Easy answer: Because my water is chlorinated. Yeah, yeah, I know, but the thing is, our drinking water straight from the tap doesn’t have a noticeable chlorine taste.
I hadn’t brewed coffee for a while, because I was cutting back due to pregnancy. Upon the recent arrival of Whatsit the Youngest, I went to brew a pot and realized that the coffeemaker was broken. So we have a new coffee maker with a stainless steel carafe. I mention this only in case it is somehow relevant to the chlorine tasting coffee.
Is the only answer to brew my coffee with filtered water? I never had to do this before, but maybe they’re overchlorinating our tap water now or something.