EPA to Limit Emissions from Cement Production

The U.S. Environmental Protection Agency (EPA) announced in April 2009 that it would step up its regulation of emissions from cement kilns, including the first-ever regulations for existing facilities. In response to a lawsuit brought against the agency in 2006 by environmental groups and nine states, EPA is drafting a rule that would set stricter limits on emissions of mercury, hydrocarbons, particulate matter, and sulfur dioxide from cement kilns of all sizes, and would reduce hydrochloric acid emissions from kilns that are large emitters.

According to EPA, cement kilns are the fourth-largest source of atmospheric mercury in the U.S., and this rule could reduce their contribution to total mercury emissions by 80%–90%. The rule would apply to 136 kilns in 35 states; dozens of other kilns, notably those that burn hazardous waste, will be regulated separately.

The draft rule was published May 5, 2009. After a 60-day public comment period, EPA will hold a hearing if one is requested.