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- Jan 5, 2020
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My latest ATI ICP test shows copper in my fresh RODI water. All of the plumbing to and in my newer home is plastic. Not sure where copper would come from? It wasn't showing in a test 4 months earlier. Not sure it is enough to matter. None in tank sample. POST RODI level 5.81 µg/l not much. All filters new and DI new.
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