ohmygod. I haven't started to appreciate this until recently, but NYC has the BEST. WATER. EVER. I really don't know the mechanics of it all, but for as long as I remember the house I grew up in the Chicago suburbs always had hard water/soft water issues. We'd try to control it by adding salt/mineral blocks, but it was never exactly right. To this day, whenever I take a shower at my parent's house the water is always way too hard or way too soft. Oh, and the tap was undrinkable since the water sometimes got mingled in with sewer water due to flooding or something.
But everywhere I have lived in NYC (the upper west side, hell's kitchen, prospect lefferts-gardens, downtown brooklyn and what the hey, i'll throw in N's spots, too--crown heights and bay ridge) has had the absolutely perfect level of hardness/softness. Perfect. At first I took it for granted because I thought that my family's house in Chicago was just a freakish place and was the only one that struggled with this. But when I visited LA, the small hotel we stayed in had terribly hard water that made my skin hurt! Yes, my skin would hurt after showering. And N's parents' place upstate near the Adirondacks also has water on the hard side. And my siblings' places in San Francisco and outer Bay Area is also too hard and too soft.
NYC water...I love you! It's something that you'll only miss once it's gone.