Did your existing water treatment equipment stop controlling PFAS in your home water? You’re not alone. Pulaski County’s public water system data can shed light on what’s in the water supply, while pointing to a documented path forward.

If you want to understand why a granular carbon bed and an ion-exchange resin treat PFAS differently

Granular activated carbon beds work by adsorbing certain PFAS molecules onto their surface during water passage. They are effective mainly for long-chain compounds like PFOA and PFOS. Ion-exchange resins work differently: they chemically swap PFAS ions in water with other ions on the resin’s surface, often targeting shorter-chain and a broader range of per- and polyfluoroalkyl substances. The documented Pentair System combines technologies optimized for this range of fluorinated compounds, capturing more effectively what may be present in local water.

If you want to know which fluorinated compounds now have federal MCLs and which do not

In 2024, the U.S. Environmental Protection Agency established federal maximum contaminant levels (MCLs) for six PFAS chemicals, including PFOA and PFOS at 4.0 nanograms per litre (ng/L, also called parts per trillion). Other compounds like PFHxS, PFNA, and PFBS also have MCLs. According to the Fort Leonard Wood public water system data for Pulaski County, no detections exceeded these MCLs in 2023–2025. Some PFAS were detected at very low levels, but none crossed the thresholds set by the EPA.

If you need to understand why PFOA and PFOS concentrations are expressed in nanograms per litre and what four decimals signify

Nanograms per litre corresponds to parts per trillion—an extremely small concentration unit essential for measuring PFAS because these chemicals can affect health even at trace amounts. The four decimal places in reporting levels reflect the precision of modern instruments, detecting down to a fraction of one part per trillion. This precision helps identify even minute quantities of "forever chemicals" in public water systems, supporting informed water treatment decisions.

If you want to learn how these fluorinated compounds enter groundwater or the distribution system in Pulaski County

The local water source for Fort Leonard Wood in Pulaski County is surface water, which can be influenced by environmental presence of PFAS from industrial uses, firefighting foams, consumer products, or runoff. These compounds may migrate from soil and groundwater into the water distribution system. Detection in public water means monitoring captures what could enter household taps, though individual well water may vary.

If you want to interpret terms like "detected," "median," and "range" in this sampling record

• Detected: indicates the chemical was measured at or above the instrument’s reporting level, not a violation or unsafe level.
• Median: the middle value of detections, helping to understand typical concentrations among all samples.
• Range: the span from the lowest to highest detected values across samples.

For example, PFBS was detected once above its reporting level with a measurement of 0.0048 µg/L (4.8 ng/L), but this remains below the federal MCL of 10 ng/L, indicating measured presence but not a health-based violation.

If you want to know how your tap water changes once the documented technology is used

The Pentair PFAS Forever Chemicals Filter uses a system designed specifically to reduce PFAS concentrations in household water effectively. By combining granular carbon and ion-exchange resin media, it targets a broad range of fluorinated compounds found at trace levels locally. Water treated through this technology typically shows significantly lower PFAS presence, improving peace of mind after equipment failure.

To confirm your household water quality and the need for treatment, you should order a certified laboratory PFAS test specific to your home’s water supply. A test result showing concentrations below EPA MCLs would indicate no immediate federal health concern, while higher results can guide use of a system like the Pentair filter.

Understanding your water helps you take measured action. While Pulaski County’s public water has not recorded health-based PFAS violations, individual water quality varies. Testing and documented treatment technology provide the best approach to ensure water quality after equipment issues.

Where this information comes from

Source: EPA SDWIS public water system record. Sampled 2025-06-11. These figures describe the public water system's record, not the plumbing inside any individual building.

On record: EPA UCMR5 monitoring (2023-2025) for FORT LEONARD WOOD (MO3079500), MO: 320 results across 10 listed contaminants, 1 detections above the reporting level; compared with the applicable federal MCL, none above