The public water serving Hempstead (T), Lynbrook (V), and surrounding areas in Nassau County comes from groundwater sources managed by New York American Water - Lynbrook system. This system supplies water to over 220,000 residents through more than 74,000 connections. The water undergoes routine monitoring including assessments for per- and polyfluoroalkyl substances (PFAS), a group of fluorinated compounds often called "forever chemicals" because of their persistence in the environment.
What types of local sources contribute PFAS detections in this region?
PFAS compounds in groundwater often originate from historical uses such as firefighting foam, applications in textile finishing, and contamination from landfills. In Nassau County, these are the typical sources considered when evaluating public water data. The New York American Water - Lynbrook system reflects this background, with detection results likely influenced by such regional industrial and waste sites, consistent with patterns observed in similar urbanized groundwater systems.
Why are PFOA and PFOS levels shown in nanograms per litre with four decimal places?
PFAS compounds such as PFOA and PFOS are measured at extremely low concentrations due to their potential persistence and bioaccumulation. Reporting in nanograms per litre (ng/L), equivalent to parts per trillion (ppt), requires precise instruments that detect down to four decimal places. For example, a level recorded as 0.0051 µg/L equals 5.1 ng/L or 5.1 ppt. This precision helps regulatory agencies and water managers understand the extent of presence relative to health advisory or future maximum contaminant levels (MCLs) established by the EPA.
How can a homeowner interpret the system’s median and range of PFAS detections?
Reviewing the New York American Water - Lynbrook system data, PFOA was not detected above the 0.004 µg/L reporting level in any test. One PFOS detection registered slightly above the reporting level at 0.0051 µg/L (5.1 ng/L), which is just above its detection threshold but well below the upcoming EPA MCL of 4.0 ng/L (4 parts per trillion). Other PFAS compounds like PFHxS and PFNA showed occasional detections above minimal reporting levels but consistently below their proposed federal MCLs. This means while these fluorinated chemicals are measurable in some samples, their concentrations remain considerably low on a parts-per-trillion scale, and no current violations for PFAS are on record for this public water system.
What should be checked first and what tests confirm household water quality regarding PFAS?
Households experiencing concerns that their current water treatment cannot keep up with PFAS removal may start by reviewing public water quality reports for their area, such as those published by New York American Water - Lynbrook. Next, targeted laboratory testing of individual household water samples is essential to understand personal exposure levels precisely, since system-wide data cannot confirm a home's specific water quality. Laboratories offer PFAS analyses that cover compounds like PFOA, PFOS, PFHxS, and PFNA. This step ensures tailored decision-making before upgrading treatment options.
How will water at the tap change after using the Fleck PFAS Forever Chemicals Filter?
The Fleck PFAS Forever Chemicals Filter employs specialized adsorption technology designed to reduce per- and polyfluoroalkyl substances effectively from household water. Once configured, this system targets the 'forever chemicals,' lowering them to levels substantially below detection thresholds commonly reported in regional water systems. This means users can expect drinking and cooking water with significantly diminished levels of PFAS, supporting peace of mind where existing equipment struggles to maintain removal performance.
In summary, the public water system serving Hempstead and Lynbrook shows measurable but very low levels of various PFAS compounds. Homeowners should confirm their water’s specific PFAS content through laboratory testing and consider advanced filtering solutions like the Fleck PFAS Forever Chemicals Filter to address persistent fluorinated compounds effectively.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2025-07-15. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR5 monitoring (2023-2025) for NEW YORK AMERICAN WATER - LYNBROOK (NY2902835), NY: 350 results across 10 listed contaminants, 4 detections above the reporting level; 1 results above a 2024 federal MCL
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