Federal MCLs for Fluorinated Compounds in Bucks County Public Water
The public water system serving parts of Bucks County, PA, specifically NWWA Warrington Township (PA1090070), reports detections of several per- and polyfluoroalkyl substances (PFAS) from 2023 to 2025 monitoring. Federal Maximum Contaminant Levels (MCLs), effective in 2024, apply to PFOA at 4.0 nanograms per litre (ng/L) and PFOS at 4.0 ng/L, among others. No measurements for PFOA, PFOS, PFHxS, PFNA, or HFPO-DA have been detected above their respective reporting levels or MCLs for this system. Detections of PFBA occurred twice, with values below any federal MCLs, indicating presence at very low concentrations.
Interpreting Nanograms per Litre in Context of PFAS
PFOA and PFOS concentrations are reported in nanograms per litre, equivalent to parts per trillion (ppt), to reflect their extremely low presence in water. Four decimal places in measurement denote precision at levels as small as thousandths of a nanogram, essential for tracking these 'forever chemicals' because even tiny quantities are scrutinized. This precision assists regulators and water managers in monitoring but does not itself indicate a health risk without further context.
Differences Between Public Water System Records and Private Well Testing
The EPA record for the public system represents broad water quality based on large-scale monitoring of surface water sources and treatment before distribution. It does not reflect conditions at individual taps or private wells, which may vary due to local factors. To know the exact levels of PFAS in a home's water, specific testing of that water source is necessary. Public system data provides regional background but cannot substitute for household-level water analysis.
Distinguishing PFAS from Other Common Water Issues
PFAS are fluorinated compounds persistent in the environment and distinct from other water quality challenges like hardness or iron staining. They do not cause aesthetic issues typical of minerals or metal ions. Misattributing common household water problems to PFAS can lead to misunderstandings. Testing targeted specifically at PFAS is required to confirm their presence and concentration in drinking water.
How the C-Series PFAS Forever Chemicals Filter Treats These Substances
The C-Series PFAS Forever Chemicals Filter uses specialized technology designed to reduce or remove a range of fluorinated compounds from household water. By targeting these 'forever chemicals,' it helps mitigate their presence after water leaves the public system and before it is used in the home. The system ships ready to configure, providing a practical way to address PFAS concerns indicated by regional water data or confirmed by private testing.
What You Should Not Conclude: The Bucks County public water monitoring shows PFAS compounds at or below federal detection thresholds and well below MCLs. This regional data does not prove that any individual home’s water contains PFAS at these levels or at all. Only direct testing of your own water can establish your household’s situation. The presence of low-level PFAS detections in the public system record does not indicate water is unsafe or in violation of federal standards.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2025-10-22. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR5 monitoring (2023-2025) for NWWA WARRINGTON TOWNSHIP (PA1090070), PA: 400 results across 10 listed contaminants, 2 detections above the reporting level; compared with the applicable federal MCL, none above