Energy Tomorrow Blog
Posted April 14, 2020
Some points and data that help frame EPA’s proposed rule on National Ambient Air Quality Standards (NAAQS) for particulate matter (PM), which would retain all six of the current standards:Annual concentrations of PM2.5 have dropped 39% since 2000, and the U.S. has reduced emissions that can contribute to PM – including an 84% drop in sulfur dioxide (SO2), and a 54% decrease in nitrogen oxide (NOx) – since 2000. Fuel switching to clean natural gas in the power sector played an important role in those reductions. This progress can be helped by continued implementation of existing regulations.
Also: Retaining the current PM NAAQS is supported by the absence of compelling new evidence to lower the existing standards. Another NAAQS review was completed in 2015, and at that time an economic analysis indicated there could be a significant impact on the income of families and potential job losses if a lower NAAQS option was selected.
And: EPA’s proposal is consistent with the recommendation of the agency’s independent Clean Air Scientific Advisory Committee, which voted 5-1 to keep the current standards.
Posted July 29, 2011
Posted July 15, 2011
Jane Van Ryan
Posted October 5, 2010