Chlorine is a chemical element used to disinfect water to kill pathogens
Chloramines is a solution made of Chlorine and ammonia; it is also used to disinfect water to kill pathogens

Since the 1920’s Chlorine has been the standard sanitizer for all municipal water treatment systems. However, in recent years municipalities have been treating water with Chloramine Solutions because this new chemical has longer shelf life, dissipates slower and is more economical than using larger amounts of Chlorine. Municipalities processing water for large cities and areas with hot climates have a higher probability of using Chloramine to treat their water supply.

If your municipality uses Chloramines to treat your water, it will be better to use a filter that is capable of removing Chloramines. Your filtration system will first need to break the ammonia and chlorine bond in the Chloramine solution so each chemical can be removed in its separate state. Chlorine water filtration systems cost less because Chlorine is lone entity and there is no chemical bond to break.