MCL: 0.01 ppm

Source: Water treatment disinfection byproduct, the bromide ion reacts with ozone during water treatment to create bromate.

Summary: Bromate is the conjugate base of bromic acid. Water treatment processes that use ozone may cause a reaction with the bromide ion that create bromate. Bromate is not very volatile and does not adsorb well to environmental surfaces. It has a density greater than water and is slightly soluble in water.