Point of use low pressure RO ...
Published by Joseph Cotruvo, President at Joseph Cotruvo & Associates, Water , Environment and Public Health
Point of use low pressure RO might be the only solution. But it is very inefficient, about 80% reject. They have to be maintained, and cartridges replaced as needed. Depending upon the type and concentration of arsenic, it might not work well for arsenic. +5 is removed better than +3. Would have to oxidize +3 first with chlorine.