Oh, please. Here we go again with the filtered water thing. City water is just fine and filter systems are just a gimmick, right?
Although city water has been treated and is generally good quality, by the time it gets to your faucet, it can have any and all of the things mentioned above: cloudy water, rust or blue-green staining, bacteria and viruses, hard water, chlorine, and rotten egg smell. If it wasn’t important, we wouldn’t be concerned about it. But it is. So we are.