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UCMR3 Reporting Versus State Notification Levels for 1,4-Dioxane in Albany County

Federal Monitoring and Its Role

The U.S. Environmental Protection Agency’s Unregulated Contaminant Monitoring Rule (UCMR3) collected data on 1,4-dioxane, also known as the cyclic ether and solvent stabilizer, in public water systems from 2013 to 2015. For the City of Laramie, which serves over 32,000 people in Albany County, these measurements are about the system's water quality, not any individual household.

Distinction from State Notification Levels

A detection reported in UCMR3 is not a regulatory violation or health advisory. State notification levels, when established, guide local actions but are separate from federal monitoring results. No health-based violation or unsafe condition has been recorded for 1,4-dioxane in Laramie’s water system.

Precision in Low-Level 1,4-Dioxane Reporting

Reporting to Three Decimal Places

The federal findings record 1,4-dioxane concentrations in micrograms per litre (µg/L), equivalent to parts per billion (ppb), with values as detailed as 0.07 µg/L. This high precision reflects the sensitivity of laboratory instruments, capturing even minimal amounts of the cyclic ether, not indicating a health risk.

Interpreting Detection Limits

Measured values below the reporting level of 0.07 µg/L are noted as nondetects. Because 1,4-dioxane lacks a federal maximum contaminant level, these precise low-level readings serve monitoring rather than compliance purposes.

Household Indicators Related and Unrelated to 1,4-Dioxane

What Symptoms Are Not Related

If your previous water treatment equipment has stopped working, issues like chlorine taste, staining, or hardness changes do not indicate the presence or increase of 1,4-dioxane since this chemical does not affect water taste or appearance at typical environmental levels.

When to Consider Testing for 1,4-Dioxane

1,4-Dioxane is a solvent stabilizer that can be introduced into source water from industrial or surface runoff sources. Since it is colorless and odorless, only specific laboratory testing of your household water can determine if it is present where you live.

Understanding the Sampling Record Terms

The Meaning of 'Detected'

In the 2013-2015 UCMR3 data for the City of Laramie, no sample showed 1,4-dioxane concentrations above 0.07 µg/L, the reporting level. This means none were measured at or above this minimal detection threshold during that period.

What Median and Range Convey

Because all results were below detection, median and range values for 1,4-dioxane concentration are effectively nondetectable. These terms quantify the typical and spread of measured concentrations when data is available but do not imply risk in this context.

Seasonal and Multi-Year Sampling Variation in 1,4-Dioxane Levels

Sampling Dates and Frequency

The City of Laramie’s water was sampled multiple times between February and November of 2013. The consistency of nondetect results over this period indicates stability in 1,4-dioxane presence during these seasons.

Implications of Time and Environment

Surface water sources can fluctuate due to weather and runoff. Although these measurements provide a snapshot with no detected 1,4-dioxane above minimal levels during 2013, conditions can change, so current household water testing is important, especially after equipment failure.

Addressing 1,4-Dioxane in Your Home Water After Treatment Equipment Failure

If your household water equipment has ceased functioning and you are concerned about the presence of 1,4-dioxane or similar contaminants, direct testing of your water is the best way to understand your current situation. The Fleck 1,4-Dioxane Filter ships ready to configure for household use, providing a documented method to treat water where testing confirms a demand. This product helps manage your household’s treatment need based on your measured water quality, independent of the regional federal monitoring data.

Where this information comes from

Source: EPA SDWIS public water system record. Sampled 2013-11-19. These figures describe the public water system's record, not the plumbing inside any individual building.

On record: EPA UCMR3 monitoring (2013-2015) for City of Laramie (WY5600029), WY: 10 results across 1 listed contaminants, 0 detections above the reporting level; nothing detected above the method reporting level