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Assessment of Total Chromium in Illinois Community Water Supplies

In response to the Environmental Working Groupís recent report on the presence of chromium-6 in drinking water, U.S. EPA will work with state and local officials to better determine how wide- spread and prevalent this contaminant is. When U.S. EPA finishes their guidance and approved sample method for chromium-6, it will be used to develop a network to scientifically assess the prevalence of chromium-6 in source water (surface and groundwater), drinking water, and public water supply distribution systems. This information will help to prioritize U.S. EPAís technical assistance and guidance. Moreover, it will also assist U.S. EPA with the question of prevalence and need to establish a drinking water standard.

Illinois EPA believes that it is very important that we start with a sound understanding and assessment of what we know relative to total chromium in Illinois ground and surface water (including Lake Michigan) used as a source of public water supply. To that end, Illinois EPA has developed a Chromium-6 Strategic Plan. The statistically designed network to sample for Chromium-6 and total Chromium can be found in the Chromium-6 Strategy Update. The Illinois EPA has also prepared a fact sheet entitled “Assessment of Total Chromium in Illinois Community Water Supplies” which references data for drinking water quality for total chromium, as well as source water quality for total chromium from surface water and groundwater sources.

Chromium 6 Monitoring Status Report

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