Pentair PFAS Forever Chemicals Filter

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What EPA Sampling Shows About PFAS Levels in Roanoke City's Water System

Public water system record for Western Virginia Water Authority

The Western Virginia Water Authority (CWS VA2770900) supplies surface water to Roanoke City, serving 182,700 people via 67,598 connections. EPA data from the 2023-2025 Unregulated Contaminant Monitoring Rule (UCMR5) shows some detections of PFAS compounds, specifically PFOA and PFOS, within this system.

Reported PFAS measurements

• PFOA detected once above 0.004 µg/L (4 ng/L) at 0.0089 µg/L (8.9 ng/L).
• PFOS detected six times above 0.004 µg/L (4 ng/L), highest at 0.0063 µg/L (6.3 ng/L).
• Other measured PFAS compounds such as PFHxS, PFNA, and HFPO-DA showed no detections above their reporting levels or federal MCLs.

Why PFOA and PFOS Are Measured in Nanograms Per Liter and What Four Decimal Places Mean

Units and precision in PFAS testing

PFAS concentrations are reported in micrograms per liter (µg/L), often expressed in nanograms per liter (ng/L) for precision. One µg/L equals 1,000 ng/L or one part per billion; four decimal places mean detection at parts per trillion (ppt) levels. For example, 0.004 µg/L equals 4 ng/L or 4 ppt. This precision allows detection of very low concentrations relevant to health guidelines.

Health-based maximum contaminant levels (MCLs)

Recent federal MCLs for PFOA and PFOS are set at 4 ng/L (4 ppt) to guide water quality standards starting in 2024. EPA measurements in Roanoke City show some samples exceeding these levels, which are not compliance violations here but indicate the presence of fluorinated compounds at these low parts per trillion concentrations.

How the UCMR5 Survey Differs from UCMR3 in Compounds and Detection Levels

Expanded PFAS compound list

Compared to UCMR3, UCMR5 includes more PFAS compounds, such as HFPO-DA, PFHxA, PFPeA, and PFHpA, in addition to PFOA and PFOS. This broader scope provides a more detailed profile of "forever chemicals" in public water systems like Roanoke City's.

Lower detection limits and improved sensitivity

UCMR5 uses lower reporting levels, detecting PFAS at concentrations as low as 0.003 to 0.005 µg/L (3 to 5 ng/L), allowing for more accurate identification of trace levels of these fluorinated substances.

Potential Effects When PFAS Are Left Untreated in Household Water Over Years

Accumulation concerns

PFAS, often called "forever chemicals," do not break down easily in the environment or the human body. Extended exposure, even at low levels, may lead to accumulation and is a reason some households seek water treatment options.

Common issues associated with PFAS presence

While aesthetic water quality may not be visibly affected, concerns include the persistence and bioaccumulation potential of these fluorinated compounds, prompting preventative water treatment measures.

How Treated Water Differs at the Tap with the Pentair PFAS Forever Chemicals Filter

Targeted reduction of per- and polyfluoroalkyl substances

The Pentair PFAS Forever Chemicals Filter is designed specifically to reduce a range of PFAS compounds. Water passing through the system shows decreased concentrations of PFOA, PFOS, and related fluorinated substances, improving the overall profile at the tap.

Ease of household use

This filter ships ready to configure, enabling residences to add a treatment layer for PFAS without professional services. The technology focuses on long-lasting filtration of 'forever chemicals.'

Distinguishing PFAS From Commonly Confused Water Issues

PFAS versus general contamination

PFAS are synthetic fluorinated compounds distinct from bacterial or sediment contamination. They are measured at trace nanogram levels rather than properties like turbidity or iron content.

Different from minerals or organic matter

Unlike hardness, dissolved solids, or organic taste concerns, PFAS are chemical substances identified via specialized testing and require specific filtration technology for reduction.

Closing: The Key Test to Clarify Your Household Water's PFAS Status

To understand if your household water contains PFAS and at what levels, a qualified laboratory test targeting individual PFAS compounds at parts per trillion sensitivity is essential. This test result will inform whether a specialized filter like the Pentair PFAS Forever Chemicals Filter aligns with your treatment needs.

Where this information comes from

Source: EPA SDWIS public water system record. Sampled 2024-06-11. These figures describe the public water system's record, not the plumbing inside any individual building.

On record: EPA UCMR5 monitoring (2023-2025) for WESTERN VIRGINIA WATER AUTHORITY (VA2770900), VA: 380 results across 10 listed contaminants, 10 detections above the reporting level; 7 results above a 2024 federal MCL