Too high copper levels in drinking water - Tips on the cause?

Hello,

We moved into our newly built house just under a year ago. Immediately after moving in, there was a severe storm, which meant we had to boil the water for a while. During this time, we quickly noticed that the lime scale deposits in the pot were not the usual whitish color but distinctly greenish. And this only happens in our house.
Water analyses have shown that the copper level is elevated. We measure around 1.5 mg/l at the hot water connection in the kitchen and bathroom.
The cold water value, on the other hand, is "only" 0.29 mg/l.
It has been checked whether the water enters our house "clean." This is proven to be the case (0.043 mg/l).

So far, several valves and non-return valves made of red brass between the house connection and the hot water buffer tank have been replaced, but this has not changed the analysis results.
According to the plumbing company, the actual pipes are made of stainless steel.

With the many analyses that have now been carried out, unfortunately we are back at square one and have no clue where to start or where the copper could be coming from.

I have been buying cases of PET water for a year now because I do not use our tap water for food preparation. And this has been going on for almost a year with no end in sight.

Has anyone ever had a similar problem or an idea of how the copper levels in the house can increase so extremely?

Thank you very much for your feedback and help.

I have to admit, this is the first time I’m hearing something like this. I don’t immediately know what it could be caused by. Maybe your [Leitungen] are routed incorrectly? Otherwise, I don’t know what else it could be..

I have to ask again because I talked about it with acquaintances. Is it really the copper level and not the iron level??? Elevated iron levels are more common in drinking water, but there are special filtration systems for that. Maybe just write back again:

The patina, copper oxidation. It's best if you flush the line at the highest tap point for 1-2 days. The installer probably didn't work cleanly; there are probably huge amounts of copper shavings left in the pipe. I would send the water bill to the installer.

According to the plumbing company, the actual supply pipes are made of stainless steel.

This should keep the amount of copper shavings within limits :rolleyes:.

Hi,
sounds somehow like something is decomposing in the installation, but it's strange that the pipes are made of stainless steel!
maybe ask the installer again carefully if there are any copper parts in the system!