Open with What the Government Sampling Record Shows
The EPA public water system record for Frankfort, Will County, Illinois, serving over 24,000 people, shows no detections of 1,4-dioxane above 0.07 micrograms per liter (µg/L) in 18 samples taken from 2014 to 2015, with no health-based violations reported.
1. Why a Low-Level Detection is Reported to Three Decimal Places and What Precision Means Here
The EPA reports 1,4-dioxane results with precision to the hundredth of a microgram per liter because it is a trace-level contaminant. This precision allows regulators to detect very small amounts, even though such low concentrations do not imply any violation or unsafe condition. The figures reflect instrument sensitivity, not a health hazard threshold.
2. How Reverse Osmosis Rejection Rates Are Stated and Why a Percentage Is Not a Guarantee
Reverse osmosis (RO) is a common treatment method sometimes used to address cyclic ethers like 1,4-dioxane. RO rejection rates are often expressed as percentages, indicating how much of the constituent is reduced relative to the feed water. However, these percentages depend on specific operating conditions and water chemistry, so a stated rejection percentage does not guarantee the same performance in every household or water situation.
3. What the Measured Range Means Against the Relevant Federal Standard, and What It Does Not Mean
The detected 1,4-dioxane levels in Frankfort's water system fall below EPA’s cancer risk reference concentration of 0.35 µg/L (0.35 parts per billion). This indicates that, as measured, the solvent stabilizer is present at very low or undetectable concentrations, well within safety margins established by federal guidelines. It does not mean that any individual household water is tested or guaranteed to be free of 1,4-dioxane without a specific analysis.
4. What Happens When This Problem is Left Untreated for Years, Stated Without Exaggeration
When 1,4-dioxane remains untreated over a long time, accumulation in household water can continue if present in the source. Although Frankfort’s water system monitoring shows no such accumulation at significant levels, any household with failing equipment originally designed to address this constituent might see a gradual return of low-level 1,4-dioxane in tap water until performance is restored by appropriate treatment.
5. How the Constituent Enters Groundwater or the Distribution System in This Region
1,4-dioxane, often called the solvent stabilizer or cyclic ether, can enter groundwater through industrial discharges, landfill leachate, and runoff. In Frankfort’s groundwater-sourced public water system, multiple monitoring events showed no detection above the stipulated method detection limit, suggesting minimal regional impact from these sources at present.
6. How Many Samples and Wells Stand Behind the Figures, and What a Small Sample Means
The EPA’s monitoring for this system included 18 samples collected between February and August 2014 from wells supplying Frankfort. While this sample size is limited compared to routine monitoring for regulated contaminants, it provides a snapshot for unregulated contaminant occurrence and cannot replace a homeowner’s own water test to know their specific water quality.
Closing Summary
The government data reviewed here indicate that Frankfort's water system has not shown measurable 1,4-dioxane above minimal detection levels in recent monitoring. Households experiencing equipment failure that previously addressed this constituent may consider the Autotrol 1,4-Dioxane Filter, which ships ready to configure and provides documented performance for cyclic ether challenges in residential water. Testing your home's water remains key to understanding current conditions and treatment needs.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2014-08-12. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR3 monitoring (2013-2015) for Frankfort (IL1970400), IL: 18 results across 1 listed contaminants, 0 detections above the reporting level; nothing detected above the method reporting level
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