When you receive a laboratory test report showing chromium-6 levels in your household water, the numbers list concentrations measured in micrograms per liter (µg/L). Public water system data for Fresno from 2013 to 2015 indicates chromium-6 was detected in 390 out of 393 samples, with detected levels ranging up to 13.0 µg/L and a median around 2.0 µg/L. It is important to recognize this data reflects the City of Fresno's treated surface water supply as a whole, serving over half a million residents, not the precise concentration in any individual home.
How the Pentair Chromium-6 Filter Removes Chromium-6
The Pentair Chromium-6 Filter employs a specialized filtration technology designed to reduce chromium-6 from water passing through it. This system targets chromium-6 ions, using a method that traps and retains these particles to reduce their concentration before water reaches household taps. By operating at the point of use, it treats water regardless of the starting level, offering a customizable approach depending on individual water test results.
Maintenance Rhythm of the Pentair Chromium-6 Filter
This filtration system is built to require routine maintenance to maintain effectiveness. Users are advised to replace filter components on a regular schedule dictated by usage volume and water quality. Following the specific maintenance intervals ensures the filter continues to reduce chromium-6 efficiently. Detailed instructions come with the product to guide users through timely replacement of filter cartridges and system checks.
Why Aesthetic Secondary Standards Differ from Health-Based Limits for Chromium-6
Chromium-6 does not have a federally enforceable maximum contaminant level (MCL), but total chromium is regulated up to 100 µg/L. Secondary standards exist to address water's taste, odor, and appearance and differ significantly from health-based limits. The concentrations detected in Fresno's water system fall below total chromium limits and have not triggered health-based violations. These secondary standards help consumers evaluate water aesthetics without implying a health risk.
The Role of Plumbing Material and Age, Separate from Source Water
The presence of chromium-6 or total chromium in household water depends primarily on source water, but old plumbing materials can interact with water chemistry and influence metal content. While the City of Fresno supplies surface water meeting regulatory requirements, individual home plumbing systems might contribute factors like corrosion or leaching that alter metal levels locally. Understanding your plumbing system's age and materials can help distinguish between source and in-home contributions to measured chromium.
The Order to Rule Out Issues: From Simple Checks to Lab Tests
- Check your plumbing: Inspect visible plumbing for corrosion or unusual stains often associated with metal release.
- Review recent water reports: Consider the City of Fresno's water quality report for baseline chromium-6 levels in your area.
- Conduct home water tests: Use certified laboratories to measure chromium-6 levels specific to your household water supply.
- Consider treatment if needed: Depending on test results, evaluate water treatment options such as the Pentair Chromium-6 Filter to reduce chromium-6 presence.
The City of Fresno's public water system record covers over 545,000 residents and confirms no violations of health-based standards for chromium-6 for samples collected during 2013-2015. For full details, consult the EPA’s Safe Drinking Water Information System (SDWIS) public water system data.
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: 786 results across 2 listed contaminants, 764 detections above the reporting level; no federal MCL for hexavalent chromium; total chromium MCL 100 ug/L
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