The U.S. Environmental Protection Agency (EPA) recently confirmed
that New England states experienced fewer days with unhealthy air
quality this year, compared to 2018. Based on preliminary data collected
between March and September 2019, there were 24 days when ozone
monitors in New England recorded ozone concentrations above levels
considered healthy. In 2018 there were 28 unhealthy ozone days in New
England.
The number of unhealthy ozone days in each state this summer, and for last summer are as follows:
The number of unhealthy days (when ozone concentrations exceed the 0.070 parts per million standard) vary from year to year, due to weather conditions. Hot, sunny, summery weather is conducive to ozone formation. For 2019, a cool, wet spring lead into an average New England summer. Since 1983, New England has experienced a decrease in the number of unhealthy ozone days. In 1983, New England had 118 unhealthy days, compared with only 24 this year. This downward trend is due to a reduction in emissions that form ozone. Although the 2019 ozone season is ending, pollution from small particles in the air is a year-round concern.
Background information:
EPA: Region 1: Air Quality Index
U.S. EPA: Ground-level Ozone Pollution
The number of unhealthy ozone days in each state this summer, and for last summer are as follows:
- 21 days in Connecticut (compared to 23 in 2018)
- 5 days in Massachusetts (12 in 2018)
- 2 days in Rhode Island (12 in 2018)
- 1 day in New Hampshire (6 in 2018)
- 1 day in Maine (3 in 2018)
- 0 days in Vermont (1 in 2018).
The number of unhealthy days (when ozone concentrations exceed the 0.070 parts per million standard) vary from year to year, due to weather conditions. Hot, sunny, summery weather is conducive to ozone formation. For 2019, a cool, wet spring lead into an average New England summer. Since 1983, New England has experienced a decrease in the number of unhealthy ozone days. In 1983, New England had 118 unhealthy days, compared with only 24 this year. This downward trend is due to a reduction in emissions that form ozone. Although the 2019 ozone season is ending, pollution from small particles in the air is a year-round concern.
Background information:
EPA: Region 1: Air Quality Index
U.S. EPA: Ground-level Ozone Pollution
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