Copper

[Snaz]

My water guy posted his latest trace metal results and copper jumped out at me with at 0.021ppm Which is 10 times the detectable limit of the test that the independent lab used. So there was differently some copper in the water if the results are accurate albeit only 21 parts per billion.

My question is 21 ppb cause for concern?

The total conductivity of the water was 2 and I think conductivity is the same as TDS. I will have to google to confirm.