If your water smells like a thousand-year-old egg salad, you’ve got hydrogen sulfide gas. It’s not harmful, but it will make your morning coffee taste like regret. The hero here is an oxidation filter, which forces the smelly gas to turn into harmless particles you can filter out.
Fun fact: some systems use a little chlorine or ozone to do the job. It’s so effective that even your dog will stop giving you side-eye when you fill his bowl. And yes, your water will smell like… nothing. Which is a gigantic win when the alternative was “chemical warfare.”
