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Today’s Chromium-6 well water finding comes to us from the Coachella Valley region of California known and the detected levels of Chromium-6 in the water greatly exceed California’s public health goal.
Hexavalent chromium, a potentially cancer-causing heavy metal made famous by activist Erin Brockovich, is found in drinking water supplies throughout most of the Coachella Valley at 150 to more than 1,000 times above California’s public health goal, a Desert Sun review of local water agencies’ well-testing results found.
The National Toxicology Program of the U.S. Department of Health and Human Services concluded in 2008 that hexavalent chromium, or chromium-6, in drinking water shows “clear evidence” of causing cancer in laboratory animals. And a 2010 draft toxicological review by the EPA found the contaminant in tap water is “likely to be carcinogenic to humans.”
But scientific study on chromium-6 is ongoing, and some recent findings call into question at what levels and under what circumstances ingesting the metal may cause cancer.
California’s public health goal for chromium-6 levels is not a regulatory standard, only a step in the process of establishing one. State and federal regulators have yet to set a maximum allowable drinking water contaminant level for the metal, but work toward one is under way. ( source )
Regardless of whether or not California or the USEPA has established an official safety limit (i.e. Maximum Contaminant Level) for Chromium-6 in drinking water, none of us here at Water Testing Blog would want to drink water that contained that high a concentration of Chromium-6.
Testing for Chromium-6 in water?
You may pick up an easy-to-use test kit for chromium made by SenSafe/WaterWorks in our online water testing store.
As an alternative, yo can use a test called Heavy Metals Water Check Test Strip, a product also manufactured by SenSafe. It detects Chromium-6 but the product will not differentiate between Chromium-6 and the other metals it can detect. But, in all honesty, any heavy metals detected in one’s drinking water should make a person want to take action.
Removing or reducing Chromium-6?
A company called ZeroWater manufactures point-of-use water filters & water pitchers using NSF Certified (NSF 42 & NSF 53) technology that supposedly reduce the number of Total Dissolved Solids in drinking water to zero.
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For those who in search of a water filter system capable of producing quality drinking water out of the tap rather than a pitcher or dispenser, the NSF 58 Certified Goldline Reverse Osmosis System which carries the WQA Gold Seal installs under the sink (i.e. out of sight) and produces just under 11.5 gallons of purified drinking water per day.
]]>Water insoluble chromium(III) compounds and chromium metal are not considered a health hazard, while the toxicity and carcinogenic properties of chromium(VI) are known for a long time. An actual investigation into hexavalent chromium release into drinking water was used as the plot-basis of the motion picture Erin Brockovich.
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The proposed beneficial effects of chromium(III) and the use as dietary supplements yielded some controversial results, but recent reviews suggest that moderate uptake of chromium(III) through dietary supplements poses no risk.
World Health Organization recommended maximum allowable concentration in drinking water for chromium (VI) is 0.05 milligrams per liter. Hexavalent chromium is also one of the substances whose use is restricted by the European Restriction of Hazardous Substances Directive.
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The acute toxicity of chromium(VI) is due to its strong oxidational properties. After it reaches the blood stream, it damages the kidneys, the liver and blood cells through oxidation reactions. Hemolysis, renal and liver failure are the results of these damages. ( source )
Despite the fact that some governments around the world try to keep an eye on industry’s use and disposal of chromium products one cannot dismiss the notion that chromium in drinking water could still cause harm in their life — especially if the water comes from a private well.
As chromium compounds were used in dyes and paints and the tanning of leather, these compounds are often found in soil and groundwater at abandoned industrial sites, now needing environmental cleanup and remediation per the treatment of brownfield land. Primer paint containing hexavalent chromium is still widely used for aerospace and automobile refinishing applications. ( source )
Testing for Specific Metals in Drinking Water
For those wishing to test for specific metals in their drinking water, please use the links below to locate information about ion-specific metals in water test kits:
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