Many Norman residents are concerned after finding out that Norman water has an average of 1.2 milligrams of aluminum per liter of water. The United States Food and Drug Administration recommends only .2 milligrams of aluminum in drinking water.
The aluminum is coming from Norman’s water treatment process. They use aluminum sulfate as a coagulant. Norman has looked at alternate coagulants to use in place of or to supplement the aluminum sulfate but many of those come with their own set of issues. However, Norman does plan to investigate other options, such as ferric sulfate. The trial will start soon and they plan to test it for at least a year.
Aluminum has been linked to Alzheimer’s Disease in some studies, though health experts still disagree on if aluminum poses a health risk or not.
This is not the first water concern for Norman in the last several years. In December of 2010, a study found that Norman water had high levels of hexavalent chromium, the chemical that made Erin Brockovich famous. Hexavalent chromium is considered a human carcinogen. However, many groups disputed the study and said the amounts were safe and that the study caused unnecessary fear.
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Photo credit- Derek Jensen (Tysto), 2005-December-10