Does a natural source of Chromium 3 near a drinking water reservoir pose any issues during the water treatment process?
asked 31 October 2016 asked by bhrutledge@msn_com (420 points)
Having chromium near your drinking water reservoir shouldn't be a problem if your reservoir does not have infiltration. In other words, if the water table is high, make sure that no water enters your reservoir. If your raw water contains chromium, you have to make sure that the treated water respects the rules of your local environmental authorities. As an example, the drinking water standard of the EPA is 0.1 milligrams per liter (mg/l) for total chromium. If you have chromium in your raw water, some removal treatment exist.
In California this might pose an additional challenge, due to the fact that chlorine can convert Chromium 3 to Chromium 6 and although the California standard is 50 ppB for total Chromium, it is 10 ppB for Cr6. Federal standard as of today is 100 ppB total Chromium with no specific standard for Cr6 yet.