RHODE ISLAND
For 1999 through 2022, click on the date for the corresponding eight-hour average peak ozone map for that day. In October 2015, EPA revised the 8-hour ozone standard and changed the Air Quality Index (AQI) to align with this new standard. Maps for days in 2007 and earlier are based on the 1997 8-hour ozone standard (0.08 ppm). Maps for 2008 through 2015 are based on the 2008 ozone standard (0.075 ppm). Maps for 2016 through 2023 are based on the 2015 ozone standard (0.070 ppm). Click Here for a table showing the revised AQI breakpoints for the 1997, 2008, and 2015 ozone standards.
W. Greenwich | Narragansett | Providence | E. Providence | E. Matunuck
W. Greenwich
Operating from 1982 to Present |
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Year | # Days > | 1st High (ppm) | Date | 2nd High (ppm) | Date | 3rd High (ppm) | Date | 4th High (ppm) | Date | |
0.075 | 0.070 | |||||||||
1994 | 20 | 26 | 0.123 | July 13 | 0.108 | June 18 | 0.105 | Aug 9 | 0.091 | July 7 |
1995 | 17 | 19 | 0.139 | July 14 | 0.120 | June 19 | 0.110 | Aug 21 | 0.107 | Aug 1 |
1996 | 10 | 12 | 0.101 | July 6 | 0.087 | Aug 23 | 0.086 | July 18 | 0.085 | Aug 7 |
1997 | 16 | 17 | 0.106 | June 30 | 0.100 | June 22 | 0.098 | July 15 | 0.098 | Aug 2 |
1998 | 10 | 17 | 0.097 | Aug 24 | 0.092 | Sept 27 | 0.091 | Sept 6 | 0.087 | June 25 |
1999 | 13 | 13 | 0.113 | July 16 | 0.104 | July 17 | 0.095 | June 24 | 0.091 | July 6 |
2000 | 13 | 15 | 0.098 | May 9 | 0.094 | June 9 | 0.089 | July 3 | 0.087 | June 2 |
2001 | 20 | 25 | 0.118 | Aug 9 | 0.115 | June 30 | 0.112 | July 25 | 0.105 | Aug 2 |
2002 | 23 | 27 | 0.120 | Aug 13 | 0.111 | July 9 | 0.101 | July 1 | 0.100 | Aug 12 |
2003 | 7 | 12 | 0.105 | June 27 | 0.084 | Aug 22 | 0.083 | July 27 | 0.082 | July 5 |
2004 | 4 | 10 | 0.103 | June 9 | 0.095 | June 8 | 0.081 | May 12 | 0.080 | June 15 |
2005 | 12 | 15 | 0.098 | June 25 | 0.097 | Aug 13 | 0.096 | Aug 5 | 0.090 | April 20 |
2006 | 5 | 10 | 0.091 | July 18 | 0.080 | May 25 | 0.080 | June 18 | 0.079 | July 2 |
2007 | 10 | 18 | 0.092 | June 1 | 0.091 | May 25 | 0.091 | June 27 | 0.089 | June 26 |
2008 | 2 | 7 | 0.086 | July 19 | 0.082 | June 10 | 0.074 | June 30 | 0.074 | July 26 |
2009 | 0 | 3 | 0.074 | April 28 | 0.073 | May 22 | 0.071 | Aug 20 | 0.069 | Aug 18 |
2010 | 2 | 6 | 0.081 | Sep 2 | 0.076 | June 24 | 0.073 | July 17 | 0.072 | April 7 |
2011 | 4 | 7 | 0.084 | July 6 | 0.081 | July 11 | 0.079 | June 21 | 0.078 | June 8 |
2012 | 2 | 7 | 0.082 | June 29 | 0.078 | Aug 31 | 0.075 | May 13 | 0.072 | April 15 |
2013 | 2 | 6 | 0.083 | June 25 | 0.081 | May 31 | 0.073 | May 30 | 0.073 | Aug 21 |
2014 | 0 | 0 | 0.069 | May 12 | 0.069 | May 27 | 0.069 | June 2 | 0.067 | June 3 |
2015 | 1 | 3 | 0.092 | June 11 | 0.074 | Sept 18 | 0.072 | July 1 | 0.070 | May 8 |
2016 | 2 | 4 | 0.084 | May 26 | 0.078 | May 25 | 0.075 | June 7 | 0.075 | July 6 |
2017 | 4 | 5 | 0.080 | May 18 | 0.077 | June 12 | 0.076 | June 11 | 0.076 | June 13 |
2018 | 3 | 5 | 0.081 | May 2 | 0.080 | May 25 | 0.076 | May 26 | 0.074 | July 10 |
2019 | 0 | 0 | 0.068 | July 30 | 0.066 | July 29 | 0.065 | May 20 | 0.064 | July 28 |
2020 | 1 | 1 | 0.080 | July 30 | 0.069 | Aug 21 | 0.065 | July 27 | 0.064 | July 19 |
2021 | 1 | 2 | 0.082 | June 5 | 0.074 | June 6 | 0.070 | June 30 | 0.067 | Aug 12 |
2022 | 0 | 0 | 0.069 | July 24 | 0.062 | Aug 4 | 0.060 | July 29 | 0.060 | Aug 2 |
2023 | 2 | 2 | 0.078 | April 13 | 0.078 | April 14 | 0.070 | July 1 | 0.066 | May 12 |
Narragansett
Operating from July 1997 to Present |
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Year | # Days > | 1st High (ppm) | Date | 2nd High (ppm) | Date | 3rd High (ppm) | Date | 4th High (ppm) | Date | |
0.075 | 0.070 | |||||||||
1997* | 7 | 7 | 0.097 | Aug 2 | 0.095 | July 17 | 0.087 | Aug 3 | 0.084 | Aug 16 |
1998 | 6 | 8 | 0.090 | June 26 | 0.081 | June 25 | 0.081 | Aug 3 | 0.080 | May 28 |
1999 | 14 | 17 | 0.118 | June 7 | 0.106 | July 6 | 0.098 | July 16 | 0.090 | June 23 |
2000 | 6 | 10 | 0.126 | June 10 | 0.087 | May 8 | 0.085 | June 9 | 0.085 | July 2 |
2001 | 18 | 21 | 0.123 | Aug 7 | 0.123 | Aug 9 | 0.101 | May 4 | 0.101 | Aug 2 |
2002 | 21 | 26 | 0.112 | July 2 | 0.101 | July 18 | 0.098 | July 1 | 0.094 | Aug 4 |
2003 | 11 | 13 | 0.113 | June 27 | 0.097 | June 26 | 0.093 | June 25 | 0.092 | Aug 16 |
2004 | 5 | 5 | 0.110 | June 9 | 0.097 | June 8 | 0.095 | May 12 | 0.086 | May 11 |
2005 | 13 | 18 | 0.093 | June 8 | 0.093 | Aug 5 | 0.090 | April 20 | 0.090 | Aug 11 |
2006 | 11 | 16 | 0.130 | July 18 | 0.100 | July 17 | 0.093 | Aug 1 | 0.081 | July 4 |
2007 | 9 | 14 | 0.100 | May 25 | 0.089 | July 8 | 0.085 | June 28 | 0.083 | Aug 2 |
2008 | 4 | 6 | 0.089 | June 10 | 0.086 | July 18 | 0.082 | July 19 | 0.081 | July 17 |
2009 | 0 | 3 | 0.075 | Aug 4 | 0.075 | Aug 18 | 0.075 | Aug 26 | 0.068 | May 20 |
2010 | 4 | 7 | 0.083 | July 5 | 0.080 | July 17 | 0.080 | Sep 1 | 0.079 | June 24 |
2011 | 3 | 7 | 0.084 | July 16 | 0.084 | July 22 | 0.083 | June 8 | 0.074 | July 23 |
2012 | 7 | 8 | 0.097 | June 29 | 0.086 | June 30 | 0.084 | Aug 31 | 0.082 | July 18 |
2013 | 4 | 9 | 0.093 | July 18 | 0.082 | May 30 | 0.080 | June 25 | 0.079 | June 24 |
2014 | 0 | 1 | 0.071 | Aug 5 | 0.066 | May 12 | 0.066 | July 22 | 0.063 | May 27 |
2015 | 4 | 7 | 0.084 | June 11 | 0.078 | Aug 17 | 0.077 | July 29 | 0.077 | Aug 15 |
2016 | 2 | 4 | 0.086 | May 25 | 0.081 | May 26 | 0.072 | July 6 | 0.071 | July 15 |
2017 | 3 | 5 | 0.086 | June 13 | 0.080 | May 18 | 0.079 | June 12 | 0.072 | May 19 |
2018 | 0 | 6 | 0.075 | July 10 | 0.075 | Aug 28 | 0.072 | Aug 2 | 0.071 | July 1 |
2019 | 1 | 2 | 0.078 | July 10 | 0.073 | June 29 | 0.068 | July 30 | 0.066 | July 29 |
2020 | 1 | 2 | 0.077 | July 27 | 0.074 | July 28 | 0.070 | July 30 | 0.067 | June 26 |
2021 | 1 | 2 | 0.083 | Aug 26 | 0.073 | June 6 | 0.069 | June 5 | 0.069 | Aug 13 |
2022 | 1 | 1 | 0.079 | July 20 | 0.069 | July 23 | 0.063 | Aug 5 | 0.062 | May 30 |
2023 | 3 | 6 | 0.081 | April 13 | 0.078 | June 30 | 0.078 | July 12 | 0.075 | July 1 |
*Site did not meet 75% minimum data completeness requirement |
Providence
Operating from 1982 to 1997 |
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Year | # Days > | 1st High (ppm) | Date | 2nd High (ppm) | Date | 3rd High (ppm) | Date | 4th High (ppm) | Date | |
0.075 | 0.070 | |||||||||
1994 | 8 | 13 | 0.108 | July 13 | 0.094 | June 18 | 0.094 | Aug 9 | 0.082 | July 2 |
1995 | 6 | 9 | 0.110 | July 14 | 0.097 | June 18 | 0.094 | Aug 1 | 0.089 | Aug 21 |
1996 | 1 | 1 | 0.085 | July 6 | 0.070 | Aug 23 | 0.069 | July 16 | 0.064 | June 1 |
1997 | 6 | 8 | 0.097 | July 15 | 0.092 | Aug 10 | 0.089 | July 17 | 0.085 | June 21 |
E. Providence
Operating from 1994 to Present |
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Year | # Days > | 1st High (ppm) | Date | 2nd High (ppm) | Date | 3rd High (ppm) | Date | 4th High (ppm) | Date | |
0.075 | 0.070 | |||||||||
1994 | 15 | 23 | 0.114 | July 13 | 0.101 | Aug 9 | 0.089 | July 7 | 0.089 | June 18 |
1995 | 13 | 19 | 0.119 | July 14 | 0.106 | Aug 1 | 0.099 | June 18 | 0.096 | Aug 21 |
1996 | 6 | 8 | 0.098 | July 6 | 0.089 | July 18 | 0.083 | Aug 5 | 0.083 | Aug 23 |
1997 | 8 | 11 | 0.097 | July 15 | 0.091 | June 30 | 0.090 | July 17 | 0.084 | Aug 10 |
1998 | 6 | 10 | 0.092 | Aug 24 | 0.085 | Sept 27 | 0.082 | July 15 | 0.077 | May 28 |
1999 | 7 | 14 | 0.096 | July 16 | 0.088 | June 24 | 0.084 | July 17 | 0.080 | May 31 |
2000 | 6 | 10 | 0.112 | June 10 | 0.089 | May 9 | 0.082 | June 2 | 0.080 | June 9 |
2001 | 19 | 24 | 0.108 | June 30 | 0.108 | Aug 7 | 0.106 | Aug 9 | 0.102 | Aug 2 |
2002 | 27 | 29 | 0.120 | Aug 13 | 0.103 | July 9 | 0.097 | July 1 | 0.092 | Aug 14 |
2003 | 7 | 12 | 0.104 | June 27 | 0.091 | Aug 22 | 0.087 | June 25 | 0.085 | July 27 |
2004 | 4 | 10 | 0.094 | June 9 | 0.093 | June 8 | 0.080 | June 15 | 0.077 | May 12 |
2005 | 7 | 10 | 0.095 | June 25 | 0.086 | June 26 | 0.086 | Aug 5 | 0.085 | April 20 |
2006 | 5 | 7 | 0.095 | July 18 | 0.082 | July 2 | 0.082 | July 17 | 0.081 | June 18 |
2007 | 11 | 22 | 0.096 | May 25 | 0.090 | June 27 | 0.089 | June 26 | 0.088 | Aug 3 |
2008 | 4 | 8 | 0.088 | June 10 | 0.086 | July 19 | 0.085 | June 14 | 0.077 | July 26 |
2009 | 1 | 2 | 0.076 | April 28 | 0.074 | May 22 | 0.070 | Aug 18 | 0.066 | Aug 17 |
2010 | 3 | 6 | 0.086 | Sep 2 | 0.076 | July 17 | 0.076 | July 21 | 0.075 | Sep 1 |
2011 | 3 | 4 | 0.078 | June 8 | 0.078 | July 6 | 0.076 | June 21 | 0.073 | July 11 |
2012 | 8 | 12 | 0.092 | Aug 31 | 0.084 | June 29 | 0.080 | July 17 | 0.079 | July 14 |
2013 | 5 | 6 | 0.085 | Sept 11 | 0.080 | July 19 | 0.078 | July 18 | 0.076 | May 31 |
2014 | 0 | 1 | 0.073 | July 22 | 0.070 | May 12 | 0.068 | June 2 | 0.063 | July 26 |
2015 | 1 | 4 | 0.089 | June 11 | 0.075 | Sept 18 | 0.073 | Sept 8 | 0.071 | July 1 |
2016 | 2 | 4 | 0.082 | July 22 | 0.078 | May 26 | 0.075 | July 6 | 0.071 | May 25 |
2017 | 3 | 4 | 0.085 | May 18 | 0.082 | June 12 | 0.076 | May 17 | 0.076 | June 11 |
2018 | 5 | 8 | 0.084 | May 25 | 0.083 | July 10 | 0.080 | May 26 | 0.079 | May 2 |
2019 | 1 | 1 | 0.081 | July 12 | 0.066 | July 30 | 0.066 | Aug 19 | 0.066 | Aug 30 |
2020 | 0 | 2 | 0.074 | Aug 5 | 0.073 | July 30 | 0.066 | July 27 | 0.064 | Aug 21 |
2021 | 1 | 3 | 0.081 | June 5 | 0.071 | June 6 | 0.071 | Aug 26 | 0.069 | June 30 |
2022 | 0 | 1 | 0.073 | July 24 | 0.067 | July 20 | 0.065 | June 26 | 0.063 | July 23 |
2023 | 1 | 2 | 0.077 | April 14 | 0.075 | April 13 | 0.074 | July 1 | 0.066 | July 12 |
E. Matunuck
Operating from 1994 to Present |
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Year | # Days > | 1st High (ppm) | Date | 2nd High (ppm) | Date | 3rd High (ppm) | Date | 4th High (ppm) | Date | |
0.075 | 0.070 | |||||||||
2020 | 0 | 0 | 0.087 | July 27 | 0.071 | July 28 | 0.069 | June 26 | 0.067 | June 25 |
2021 | 0 | 0 | 0.073 | May 18 | 0.071 | Aug 13 | 0.069 | May 17 | 0.069 | June 6 |
2022 | 0 | 0 | 0.091 | July 20 | 0.085 | July 23 | 0.078 | June 25 | 0.075 | July 22 |
2023 | 2 | 5 | 0.082 | July 12 | 0.076 | July 1 | 0.074 | September 7 | 0.073 | April 13 |