I wish I was as good at hacking computers to stalk like that, but unfortunately it's just a coincidence. I assume they process ore close to the mine. It's economically unfeasible to transport the ore. Just something I picked up studying Nazca lines. You can prospect for copper on google maps looking for blue mountains. That's water soluble copper right there. No human interaction required for ground water contamination of copper. Just have to live close to a source.
Too much copper can be a bad thing like not enough copper. Same thing with water PPM. we need some PPM for nutrients and too much causes kidney stones. Water stripped of PPM passing through a lead water line will leach lead and leach nutrients from your body. A high PPM water will deposit a calcium shield in a lead pipe and deposit kidney stones. It's a balancing act.
Since we're talking galvanic corrosion of dissimilar metals and water quality. Let's talk sacrificial anodes in your water heater. Put there to sacrifice the rod before the corrosion of your steel hot water tank.
Sounds like fun. But I dont want to drink corroded aluminum and not sure about high doses of magnesium or zinc although I understand they are beneficial TRACE elements. If you're drinking tap water all it takes is the hot water from the tank to cool off in the pipe to your tap before you`re potentially accidentally drinking stuff that hung out in your water heater.