Not All Detections Mean PFAS Contamination Is Present in Your Home Water
In Pierce County, Washington, some may worry about the presence of per- and polyfluoroalkyl substances (PFAS), also known as "forever chemicals," in their water. It is important to understand that detecting PFAS in public water system monitoring does not mean the water is unsafe or violates federal health standards. For the Peacock Hill public water system serving this area, recent federal monitoring under the UCMR5 program shows no health-based violations recorded by the EPA. This public water system, which draws groundwater to serve over 7,400 residents, has conducted extensive PFAS testing as part of national efforts to understand these compounds' occurrence.
Sources of PFAS: Which Are Relevant to Pierce County's Water Record?
PFAS compounds commonly come from sources such as firefighting foam, textile finishing, and landfill leachate. In Pierce County's Peacock Hill system, groundwater samples did detect some PFAS compounds, but at very low levels and mostly below federally established maximum contaminant levels (MCLs) effective in 2024. There is no indication from the monitoring data that widespread contamination from industrial or landfill sources affects this system's water supply to a degree exceeding health standards.
Which PFAS Compounds Are Regulated Now, and What Does That Mean Here?
Among PFAS compounds, federal MCLs established for 2024 specifically cover PFOA, PFOS, PFHxS, PFNA, and HFPO-DA. In the Peacock Hill record, no PFOA or PFOS was detected above reporting levels, and PFHxS detections above the reporting level were rare and well below the MCL. Other detected PFAS such as PFBS, PFHxA, PFPeA, PFBA, and PFHpA currently lack federal MCLs but are monitored to track trends and support future regulation decisions.
How to Understand This Record Compared to Neighboring Areas Without Overreading the Data
Comparing PFAS results from nearby counties must be done cautiously. Detection frequencies and levels vary naturally with differences in source water and contamination events. Since this data involves one public water system's groundwater supply in Pierce County, it does not predict the presence or absence of PFAS in your private well or indoor plumbing. Only a direct water test on your household supply can provide specific information about your water quality.
What Steps Should You Take Before Choosing a Treatment Class?
The most cost-effective first step is to obtain laboratory testing specific to your water source, particularly if your home uses a private well. Testing should include the regulated PFAS compounds to confirm actual concentrations relative to federal standards. This information is essential for assessing the need for specialized filtration or treatment targeting PFAS.
How PFAS Enter Groundwater and Distribution in This Region
Fluorinated compounds from industrial activities, firefighting materials, or landfill seepage can migrate into groundwater over time. In public water systems like Peacock Hill, treatment and source protection measures aim to maintain water quality within regulatory limits. Distribution system materials may also influence water quality but are not known to introduce PFAS compounds.
The Single Test to Resolve Your PFAS Questions
To conclusively understand whether your household water requires treatment for PFAS, order a comprehensive water test from a qualified laboratory that measures the federally regulated PFAS compounds at nanograms per liter (parts per trillion) levels. If concentrations are within federal MCLs, no additional PFAS-specific treatment is typically needed.
Should you want to pursue targeted reduction of PFAS, systems such as the C-Series PFAS Forever Chemicals Filter ship ready to configure and are designed to reduce these compounds effectively. This technology works for residential settings aiming to address detected PFAS at low concentrations while providing clarity for homeowners considering their treatment options.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2024-10-15. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR5 monitoring (2023-2025) for PEACOCK HILL (WA5366637), WA: 520 results across 10 listed contaminants, 12 detections above the reporting level; 2 results above a 2024 federal MCL