(NH Cl) Compound which combines chlorine with ammonia. Chloramine is used in about 20 percent of treated municipal water. While the chlorine acts as a disinfectant, the ammonia serves to stabilize the chlorine. As a result, the chlorine cannot readily escape into the air. This makes water treated with chloramine potentially more harmful than water that is simply chlorinated. Symptoms caused by chloramine are the same as those caused by excessive chlorine, i.e., leaf tip burn and decreased flowering. More information.