Region 1: EPA New England

2018 Ozone Exceedances

(Through June 17, 2018)

Below are the exceedances of the 0.070 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)  
Madison 6/17/2018 0.072 Peak Ozone AQI
Greenwich 5/26/2018 0.077 Peak Ozone AQI
Groton 5/26/2018 0.074
Madison 5/26/2018 0.080
New Haven 5/26/2018 0.082
Stratford 5/26/2018 0.083
Westport 5/26/2018 0.084
Cornwall 5/25/2018 0.071 Peak Ozone AQI
Danbury 5/25/2018 0.072
Madison 5/25/2018 0.071
Stafford 5/25/2018 0.071
Westport 5/25/2018 0.075
Abington 5/3/2018 0.076 Peak Ozone AQI
Middletown 5/3/2018 0.077
Abington 5/2/2018 0.079 Peak Ozone AQI
Cornwall 5/2/2018 0.072
Danbury 5/2/2018 0.075
Greenwich 5/2/2018 0.071
Groton 5/2/2018 0.075
Madison 5/2/2018 0.071
Middletown 5/2/2018 0.078
Stafford 5/2/2018 0.073
Westport 5/2/2018 0.071

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Maine
Monitor Location Date Concentration (ppm)  
Acadia NP – McFarland Hill 5/2/2018 0.077 Peak Ozone AQI
Bar Harbor – Cadillac Mtn. 5/2/2018 0.077
Jonesport 5/2/2018 0.077
Port Clyde 5/2/2018 0.074

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Massachusetts
Monitor Location Date Concentration (ppm)  
Fall River 6/17/2018 0.075 Peak Ozone AQI
Fall River 5/26/2018 0.075 Peak Ozone AQI
Lynn 5/26/2018 0.071
Truro 5/26/2018 0.071
Brockton 5/25/2018 0.074 Peak Ozone AQI
Fall River 5/25/2018 0.074
Lynn 5/25/2018 0.074
Truro 5/25/2018 0.076
Uxbridge 5/25/2018 0.074
Worcester 5/25/2018 0.071
Blue Hill 5/2/2018 0.072 Peak Ozone AQI
Brockton 5/2/2018 0.078
Boston 5/2/2018 0.073
Fairhaven 5/2/2018 0.074
Fall River 5/2/2018 0.080
Lynn 5/2/2018 0.075
Martha's Vineyard 5/2/2018 0.071
Truro 5/2/2018 0.080
Uxbridge 5/2/2018 0.079
Ware 5/2/2018 0.071

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New Hampshire
Monitor Location Date Concentration (ppm)  
Londonderry 5/26/2018 0.072 Peak Ozone AQI
Summit of Mt Washington 5/18/2018 0.075* Peak Ozone AQI
Summit of Mt Washington 4/14/2018 0.071* Peak Ozone AQI

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Rhode Island
Monitor Location Date Concentration (ppm)  
E. Providence 6/17/2018 0.071 Peak Ozone AQI
Narragansett 6/17/2018 0.071
E. Providence 5/26/2018 0.080 Peak Ozone AQI
Narragansett 5/26/2018 0.071
W. Greenwich 5/26/2018 0.076
E. Providence 5/25/2018 0.084 Peak Ozone AQI
W. Greenwich 5/25/2018 0.080
W. Greenwich 5/3/2018 0.073 Peak Ozone AQI
E. Providence 5/2/2018 0.079 Peak Ozone AQI
W. Greenwich 5/2/2018 0.081

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Vermont
Monitor Location Date Concentration (ppm)  
Bennington 05/25/2018 0.071 Peak Ozone AQI

* Possible Exceptional Event

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