Interpreting Regional 1,4-Dioxane Data for Your Household
Garland County sampling reflects system-wide water quality, not individual homes
Data collected by the EPA’s monitoring rule pertains to the public water system serving Garland County through Hot Springs Utilities. This information represents aggregated results across multiple supply points and does not specify water quality at any single tap or well. Homeowners must test their individual water sources to determine exact 1,4-dioxane levels.
1. Movement of 1,4-Dioxane Beyond Solvent Plumes
1,4-Dioxane travels further than the solvent it stabilizes due to its chemical properties
The cyclic ether 1,4-dioxane is more mobile in water systems than many solvents it often accompanies. Because it moves ahead of the solvent plume, areas downgradient from contamination sources may experience detectable levels even where solvents are minimal or absent. This behavior complicates localized exposure assessments.
2. Precision of Low-Level Detections
Dioxane concentrations reported to three decimal places reflect high-sensitivity measurement techniques
Monitoring results display 1,4-dioxane in micrograms per liter (µg/L) with three decimals (e.g., 0.070 µg/L) to capture very low concentrations. Such precision is necessary because concentrations are often far below regulatory thresholds, making exact quantification critical for understanding background levels and potential risks.
3. Sample Size and Data Representation
Eight samples over nearly a year provide an initial but limited snapshot of dioxane presence
The EPA’s occurrence data for Garland County’s public water system includes eight samples collected from August 2013 to May 2014. This small number means the data set is not exhaustive and does not capture daily or seasonal variability. Larger and more frequent sampling is needed for comprehensive water quality profiling.
4. Treatment Technology for 1,4-Dioxane in Household Water
The C-Series 1,4-Dioxane Filter offers a configured solution for residential removal of the cyclic ether
This equipment uses advanced filtration technology designed specifically to address 1,4-dioxane, the solvent stabilizer known for its persistence and mobility in water supplies. It ships ready to configure and can be selected based on water testing results to meet household treatment needs.
5. Differences Between UCMR3 Detection and State Notification Levels
EPA’s unregulated contaminant monitoring results differ from state notification benchmarks for dioxane
The UCMR3 program detects 1,4-dioxane to support research without setting enforceable limits. Detected levels below the federal cancer risk reference concentration of 0.35 µg/L (parts per billion) are not violations or safety warnings. State notification levels, when established, can trigger advisories but represent different regulatory contexts and thresholds.
Conclusion: What Not to Infer from Area Data Alone
While Garland County’s public system data show no detections of 1,4-dioxane above 0.07 µg/L in these samples, homeowners should not assume their water is free from this constituent. Individual testing is essential to determine specific household water conditions. Selecting treatment like the C-Series 1,4-Dioxane Filter should be based on personal water analysis and consultation about technology fit.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2014-05-28. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR3 monitoring (2013-2015) for Hot Springs Utilities (AR0000209), AR: 8 results across 1 listed contaminants, 0 detections above the reporting level; nothing detected above the method reporting level