I originally started looking at the my water pipes because drinking my tap water gives a burning / dry sensation in my mouth and stomach.
My copper water pipe looks corroded / affected and has probably leaked some water on the tube from the neighbors.
I was wondering if anyone spotted something weird on the pictures or has heard of this problem before.
I've tried having all the taps open for 1+ hour, which doesn't change anything.
I have called a couple of companies, but they told me they can only try to test the water for a lot of money and maybe get a result out of that so they can fix the problem by chemically cleaning the tubes for more money.
Any help is very much appreciated.
Best Answer
Get a water test kit (from a laboratory - "home kit test strips" are next to useless IME) carefully follow the directions for taking a sample, send it to the laboratory, read the results.
There's really no way to infer what your water problems might be over the internet.
Many state (or similar local area) governments have relatively low cost water testing laboratories. They are there for the safety of your drinking water, not to sell you anything. There are also independent laboratories.