HB220 would direct the Utah DEQ to set study and set standards for bromine emissions, which come almost exclusively from the US Magnesium plant and are shown to accelerate PM2.5 formation.

A photo of the US Magnesium refinery in Tooele County on Jan. 27, 2017. The plumes from the plant had higher levels of chlorine and bromine, which boosted PM 2.5 levels in the area, according to a ...

A recent study declared that U.S. Magnesium accounts for as much as 25% of pollutants in northern Utah. Rep. Stoddard said his bill will no go after bromine and chlorine pollutants.

For that reason, the atomic weights of magnesium and bromine will now be expressed as intervals with upper and lower bounds instead of single values. The atomic weight of bromine, for instance, is ...

However, the group criticized a lack of action plan in the bill, which Jimenez's amendment removed. “Of course, we already know bromine emissions are an issue,” O2 Utah said in a statement.