The public water system record for GU Waterworks Authority - Northern System, serving thousands of connections, reports no detections of 1,2,3-trichloropropane (1,2,3-TCP) above the reporting limit from 185 samples taken between 2013 and 2015. This federal occurrence monitoring program does not set enforceable limits but documents presence in the water supply system over time.
Comparing GU’s 1,2,3-TCP Record With Neighboring Areas Without Overreading
Residents often wonder how their water compares to nearby counties. EPA's unregulated contaminant monitoring measures 1,2,3-TCP in multiple public water systems to provide a snapshot of occurrence. For GU, the absence of detectable 1,2,3-TCP in all 185 samples contrasts with some neighboring regions where minor detections have been recorded, though none at levels tied to health limits. It is important not to assume that neighboring detections reflect conditions in a single home or well—individual water tests are necessary for site-specific information.
How Fleck 1,2,3-TCP Filter Technology Removes or Neutralizes 1,2,3-TCP
Though GU’s public water data shows no detectable 1,2,3-TCP, households choosing water treatment equipment to address this compound benefit from Fleck System technology designed for this purpose. The Fleck 1,2,3-TCP Filter uses specialized filtration media that adsorb or break down this chemical, reducing any potential trace amounts that could occur in a home’s water supply, especially those on private wells or sources not covered by public monitoring.
Reading the Record’s Median and Range as a GU Homeowner
With no samples detecting 1,2,3-TCP above 0.03 micrograms per liter in GU’s system, the median is effectively zero, and no range of concentrations is reported. This means the public water supply consistently measured no presence within the detection limits over the tested period. This record reflects the system’s source and treatment but not individual taps. Homeowners seeking assurance should obtain a certified laboratory test for their specific water source.
Sample Size and Its Implications for GU’s 1,2,3-TCP Record
The 185 samples represent a substantial monitoring effort by EPA within this system, providing a robust overview of 1,2,3-TCP occurrence in public water. A smaller number of samples could mean less confidence in the absence of detection, but this size indicates strong evidence of consistent non-detection during the period. However, the monitoring does not cover private wells or plumbing materials which can influence water quality at point of use.
The Role of Plumbing Material and Age Separate From GU’s Source Water
While GU’s water source and distribution system show no detectable 1,2,3-TCP, household plumbing materials and system age can affect water quality independently. Certain plastics, solder, and pipe materials may introduce or adsorb chemicals. Testing at the tap is the only way to determine individual water conditions, as public system data does not reflect these variables.
For homeowners in GU weighing treatment options for 1,2,3-TCP, using the Fleck 1,2,3-TCP Filter provides a ready-to-configure solution designed to meet their measured daily water demand, ensuring targeted reduction of this chemical whenever detected in residential water supplies.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2015-12-13. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR3 monitoring (2013-2015) for GU Waterworks Authority - Northern System (GU0000006), GU: 185 results across 1 listed contaminants, 0 detections above the reporting level; nothing detected above the method reporting level
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