Can I wash my clothes with the treated water? A Can I wash my clothes with the treated water? Wait for 48 hours after dosing if the treated water feeds into your washing machine. Test the first wash on 1 or 2 old coloured clothes to make sure they don’t get bleached. (Chlorine Dioxide is a natural bleach.) Back to Top Does Chlorine Dioxide remove tannin discolouration? Can I use treated water for my garden?