A laboratory test report for per- and polyfluoroalkyl substances (PFAS) in drinking water typically shows concentrations measured in nanograms per litre (ng/L), equivalent to parts per trillion (ppt). Measurements such as 0.004 µg/L (4 ng/L) reflect four decimal places—indicating the precision necessary to detect even trace amounts of substances like PFOA and PFOS, which are studied due to their persistence in the environment and potential health considerations.
Why PFOA and PFOS Are Measured in Nanograms Per Litre with Four Decimal Places
PFAS compounds are present in extremely low concentrations in water sources, requiring sensitive instruments for detection. Four decimal places in micrograms per litre translate to parts per trillion, a scale essential for accurately monitoring these "forever chemicals." This precision allows regulators and water providers to track trace levels against health-based benchmarks established by the EPA, even when measurements fall well below those levels.
The Order in Which to Rule Things Out, From Cheapest Check to Laboratory Test
Households concerned about PFAS should begin by reviewing public water system records for their area, as these provide the broadest data available without immediate testing costs. The City of York's EPA records show no detections of PFOA, PFOS, or other key PFAS compounds above reporting levels in recent federal monitoring. If residents still experience worries about their individual water, the next step is to obtain laboratory testing of their home's water supply. This confirms the presence or absence of PFAS and other constituents specific to their plumbing and well conditions.
What Questions a Commercial or Industrial Operator Adds That a Household Does Not
Unlike households, commercial and industrial water users often assess PFAS levels in relation to process water needs, compliance with stricter discharge limits, and potential source contamination related to manufacturing or firefighting activities. Households typically focus on drinking water safety and taste, while operators may prioritize broader environmental and regulatory impacts.
What Distinguishes This Problem From the Two Problems Most Often Confused With It
PFAS contamination differs significantly from issues like iron staining or hardness. While iron and hardness affect water clarity, color, or mineral buildup, PFAS compounds are synthetic and do not cause these aesthetic effects. Instead, their concern lies in chemical persistence and potential long-term health evaluation, making specialized treatment methods necessary rather than traditional softening or filtration.
Firefighting Foam, Textile Finishing, and Landfill Sources: Which Fits This Region's Record
The York water system uses groundwater sources and has experienced no PFAS detections above reporting limits in recent EPA UCMR5 monitoring. This suggests limited influence from common PFAS sources such as aqueous film-forming foams (AFFF) used in firefighting, textile manufacturing, or landfill leachate in this area. Ongoing monitoring is prudent, but current data do not indicate localized contamination from these sources statewide.
Which Fixtures, Appliances, or Processes Are Affected First and Why
When PFAS are present at low levels, kitchen faucets and drinking water points are typically the primary concern, as they deliver water directly for ingestion. Appliances like ice makers or coffee machines can accumulate these compounds if present, potentially affecting taste or consumer confidence. Addressing PFAS requires filtration at the point of use with technology proven to reduce fluorinated compounds effectively.
For households in York seeking to manage persistent PFAS issues—especially where existing equipment is insufficient—the C-Series PFAS Forever Chemicals Filter ships ready to configure and uses advanced filtration designed specifically to reduce a range of fluorinated compounds. This system can be considered as part of a comprehensive approach after confirming water quality through testing.
In summary, the City of York's public water system monitoring data from 2023 to 2025 show no PFAS detections above federal reporting levels for all tested compounds. These findings cover water served to over 3,400 connections and more than 8,000 people, derived from groundwater sources. To explore detailed data, consult the EPA's Safe Drinking Water Information System (SDWIS) public records for this system.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2025-08-20. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR5 monitoring (2023-2025) for YORK, CITY OF (NE3118706), NE: 240 results across 10 listed contaminants, 0 detections above the reporting level; nothing detected above the method reporting level