Boston-Worcester-Providence metro area Experienced Worsened Ozone Pollution, According to the 25th Annual ‘State of the Air’ Report

American Lung Association’s 25th Annual “State of the Air” report highlights air quality in Boston-Worcester-Providence, MA-RI-NH-CT metro area and across the nation

Boston-Worcester-Providence, MA-RI-NH-CT metro area was named 48th most polluted in the nation for ozone pollution but third worst in the northeast region, according to the American Lung Association’s 2024 “State of the Air” report, which was released today. The report also found that the year-round measure of particle pollution worsened slightly making it the second worst metro area in the region.

The Lung Association’s 25th annual “State of the Air” report grades exposure to unhealthy levels of ground-level ozone air pollution, annual particle pollution and short-term spikes in particle pollution over a three-year period. This year’s report includes air quality data from 2020-2022 and is updated to reflect the new annual particle pollution standard that the U.S. Environmental Protection Agency (EPA) finalized in February.

“In the 25 years that the American Lung Association has been doing our ‘State of the Air’ report, we have seen incredible improvement in the nation’s air quality. Unfortunately, more than 131 million people still live in places with unhealthy levels of air pollution, and the Boston-Worcester-Providence metro area still has work to do,” said Daniel Fitzgerald, Director of Advocacy for the American Lung Association. “Climate change is making air pollution more likely to form and more difficult to clean up. so there are actions we can and must take to improve air quality, including continuing the implementation of Advanced Clean Cars II and Advanced Clean Trucks rules and calling on EPA to set long-overdue stronger national limits on ozone pollution.”

Ground-level Ozone Pollution in the Boston-Worcester-Providence metro area: 
The “State of the Air” report looked at levels of ozone “smog,” the air pollutant affecting the largest number of people in the United States. The Boston-Worcester-Providence metro area ranked 48th worst in the nation for ozone pollution. The ranking was based on the area’s worst county’s average number of unhealthy days—3 days per year, a D grade, in Washington County, Rhode Island. This was worse than the area's ranking in last year's report of 52nd worst, with 2.2 days per year, a D grade.  

Particle Pollution in the Boston-Worcester-Providence metro area: 
The report also tracked short-term spikes in particle pollution, which can be extremely dangerous and even deadly. The Boston-Worcester-Providence metro area ranked 101st worst in the nation for short-term particle pollution. The ranking was based on the area’s worst county’s average number of unhealthy days—0.8 days per year, a B grade, in Middlesex County, Massachusetts. This was better than the area's ranking in last year's report of 95th worst, with 0.8 days per year, a B grade.  

For the year-round average level of particle pollution, the area’s worst county, Worcester County, Massachusetts, received a passing grade for pollution levels below the federal standard that was recently updated by the United States Environmental Protection Agency. The Boston-Worcester-Providence metro area ranked 90th worst in the nation. This was worse than the area's ranking in last year's report of 96th worst in the nation. 

In addition to the Boston-Worcester-Providence metro area, other notable findings across Massachusetts include: 

  • Bristol County, MA received a ‘C-grade’ for High Ozone Days with a total of 6 orange days
  • Barnstable, MA received a ‘C-grade’ for High Ozone Days with a total of 5 orange days
  • Essex County, MA received a ‘C-grade’ for High Ozone Days with a total of 4 orange days

The “State of the Air” report found that nationally, more than 131 million people live in an area that received a failing grade for at least one measure of air pollution, and 43.9 million people live in areas with failing grades for all three measures. In the three years covered by this report, individuals in the U.S. experienced the highest number of days when particle pollution reached “very unhealthy” and “hazardous” levels in the history of reporting the “State of the Air.” Communities of color are disproportionately exposed to unhealthy air and are also more likely to be living with one or more chronic conditions that make them more vulnerable to air pollution, including asthma, diabetes and heart disease. The report found that a person of color in the U.S. is more than twice as likely as a white individual to live in a community with a failing grade on all three pollution measures.

Both ozone and particle pollution can cause premature death and other serious health effects such as asthma attacks, heart attacks, strokes, preterm births and impaired cognitive functioning later in life. Particle pollution can also cause lung cancer. 

In an effort to clean up the air across the Commonwealth, Massachusetts must continue to implement Advanced Clean Cars II and Advanced Clean Trucks rules and work to incentivize and expedite a transition to zero-emission vehicles accessible to all included infrastructure for charging, zero-emission school buses, commuter rails, and more. 

EPA recently finalized new air pollution rules that will help clean up particle pollution and address climate change. Now, the Lung Association is urging EPA to set long overdue stronger national limits on ozone pollution. Stronger limits would help people protect themselves and drive cleanup of polluting sources across the country. See the full report results and sign the petition at Lung.org/SOTA.

Get involved and help the mission of American Lung Association. The LUNG FORCE Walk in Boston is coming up on October 19th. Register today at Lungforce.org/Boston

For more information, contact:

Jennifer Solomon
(516) 680-8927
[email protected]

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