Latest ATI ICP water test results

I.AM.MR.MIKE · Jul 13, 2022

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.

blaxsun · Jul 14, 2022

I'd may not hurt to test it again in a few months. Maybe it got into the source water at some point (maintenance, etc.) or it's just a lab error.

Randy Holmes-Farley · Jul 14, 2022

I don’t think that level is a problem if the aquarium is not elevated, and it may just be error in the test.

If real, it may be from brass fittings upstream of the RO/di.