This straw ballot will add language regarding chloramine reduction to NSF/ANSI/CAN 50.
When free chlorine reacts with ammonia and nitrogen in the water, it can form chloramines, which is often referred to as “combined chlorine”. Not only does a chloramine lose some disinfection strength, they often will form a gas at the surface that can result in respiratory health effects. Health departments are requiring pool operators to test for combined chlorine at a frequency to maintain combined chlorine at a concentration below 0.4ppm. Section 25 (Water Conditioning Devices) of the NSF 50 Standard was developed in part to address technologies designed in reduction of chloramines (combined chlorine). Two technologies, ozone and UV radiation, are also technologies that can reduce combined chlorines. Both technologies should be evaluated using the same method as those technologies covered under the scope of section 25.
An r1 version of this ballot drew comments, and the RWF Task Group on UV met 4 times, reviewing and revising language based on the comments. The r4 ballot presented here is the result of that work.
This ballot will last for two weeks. |
