Control of bromination of drinking water

A method for determining completion of a life cycle of at least one cartridge containing a polybromide impregnated resin used for introducing bromine into water for disinfection of the water comprising:

• placing a cartridge containing a polybromide impregnated resin in fluid flow communication with a supply of water to be disinfected;
• measuring the content of bromine in the water;
• initiating a timing cycle when the bromine content in the water is below a desired level;
• measuring the bromine content of the water during the duration of the timing cycle,
• discontinuing the timing cycle if the bromine content rises above the desired level;
• and
• outputting an alarm signal if the bromine content remains below the desired level during the timing cycle, said alarm signal indicating that the life cycle of the cartridge containing the polybromide impregnated resin is completed.