You might hear about “ion exchange” or “activated alumina.” These are fancy words for specific minerals that grab arsenic like a magnet. They work, but they’re not always DIY-friendly. I’d stick with RO or distillation unless you like reading tech manuals on a Saturday.
What about boiling? Nope, as I said, that just concentrates it. What about adding bleach? Please don’t—you’ll trade arsenic for a chemistry accident. Stick with the proven methods.
Arsenic Contamination of Groundwater | Encyclopedia MDPI