Trivalent chromium is an essential micro-nutrient in the human diet and generally not considered toxic. Chromium is most commonly present in the environment in three forms: trivalent, hexavalent, and the solid metal form. Some household plumbing fixtures with chrome plating or stainless steel components may also release hexavalent chromium in the water.
It is discharged by industrial facilities such as coal burning power plants. It is also used industrially in steel making, metal plating, leather tanning, paints, dyes, and wood preservatives. What is chromium and where do you find it?Ĭhromium is a naturally occurring metal. There is much uncertainty about the significance of very low levels of Cr-6 in drinking water so we are providing the following facts to keep our customers informed about the issues regarding Cr-6 and WSSC Water’s actions. Our goal is to always provide clean, quality drinking waters to our customers.Increased interest in levels of hexavalent chromium (Cr-6) in drinking water typically arises following reports about the occurrence of this metal in the nation’s drinking water. PVWC is always concerned about any potential risk to our water system. The Water Quality Report is mailed each year to all bill-paying customers and posted on our website. The results of our tests were reported in our annual Water Quality Reports. In 2014, California became the first state to regulate Hexavalent Chromium, with a Maximum Contaminant Limit of 10 parts per billion. Testing of PVWC’s treatment plant and distribution systems found Hexavalent Chromium levels ranging from a low of 0.038 ppb (parts per billion) to 0.120 ppb at the treatment plant. The current EPA maximum contaminant limit is 100 ppb for total Chromium. PVWC was one of the water systems that participated in that testing. Over the past few years, the EPA has been considering regulating the presence of Hexavalent Chromium in drinking water.Īs part of its evaluation process, the EPA required that certain water systems test their water for Hexavalent Chromium. The Environmental Protection Agency (EPA) continually evaluates the risks of contamination to the water system and considers new drinking water regulations, as needed, to protect public health. In that case, the levels of Hexavalent Chromium found in the water system were hundreds of times greater than the levels present in public water systems.
The film “Erin Brockovich” was based on the real-life situation that occurred in 1993 in Hinkley, California.
The chemical Hexavalent Chromium naturally occurs in rock, plants and soil. According to the report, more than 200 million people are being exposed to Chromium-6 in their water supply. The articles are based on a report that focuses on the presence of Hexavalent Chromium, or Chromium-6, in water systems and proposals to create or modify existing regulations for this chemical. There have been recent news articles about the presence of Hexavalent Chromium, or the “Erin Brockovich” chemical in water systems throughout the United States.
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