Comparison of 2008 and 2015 Ozone Standard Revisions

Source: Nonattaining counties under 2008 ozone standard are based on 2006-2008 ozone monitor data available from EPA's Air Trends website, http://www3.epa.gov/airtrends/values.html. Nonattaining counties for proposed 2015 ozone standards are based on 2013-2015 ozone monitor data current through September 15, 2015 available from EPA's Air Now API website, http://www.airnowapi.org/

51% of counties currently exceeding a 65 standard are in areas that have publically supported a stronger standard.

Additional Adverse Health Outcomes: 70 ppb vs. 65 ppb Standard (Source: EPA Regulatory Impact Analysis)

670,000 more missed school days

115,000 more missed work days

Counties Not Meeting 2008 Ozone NAAQS of 75 pbb at

Promulgation (based on 2006-2008 data): 321 counties

Counties Not Meeting Proposed 70 ppb Ozone NAAQS

(based on 2013-2015 data): 100 counties

Counties Not Meeting Proposed 65 ppb Ozone NAAQS

(based on 2013-2015 data): 314 counties

API’s Projected Counties Not Meeting Proposed 65 ppb Ozone

NAAQS (based on 2011-2013 data)

Counties Not Meeting Proposed 65 ppb Ozone NAAQS

(based on 2013-2015 data): 314 counties

Counties Not Meeting Proposed 70 ppb Ozone NAAQS

(based on 2013-2015 data): 100 counties

Counties Not Meeting Proposed 67 ppb Ozone NAAQS

(based on 2013-2015 data): 207 counties

Counties in Areas That Have Supported a Stronger Ozone Standard on Record (159) and Other Nonattaining Counties (155)

Under a 65 ppb NAAQS (2013-2015 data)

Counties in areas that have supported a stronger ozone standard on record

Other nonattaining

counties under a 65 ppb

NAAQS (2013-2015 data)