This week you face a choice about your home water treatment: which equipment can best address the presence of PFAS compounds documented in Payson, Gila County's water system?
Myth: The combined PFAS hazard can be summed into a single risk number with health meaning
Government monitoring of Payson’s water system shows multiple fluorinated compounds present, including PFOA, PFOS, PFHxS, and others, often called "forever chemicals". While scientists sometimes calculate a hazard index to estimate combined effects, the current federal data and regulations do not establish a clear health-based total risk number for these mixtures. The EPA’s public water system record for Payson confirms zero health-based violations in 146 tested areas, meaning no legally recognized health issues were found despite detections. This distinction is crucial when considering treatment options.
Myth: PFOA and PFOS measurements reported with nanograms per liter are just insignificant numbers
Measurements of PFOA and PFOS in the range of 0.004 to approximately 0.04 micrograms per liter (µg/L), equivalent to 4 to 40 nanograms per liter (ng/L) or parts per trillion (ppt), reflect extremely low concentrations. The EPA lab methods are precise enough to detect to four decimal places and small concentrations. Even so, results above the reporting level only mean these compounds were measurable, not that they exceed any health standard before 2024. For Payson’s system, many PFAS detections are below the forthcoming federal maximum contaminant levels (MCLs), confirming the importance of understanding measurement sensitivity rather than assuming a hazard from detection alone.
Myth: All fluorinated compounds found in the water have legal limits and health-based maximum contaminant levels
Of the various PFAS compounds identified in Payson’s water reports, PFOA and PFOS have federal MCLs set for 2024 at 4 ng/L, and PFHxS has a 2024 MCL of 10 ng/L. Not all detected compounds have established federal MCLs. For example, PFNA and HFPO-DA had no detections above reporting levels, and compounds like PFBS, PFHxA, PFPeA, PFBA, and PFHpA do not yet carry federal MCLs. This means some fluorinated substances are monitored but not regulated with enforceable limits as of now, which affects how treatment equipment targets them.
Myth: Seasonal and multi-year water testing shows stable PFAS levels without variation
The EPA UCMR5 survey for Payson spans from March 2023 to May 2024, capturing multiple sampling events. Results show that PFAS detections vary over time, with some individual samples registering higher or lower concentrations within the same range. For instance, the highest PFOA reading was 0.0409 µg/L, while median detections were closer to 0.0181 µg/L. This natural fluctuation suggests that a single test can’t definitively represent long-term exposure, underscoring the importance of choosing treatment solutions adaptable to slight changes.
Myth: All PFAS treatment systems work the same, regardless of technology details
Granular activated carbon beds and ion-exchange resins are two documented filtration approaches that address PFAS compounds differently. Granular carbon adsorbs a broad range of PFAS but may have variable longevity depending on compound profile and water chemistry. Ion-exchange resins target specific per- and polyfluoroalkyl substances with high selectivity but may require different operational considerations. Selecting equipment able to reduce the mix of PFAS seen in Payson’s groundwater involves understanding these distinctions and matching technology to your household’s water demand and compound profile.
The most effective step is to order a comprehensive PFAS water analysis specific to your household’s water source. This test should measure individual PFAS compounds with nanogram-level sensitivity. Achieving test results below the EPA’s 2024 federal MCLs for PFOA, PFOS, and PFHxS would indicate minimal PFAS presence. For water with detectable PFAS, the C-Series PFAS Forever Chemicals Filter ships ready to configure and provides a documented approach to reducing these compounds, complementing accurate testing and informed equipment selection.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2024-05-20. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR5 monitoring (2023-2025) for PAYSON TOWN OF (AZ0404032), AZ: 520 results across 10 listed contaminants, 196 detections above the reporting level; 56 results above a 2024 federal MCL