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Annual Summary Information for Ozone

Prior to 2008, the 8-hour ozone exceedance day tables reflect the 1997 NAAQS (84 ppb) and from 2008 forward, the tables reflect the 2008 NAAQS (75 ppb).  Tables from 2016 forward reflect the 2015 NAAQS (70 ppb). EPA's 2004 Implementation Rule revoked the 1-hour NAAQS, effective June 15, 2005, but states are not allowed to backslide from existing 1-hour ozone requirements. Note that the ozone season was expanded in 2017 to include March through September.
 

Year

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

8-hr Ozone

Exceedance Days

21

17

21

23

20

31

22

8

18

27

14

24

Year

2009

2008

2007

2006

2005

2004

2003

2002

2001

2000

1999

1998

8-hr Ozone

Exceedance Days

 

6

22

17

13

20

6

14

36

26

15

33

25

Current Year 8-Hour Ozone Tables

2021

8-hour Tables

March

April

May

June

July

August

Sept

 

 

Year

Previous Year Ozone Tables

2020 

                                                         

8-hour Ozone

2019

1-hour Ozone

8-hour Ozone

2018

1-hour Ozone

8-hour Ozone

2017

1-hour Ozone 

8-hour Ozone

2016

1-hour Ozone

8-hour Ozone

2015

1-hour Ozone

8-hour Ozone

2014

1-hour Ozone

8-hour Ozone

2013

1-hour Ozone

8-hour Ozone

2012

1-hour Ozone

8-hour Ozone

2011

1-hour Ozone

8-hour Ozone

2010

1-hour Ozone

8-hour Ozone

2009

1-hour Ozone

8-hour Ozone

2008

1-hour Ozone

8-hour Ozone

2007

1-hour Ozone

8-hour Ozone

2006

1-hour Ozone

8-hour Ozone

2005

1-hour Ozone

8-hour Ozone

2004

1-hour Ozone

8-hour Ozone

2003

1-hour Ozone

8-hour Ozone

2002

1-hour Ozone

8-hour Ozone

2001

1-hour Ozone

8-hour Ozone

2000

1-hour Ozone

8-hour Ozone

1999

1-hour Ozone

8-hour Ozone

1998

1-hour Ozone

8-hour Ozone

 
Content last updated on September 16, 2021