After the water has been filtered, a disinfectant ( chlorine, chloramine)is added in order to kill any remaining parasites, bacteria, and viruses, and to protect the water from germs when it is piped to homes and businesses. The Chloramine is added to kill parasites and living microbes and the Chloramine will not evaporate even with heat. The only way to remove Chloramine is by RO or distillation. Chloramine is a additive that is harmful to plant microbes and is best not to use if one can. However people grow plants using tap water all the time, but the long term use of Chloramine build up in the soil is not as good as using clean water Since Chloramine is used to kill living organisms, it is not as good as clean water like RO, RAIN, Distilled for your prize plants.