Here in the Pacific Northwest where I live, we’re lucky to have a lot of really great water (sometimes too much). But even in areas where the water is good, that doesn’t mean you should be drinking it straight out of the tap.
I pulled up the annual report from my local water district and looked at what’s in my tap water: Arsenic, barium, bromate, chromium, fluoride, nitrate, trihalomethanes, haloacetic acids and chlorine.
Yes those are all there in very low concentrations. But they’re still there. And some of them are hormone disruptors. There are other compounds in our tap water that aren’t tested for or measured... like residue from birth control pills and other prescription drugs.
Some of our hormones are in our bodies in such low concentrations that they’re measured in parts per trillion. It doesn’t take much to disrupt them. I saw an analogy that I thought was pretty good… think of a gin and tonic made with a drop of gin in a 6 mile long train of tank cars full of tonic. That one drop in that train of tank cars would be one part in a trillion.
So get a filter and always use it for your drinking water and when you’re cooking. You can get a Brita filter pitcher you can fill and keep in your fridge. Or you can get an under counter filter. Some people even spring for a whole house water filtering system.