the tap water quality in america has been going down for decades, at this point nearly every municipality's tap water has some dangerous amount of some awful chemicals like lead or fluoride and other pollutants from water sources where giant factories dump their cancerous waste. Not only do they not filter the water properly they then add shit like fluoride. I just buy bottled water even though it's annoying, only costs like 10 bucks a month if you get the gallon jugs and it tastes so much better.