Yardley 2 over the limit
Palmerton Municipal Authority 4 over the limit
Paradise Stream Resort Well 2 1 over the limit
Paw Glen Alsace Div 2 over the limit
Paw Penn District 3 over the limit
Pawc Pocono District 2 over the limit
Perkasie Regional Authority 2 over the limit
Philadelphia Water Department 2 over the limit
Phoenixville Water Dept 2 over the limit
Pittsburgh Intl Airport 1 over the limit
Plumstead Northern System 2 over the limit
Quakertown Boro 3 over the limit
Radisson Valley Forge Hotel 1 over the limit
Reading Area Water Authority 1 over the limit
Richland Twp Water Authority 2 over the limit
Rockview 1 over the limit
Salisbury Twp Water System 2 over the limit
Schwenksville Borough Auth 2 over the limit
Shrewsbury Borough 2 over the limit
State Correctional Inst 1 over the limit
Stewartstown Boro Water Auth 2 over the limit
Suez Mechanicsburg 2 over the limit
Suez Middletown 2 over the limit
Suez Newberry System 2 over the limit
Suez Water Pa Bethel 1 over the limit
Suez Water Pa Dallas 2 over the limit
Telford Borough Authority 2 over the limit
Titusville Municipal Water 1 over the limit
Tunkhannock Boro Munic Auth 2 over the limit
Upper Hanover Water Authority 2 over the limit
Upper Leacock Township 2 over the limit
Upper Southampton Mun Auth 2 over the limit
Warwick Twp Water & Sewer Auth 2 over the limit
Wernersville Muni Water Auth 1 over the limit
West Manchester Twp Auth 1 over the limit
West Reading Boro Water 1 over the limit
Western Allegheny County Mun A 1 over the limit
Whitehall Twp Authority 2 over the limit
Williamsport Mun Water Auth 1 over the limit
Wyomissing Boro Water System 1 over the limit
Zelienople Boro 1 over the limit

Source: US EPA UCMR 5 occurrence data, 2023–2025. · All states