Government Sampling for 1,4-Dioxane in Cleveland County's Moore Water System
The EPA's monitoring from 2013 to 2015 for the Moore public water system, which serves over 55,000 people through more than 24,000 connections in Cleveland County, Oklahoma, detected no 1,4-dioxane levels above the reporting threshold of 0.07 micrograms per liter (µg/L). This federal survey is a broad occurrence assessment and not a compliance test or health safety evaluation for individual homes. While no detection exceeded the cancer risk reference concentration of 0.35 µg/L established by the EPA, this data only summarizes results at the system-wide scale.
Why a Low-Level Detection Reported to Three Decimal Places Matters
Measurements recorded to three decimal places, such as 0.070 µg/L, reflect the sensitivity and precision of laboratory instruments used to detect trace amounts of the cyclic ether 1,4-dioxane in water. Such precision enables the identification of even minute quantities that may be present, aiding in monitoring contamination trends. However, a reported detection near this threshold is not indicative of an unsafe condition but provides a fine-grained metric for ongoing water quality assessments.
Interpreting Reverse Osmosis Rejection Rates and Their Limitations
Reverse osmosis (RO) systems frequently express performance by rejection rates—percentages indicating how much of a certain contaminant the membrane can block. For 1,4-dioxane, rejection rates vary, and even a high percentage does not guarantee complete removal in practice. Factors such as water chemistry, system configuration, and membrane condition influence actual performance. Therefore, households noticing their existing equipment falling short may require solutions designed specifically to target this solvent stabiliser at trace levels.
Meaning of 'Detected,' 'Median,' and 'Range' in the Sampling Record
In the context of the EPA's data for the Moore system, 'detected' means the laboratory instrument recorded an amount of 1,4-dioxane at or above the method reporting level. The 'median' refers to the middle value in the range of measurements, and the 'range' indicates the span from the lowest to highest detected concentrations during the monitoring period. For this system, no concentration of dioxane was reported above the 0.07 µg/L level, signaling low or undetectable presence rather than a complete absence.
Behavior of 1,4-Dioxane in Water: Movement Ahead of the Solvent Plume
As a cyclic ether and solvent stabiliser, 1,4-dioxane exhibits high mobility and solubility in water. Unlike many contaminants, it can move ahead of the original solvent plume it once stabilized in groundwater, traveling downgradient and potentially affecting areas beyond initial contamination zones. This property means that even if standard solvent monitoring finds no current solvent presence, the solvent stabiliser may have spread separately within the water supply.
Changes in Tap Water Quality After Utilizing the Documented Technology
For households in Cleveland County whose existing treatment equipment cannot keep pace with trace 1,4-dioxane presence, the C-Series 1,4-Dioxane Filter ships ready to configure as a targeted approach. This technology addresses the cyclic ether contaminant specifically, modifying water quality at the tap by reducing the concentrations of this solvent stabilizer. Unlike conventional filtration or boiling methods, this approach tackles the contaminant's chemical nature directly, supporting improved water quality for residential use.
In summary, the federal sampling record for Cleveland County's Moore water system shows no detection above the reporting threshold of 0.07 µg/L for 1,4-dioxane but reflects an ongoing need to monitor this mobile contaminant. Households noticing diminished performance from their current treatment should consider specialized filters designed for the cyclic ether, making informed decisions based on both regional data and specific water testing.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2015-12-07. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR3 monitoring (2013-2015) for Moore (OK2001412), OK: 43 results across 1 listed contaminants, 0 detections above the reporting level; nothing detected above the method reporting level