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Region 1: EPA New England

2011 Ozone Exceedances

(Through December 31, 2011)

Below are the exceedances of the 0.075 parts per million (ppm) eight-hour average ozone standard, and the dates they occurred for each ozone monitor in New England. These data are preliminary, not quality assured and are subject to change.

Connecticut
Monitor Location Date Concentration (ppm)  
Greenwich 08/20/11 0.081 Peak Ozone AQI
Groton - Fort Griswold
Madison
07/23/11
07/23/11
0.085
0.090
Peak Ozone AQI
Greenwich
Groton - Fort Griswold
Madison
New Haven
Stratford
Westport
07/22/11
07/22/11
07/22/11
07/22/11
07/22/11
07/22/11
0.080
0.088
0.099
0.080
0.087
0.076
Peak Ozone AQI
Cornwall
Danbury
East Hartford
Middletown
Stafford
Westport
07/21/11
07/21/11
07/21/11
07/21/11
07/21/11
07/21/11
0.085
0.089
0.092
0.079
0.082
0.077
Peak Ozone AQI
Groton - Fort Griswold
Madison
Stratford
07/18/11
07/18/11
07/18/11
0.083
0.092
0.082
Peak Ozone AQI
Greenwich
Groton - Fort Griswold
New Haven
Westport
07/16/11
07/16/11
07/16/11
07/16/11
0.076
0.078
0.078
0.079
Peak Ozone AQI
Danbury
East Hartford
Greenwich
Groton - Fort Griswold
Madison
Middletown
New Haven
Stafford
Stratford
Westport
07/11/11
07/11/11
07/11/11
07/11/11
07/11/11
07/11/11
07/11/11
07/11/11
07/11/11
07/11/11
0.078
0.080
0.077
0.079
0.082
0.090
0.098
0.087
0.088
0.086
Peak Ozone AQI
Greenwich
Madison
New Haven
Stratford
Westport
07/07/11
07/07/11
07/07/11
07/07/11
07/07/11
0.086
0.079
0.077
0.087
0.087
Peak Ozone AQI
Danbury
Groton - Fort Griswold
Madison
Middletown
Stratford
Westport
07/06/11
07/06/11
07/06/11
07/06/11
07/06/11
07/06/11
0.082
0.076
0.078
0.088
0.079
0.081
Peak Ozone AQI
Danbury
E. Hartford
Groton
Middletown
06/21/11
06/21/11
06/21/11
06/21/11
0.083
0.081
0.077
0.079
Peak Ozone AQI
Danbury
Greenwich
Middletown
Stratford
Westport
06/09/11
06/09/11
06/09/11
06/09/11
06/09/11
0.086
0.079
0.079
0.084
0.087
Peak Ozone AQI
Greenwich
Groton - Fort Griswold
Madison
Middletown
New Haven
Stratford
Westport
06/08/11
06/08/11
06/08/11
06/08/11
06/08/11
06/08/11
06/08/11
0.093
0.080
0.097
0.085
0.085
0.095
0.101
Peak Ozone AQI
Greenwich
Groton - Fort Griswold
Madison
Middletown
New Haven
Stratford
Westport
06/07/11
06/07/11
06/07/11
06/07/11
06/07/11
06/07/11
06/07/11
0.087
0.082
0.097
0.080
0.083
0.092
0.092
Peak Ozone AQI
Danbury 06/01/11 0.081 Peak Ozone AQI

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Maine
Monitor Location Date Concentration (ppm)  
Bar Harbor
Cape Elizabeth
Kennebunkport
07/21/11
07/21/11
07/21/11
0.078
0.090
0.086
Peak Ozone AQI
Kennebunkport 07/06/11 0.076 Peak Ozone AQI
Bar Harbor 06/08/11 0.092 Peak Ozone AQI

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Massachusetts
Monitor Location Date Concentration (ppm)  
Martha's Vineyard 07/23/11 0.078 Peak Ozone AQI
Fairhaven
Martha's Vineyard
07/22/11
07/22/11
0.076
0.113
Peak Ozone AQI
Boston
Chelmsford
Chicopee
East Milton
Haverhill
Lynn
Newburyport
Stow
Uxbridge
Ware
Worcester
07/21/11
07/21/11
07/21/11
07/21/11
07/21/11
07/21/11
07/21/11
07/21/11
07/21/11
07/21/11
07/21/11
0.077
0.086
0.081
0.076
0.086
0.085
0.082
0.077
0.076
0.084
0.089
Peak Ozone AQI
Adams 07/20/11 0.088 Peak Ozone AQI
Fairhaven 07/16/11 0.081 Peak Ozone AQI
Chicopee
Haverhill
Uxbridge
Worcester
07/11/11
07/11/11
07/11/11
07/11/11
0.077
0.076
0.077
0.078
Peak Ozone AQI
Uxbridge 07/06/11 0.076 Peak Ozone AQI
Martha's Vineyard 06/18/11 0.076 Peak Ozone AQI
Fairhaven
Martha's Vineyard
06/08/11
06/08/11
0.080
0.093
Peak Ozone AQI
Fairhaven
Martha's Vineyard
06/07/11
06/07/11
0.085
0.082
Peak Ozone AQI

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New Hampshire
Monitor Location Date Concentration (ppm)  
Londonderry
Nashua
Rye - Odiorne State Park
Portsmouth
07/21/11
07/21/11
07/21/11
07/21/11
0.085
0.091
0.083
0.086
Peak Ozone AQI
Londonderry
Miller State Park
Rye - Odiorne State Park
07/11/11
07/11/11
07/11/11
0.077
0.076
0.077
Peak Ozone AQI

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Rhode Island
Monitor Location Date Concentration (ppm)  
Narragansett 07/22/11 0.084 Peak Ozone AQI
Narragansett 07/16/11 0.084 Peak Ozone AQI
West Greenwich 07/11/11 0.081 Peak Ozone AQI
East Providence
West Greenwich
07/06/11
07/06/11
0.080
0.084
Peak Ozone AQI
East Providence
West Greenwich
06/21/11
06/21/11
0.077
0.079
Peak Ozone AQI
East Providence
Narragansett
West Greenwich
06/08/11
06/08/11
06/08/11
0.078
0.083
0.078
Peak Ozone AQI

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Vermont
Monitor Location Date Concentration (ppm)  
Bennington 07/20/11 0.080 Peak Ozone AQI

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