[how]

Dear all

I want to know the  health effect of copper rust (blue color scale on copper due to moisture)

[AWK]

Are you going to eat it?
This is basic copper carbonate and its toxicity is related to toxicity of the copper content.

[how]

No,

but the copper will be immersed in drinkable water

[AWK]

Copper is essential to all living organisms as a trace dietary mineral.
The suggested safe level of copper in drinking water for humans is about 2.0 mg/l.

[billnotgatez]

You might want to read about Copper Toxicity
https://en.wikipedia.org/wiki/Copper_toxicity

It seems interesting that many places use Copper Tubing in house hold drinking supply systems.
https://en.wikipedia.org/wiki/Copper_tubing

Copper tubing is most often used for supply of hot and cold tap water, and as refrigerant line in HVAC systems. There are two basic types of copper tubing, soft copper and rigid copper. Copper tubing is joined using flare connection, compression connection, or solder. Copper offers a high level of corrosion resistance, but is becoming very costly.

There are many links about copper on WIKI including the general entry
https://en.wikipedia.org/wiki/Copper

[how]

pipe for drinkable water is copper there fore it seems okay if i use copper immersed in drinkable water application

[AWK]

pipe for drinkable water is copper

Rather brass (copper alloy with zinc).

[billnotgatez]

We do not give medical advice or the like on this forum due to potential litigation issues.
This is a forum policy.
Click on the link near the top center of the forum page.
Forum Rules: Read This Before Posting.
http://www.chemicalforums.com/index.php?topic=65859.0

You, on your own, can infer from the links we gave what logically would be the case.
There are many potential factors that are possible and we could not likely give a definitive answer.