> I hated my pitcher filter long before I knew I didn’t need it. It would clog up any time a bit of rusty water came through the pipes, which, in a 70-year-old building with cast-iron service lines, was often.

I'm a little confused that this is used as an argument against filtering water. I get that iron is not a particularly worrisome contaminant, but I still don't want the occasional "bit of rusty water" showing up in my glass