Your water may look slightly green or blue if there are higher than normal levels of copper in it.
If you live in a new-build home, or you’ve recently had new copper pipework put in, you might notice green or blue discolouration or bits in your water.
The green or blue discolouration in your water could indicate higher than normal levels of copper.
A protective layer should form on the inside of the copper pipe that will stop this from happening within a few days of it being installed.
If you've not had your pipes replaced, then any green bits or colouration could be due to old copper pipes breaking down.