We have many carbon filters that remove both chlorine and chloromine. For example, see here:
http://www.waterfilters.net/Pentek/wholehouse/Carbon_Filters/CGAC-10.htm
However, I am not yet familiar with a filter that specifically reduces chlorine dioxide. I would think the above filter may well reduce chlorine dioxide, but I am not certain. I can look into this more if you would like. What kind (drinking water/ whole house/ industrial/ etc) and quanitites are you hoping to find?
Thank you,
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