Fleck 1,4-Dioxane Filter

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Local Groundwater Source and Water Delivery in Rockford

Rockford's public water supply is drawn from groundwater sources serving over 147,000 people through more than 51,000 connections, operating under system IL2010300. This source water is treated and distributed to households throughout Winnebago County. While the water undergoes standard municipal processing, certain trace constituents such as 1,4-dioxane have been detected through federal monitoring programs.

Understanding Reverse Osmosis and Its Variable Effectiveness

Reverse osmosis (RO) technology is commonly considered for removing various dissolved substances including organic compounds. RO rejection rates for 1,4-dioxane are documented but typically expressed as a percentage rather than a fixed guarantee. These percentages depend on system design and operating conditions, meaning actual removal can vary household to household. Therefore, the presence of a 1,4-dioxane trace in water despite existing equipment suggests the current RO or filtration is near its practical limit in reducing this cyclic ether.

Distinguishing Federal UCMR3 Detections from State Notification Levels

The EPA's Unregulated Contaminant Monitoring Rule 3 (UCMR3) detected 1,4-dioxane in Rockford's water between 2013 and 2015. These results should not be confused with any state notification level or regulatory threshold. UCMR3 serves as a surveillance measure rather than a compliance standard, providing data to inform future policymaking and treatment decisions.

Interpreting 'Detected', 'Median', and 'Range' in Sampling Records

In Rockford's system, of 52 samples collected, 18 contained 1,4-dioxane at levels above 0.07 micrograms per liter (parts per billion). The highest measured concentration was approximately 22.93 µg/L, while the median among detections was about 0.33 µg/L. 'Detected' means measurable presence by instruments—not a safety or legal finding. The 'median' reflects the middle value of those detections, indicating a central tendency, and the 'range' tells the span from lowest detection to highest recorded level.

Concerns Unique to Commercial or Industrial Water Users

Commercial and industrial operations often face stricter scrutiny or operational challenges due to higher water volumes and more sensitive equipment. Such users may require detailed water quality profiling, continuous monitoring, or customized treatment technologies. Residential households typically have simpler needs focused on aesthetic and health considerations, relying on fixed-capacity equipment to maintain water quality standards.

Applying Rockford's 1,4-Dioxane Data to Home Treatment Decisions

For a Rockford homeowner, the median detected 1,4-dioxane level of 0.33 µg/L in public water indicates occasional measurable presence of this solvent stabilizer. With current equipment struggling to keep pace, testing of individual household water is recommended to establish the actual concentration before selecting further treatment. Recognizing the range of concentration informs expectations about treatment capacity and maintenance requirements.

How the Fleck 1,4-Dioxane Filter Addresses This Cyclic Ether

The Fleck 1,4-Dioxane Filter ships ready to configure and uses technology specifically documented to target the cyclic ether compound commonly known as 1,4-dioxane. This equipment either captures or chemically neutralizes the solvent stabilizer, improving water quality beyond what older or standard filters achieve. It is designed to help households where existing equipment cannot adequately manage 1,4-dioxane levels reported in the Rockford system.

Clarifying What Rockford Water Data Does and Does Not Show

It is important not to interpret public water system data as representative of any single home's water profile. Government sampling reveals regional occurrences but cannot specify individual household conditions. The absence of EPA health-based violations in Rockford’s record confirms regulatory compliance, not an absolute guarantee of absence for 1,4-dioxane or other constituents in any tap. Homeowners should conduct their own water testing to inform tailored treatment choices.

Where this information comes from

Source: EPA SDWIS public water system record. Sampled 2015-12-09. These figures describe the public water system's record, not the plumbing inside any individual building.

On record: EPA UCMR3 monitoring (2013-2015) for Rockford (IL2010300), IL: 52 results across 1 listed contaminants, 18 detections above the reporting level; no federal MCL; EPA cancer risk reference concentration 0.35 ug/L