"There is no significant evidence that the short-term NO2 standard established today by the Administrator is necessary to protect public health," API said in a statement. "EPA is over-regulating this air quality standard for political -- not health -- reasons."
EPA expects to identify areas in compliance with the standard based on the existing monitoring network by January 2012. New monitors must begin operating by Jan. 1, 2013. The agency intends to redesignate whether areas meet the new standard when three years of data are available from the new monitoring network.
The final rule will take effect 60 days after publication in the Federal Register.