What is it about the water in Southwest Michigan?

In my apartment, everything - with the possible exception of human skin - touched by running water turns some shade of rusty brown. This seems to be true whether the surface is porcelain, plastic or whatever.

I am not some kind of housekeeping genius (I can supply testimonials) or neat-freak by any means - actually I could appear on one of those reality hoarding programs - but trying to keep the tub, toilet, sinks, and dishes a color approximating white or at least eggshell is driving me crazy.

The problem might be, in part, the fact that I have to use water - the thing that’s causing the discoloration - to clean the stains. Sort of like putting out a fire by throwing matchbooks at it.