Fleck VOCs & Industrial Chemicals Filter

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Local Water Source and Distribution in Fresno

The City of Fresno's water system draws from surface water sources to provide water to over half a million residents through a large network of connections serving Fresno County. This water is treated and delivered to homes, where it reaches household taps for daily use.

Symptoms in the Home That May Suggest VOC Presence

Households concerned about volatile organic compounds (VOCs) might notice unusual tastes or chemical odors in water. However, these sensory indicators do not definitively signal VOC presence or concentration levels. Since many factors affect taste and smell, they alone cannot identify VOC issues accurately.

How VOCs Enter Fresno's Water System

VOCs can originate from industrial activities, chemical spills, or urban runoff entering surface water sources. In Fresno's public water supply, federal records indicate certain VOCs have been detected at low levels, reflecting their presence in the source waters prior to treatment and distribution.

Sampling Scope and What Detected Levels Represent

The Environmental Protection Agency's Unregulated Contaminant Monitoring Rule (UCMR) collected data from 2013 to 2015 for the City of Fresno public water system. Sampling involved hundreds of tests across the system. For example, 1,1-dichloroethane was detected in 17 out of 386 samples, always at relatively low concentrations. No detection exceeded federal maximum contaminant levels because none currently exist for these particular VOCs. Detection indicates measurable amounts, but does not imply health risk or water safety issues.

Information to Gather Before Seeking Treatment Options

Households should have their own water independently tested to determine specific VOC concentrations. Knowing what VOCs are present and at what levels is essential before selecting a treatment approach. General area data provide context but cannot replace individual testing results.

Interpreting Measured VOC Concentrations within Federal Frameworks

Federal regulations do not currently establish maximum contaminant levels (MCLs) for the VOCs detected in Fresno's system under UCMR3. This means no legal health-based limits are in place for these compounds. Detection reflects monitoring efforts and scientific awareness but does not define a violation or unsafe condition.

Distinguishing Public Water System Records from Private Well Testing

Public system data represent aggregated sampling for large populations and broad water distribution networks. Private wells can have very different water quality profiles, requiring specific testing to understand individual household conditions. Public data cannot confirm or exclude VOC levels in a private well.

Clarifying What Fresno's VOC Data Does Not Establish

It is important not to conclude that detections equate to unsafe or non-compliant water. The City of Fresno's water system has no recorded health-based violations for VOCs. Detected VOC concentrations are below any federal health-based thresholds because those thresholds do not exist for these substances. Therefore, these detections serve as informational points rather than indications of contamination or risk.

For households seeking to address VOCs, evaluating individual water tests remains critical. When treatment is desired, options like the Fleck VOCs & Industrial Chemicals Filter ship ready to configure and offer a documented method for reducing VOCs and related compounds from household water.

Where this information comes from

Source: EPA SDWIS public water system record. Sampled 2015-12-03. 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 Fresno (CA1010007), CA: 2757 results across 7 listed contaminants, 76 detections above the reporting level; no federal MCL for these UCMR-listed VOCs