EBMUD uses chloramine in its drinking water to maintain a disinfection residual in the distribution system. Chloramine is safe for all pets except those with gills (fish, tadpoles, etc.). Water that contains chloramine (or chlorine) may be treated a number of ways, including commercial products found in pet supply stores. Just follow the instructions on the package. If you have any questions, consult the manufacturer's web page, because these products contain varying amounts and types of reactive agent.