Public water system records for the City of Chandler, Maricopa County, show that chromium-6 (hexavalent chromium or Cr(VI)) was detected in 68 of 71 samples at concentrations up to 19.0 micrograms per liter (µg/L or ppb) during federal monitoring in 2014. These measurements represent the system's water source characteristics and do not specify any individual household's water quality.
How does chromium-6 occur naturally and from industrial sources in areas like Chandler?
Chromium-6 can originate from geogenic processes where arid and alkaline aquifers interact with chromium-rich minerals. These natural sources contribute to chromium(VI) presence in surface water supplying Chandler. Additionally, industrial activities such as metal plating or manufacturing can release chromium-6 into water bodies elsewhere, but the City of Chandler's supply primarily comes from surface water influenced by geological conditions.
Why has California set a 10 µg/L chromium-6 guideline, and what does it mean for residents in Maricopa?
California established a 10 microgram per liter threshold as a public health goal reflecting concerns about chromium-6's potential health effects based on state risk assessments. Though this is a state-specific guideline and not a federal enforceable limit, it provides context for individuals reviewing chromium-6 levels in water sources. Maricopa County’s municipal data show chromium-6 levels measured in a range that includes this guideline but do not indicate regulatory violations.
How does the Pentek Chromium-6 Filter address hexavalent chromium in home water?
The Pentek Chromium-6 Filter uses a specialized filtration technology designed to reduce chromium(VI) concentrations from residential tap water. By treating water as it enters a household, it helps manage chromium-6 levels effectively, providing an option for those whose existing equipment is no longer functioning. This unit ships ready to configure with household water systems.
Which appliances and fixtures show chromium-6 impact first after equipment failure?
Typically, fixtures with frequent water use such as kitchen faucets and bathroom sinks are the first points where chromium-6 concentrations become noticeable when existing treatment stops functioning. Appliances relying on untreated water, like ice makers or coffee machines, may also reflect changes. Addressing chromium-6 effectively at the point of entry helps protect all downstream water uses.
What will a certified laboratory test report for chromium-6 and how should a homeowner read it?
Laboratory analysis for chromium-6 provides a concentration value in micrograms per liter (µg/L). The report specifies the detected concentration, or notes if below the reporting level of 0.03 µg/L. Homeowners should consider these results in light of public water system data, the absence of a federal maximum contaminant level specifically for chromium-6, and state guidelines such as California’s 10 µg/L threshold. For precise knowledge of individual water quality, professional sample collection and laboratory testing is essential.
What maintenance schedule applies to the Pentek Chromium-6 Filter?
The Pentek Chromium-6 Filter requires regular cartridge replacement to maintain effectiveness, following manufacturer guidelines based on household water usage and water quality. This routine ensures consistent performance in managing chromium(VI) without interruption, avoiding the challenges posed by failed prior equipment.
In summary, City of Chandler public water records document chromium-6 detections measured by federal surveys but do not indicate violations or health-based exceedances. Residents concerned about chromium(VI) after treatment equipment failure should consider certified testing and may benefit from the Pentek Chromium-6 Filter, which ships ready to configure for home use. For official water quality data, refer to the EPA's public water system records.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2014-11-18. 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 Chandler (AZ0407090), AZ: 142 results across 2 listed contaminants, 134 detections above the reporting level; no federal MCL for hexavalent chromium; total chromium MCL 100 ug/L
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