Why a Low-Level Detection of 1,4-Dioxane Is Reported to Three Decimal Places and What Precision Means Here
The water serving Lihue-Kapaa, Kauai County, comes primarily from surface water sources treated and distributed by the public water system serving nearly 35,000 residents. Monitoring of 1,4-dioxane—the cyclic ether commonly used as a solvent stabiliser—occurs at very low concentrations, measured in micrograms per litre (µg/L), equivalent to parts per billion (ppb). The detection limit for this contaminant in the 2013-2015 EPA Unregulated Contaminant Monitoring Rule (UCMR3) was 0.07 µg/L. Values reported with three decimal places reflect the sensitivity and precision of testing instruments capable of quantifying trace levels in this range. These precise measurements help public systems understand the presence and range of 1,4-dioxane, even when levels are far below any health-based benchmarks.
How to Judge Treatment Capacity Against Your Household’s Daily Water Demand
While public water records show occasional detections of 1,4-dioxane in Lihue-Kapaa’s supply—four detections out of 45 tests, with the highest at 0.12 µg/L—the absence of federal maximum contaminant levels means no regulatory threshold exists. To evaluate whether additional treatment is needed at a household scale, consider daily water usage: an average home uses several hundred gallons per day. Treatment equipment designed to address the solvent stabiliser must have the capacity to process this volume effectively. The Fleck 1,4-Dioxane Filter, for example, ships ready to configure and is engineered to handle typical household flow rates, making it possible to customize based on individual demand levels.
How to Compare Lihue-Kapaa’s 1,4-Dioxane Record With a Neighboring County’s Without Overreading It
Comparing 1,4-dioxane data between Kauai County and adjacent counties requires attention to the scope and sampling context. Lihue-Kapaa’s public water system samples covered 45 measurements over a multi-year period, reflecting localized surface water factors and treatment methods. Neighboring areas may rely on different water sources or sampling frequencies. Differences in detection frequency or concentration do not by themselves signify better or worse water quality. Such data is a snapshot of one system’s monitoring results and should not be generalized without parallel datasets collected under similar conditions.
Maintenance Rhythm of the Documented Technology in Plain Terms
The Fleck 1,4-Dioxane Filter uses proven technology to reduce the cyclic ether in household water supplies. Its operation depends on periodic media regeneration or replacement to maintain effectiveness. Homeowners can plan maintenance intervals based on water consumption and filter performance indicators, with replacement schedules typically ranging from several months to a year. This rhythm ensures continuous addressing of solvent stabiliser levels without complicated upkeep. The unit ships ready to configure, enabling straightforward integration into existing water pathways without the need for specialized service professionals.
What a Certified Laboratory Test for 1,4-Dioxane Reports and How to Read It
To determine an individual household’s water quality regarding the solvent stabiliser 1,4-dioxane, laboratory testing is required. Certified laboratories use precise analytical methods capable of detecting concentrations down to or below 0.07 µg/L. Results include concentration values in micrograms per litre or parts per billion. Homeowners should focus on the detected amount and understand that detection does not imply a violation or immediate health risk, especially since there is no federal maximum contaminant level for this chemical. Comparing results against the EPA’s reference concentration of 0.35 µg/L for cancer risk can provide context but does not establish regulatory compliance requirements.
What Happens When 1,4-Dioxane Is Left Untreated for Years, Stated Without Exaggeration
Long-term exposure to low levels of 1,4-dioxane in drinking water, even below the EPA’s cancer risk reference concentration, may raise concerns for some homeowners due to the chemical’s persistence and mobility in water. However, the Lihue-Kapaa system has recorded no health-based violations for this contaminant, indicating routine treatment and natural dilution limits risk. At household level, untreated solvent stabiliser buildup could affect water quality aesthetics or raise personal precautionary considerations. Selecting appropriate treatment equipment like the Fleck product can help minimize lingering presence, ensuring water quality aligns with homeowner expectations over time.
Closing Summary and Government Data Source
The Lihue-Kapaa public water system in Kauai County serves over 11,000 connections using surface water sources. EPA monitoring from the 2013-2015 UCMR3 reveals occasional detections of 1,4-dioxane at low microgram-per-litre levels without recorded health-based violations. Understanding these precise detections requires careful interpretation, confirmed household testing, and consideration of treatment capacity aligned with daily water needs. The Fleck 1,4-Dioxane Filter offers a documented approach to managing the cyclic ether within residential water systems. For complete details and official government data, please consult the EPA’s Safe Drinking Water Information System records.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2015-07-31. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR3 monitoring (2013-2015) for Lihue-Kapaa (HI0000400), HI: 45 results across 1 listed contaminants, 4 detections above the reporting level; no federal MCL; EPA cancer risk reference concentration 0.35 ug/L
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