This website uses cookies. By continuing you are agreeing to our privacy policy.

Connecticut Air Quality Ranked Worst in Eastern US, Finds 2018 ‘State of the Air’ Report

96% of Connecticut residents’ health remains at risk from unhealthy air, according to American Lung Association’s 19th annual air quality report

Trend charts and rankings for metropolitan areas and county grades are available at

(April 18, 2018) - EAST HARTFORD, Conn.

For more information please contact:

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

The American Lung Association’s 2018 “State of the Air” report found Connecticut’s air quality ranked among the worst of any area east of the Mississippi River. Fairfield County ranked as the #19 most ozone-polluted county in the country and the only one in the list of 25 most ozone-polluted counties not in the Western states; and the city of Hartford ranked as the 20th most polluted city in the nation for ozone. Of the 8 counties monitored, 7 received failing grades for ozone and 1 received a D grade.

“The 2018 ‘State of the Air’ report finds that unhealthful levels of ozone found throughout Connecticut puts our residents at risk for premature death and other serious health effects such as asthma attacks and greater difficulty breathing for those living with a lung disease like COPD. The Northeast suffers because much of the country’s air pollution ends up settling here, earning the moniker ‘the tailpipe of the nation.’” said Jeff Seyler, Chief Division Officer of American Lung Association. “Across the nation, the report found continued improvement in air quality, but still, more than four in 10 Americans – 133.9 million – live in counties that have unhealthful levels of either ozone or particle pollution, where their health is at risk.”

The trends reported in this year’s report, which covers data collected by states, cities, counties, tribes and federal agencies in 2014-2016, reflect the ongoing challenges to reduce each pollutant in the changing political and outdoor climate.

“Almost every single resident of Connecticut is being exposed to unhealthy levels of ozone air pollution, which includes almost 83,000 children with asthma, over 296,000 adults with asthma, over 167,000 with COPD and more than 2100 with lung cancer. We can and should do more to save lives,” said Ruth Canovi, Director of Public Policy for the American Lung Association in Connecticut.  “The Lung Association in Connecticut calls on our members of Congress to defend the Clean Air Act, currently under threat from those who want to weaken this effective public health law. We also call on the U.S. Environmental Protection Agency to implement and enforce the law instead of trying to roll back major safeguards like the Clean Power Plan and cleaner cars, both steps that help us fight climate change and reduce air pollution.” 

Each year the “State of the Air” provides a report card on the two most widespread outdoor air pollutants, ozone pollution, also known as smog, and particle pollution, also called soot. The report analyzes particle pollution in two ways: through average annual particle pollution levels and short-term spikes in particle pollution. Both ozone and particle pollution are dangerous to public health and can increase the risk of premature death and other serious health effects such as lung cancer, asthma attacks, cardiovascular damage, and developmental and reproductive harm.

Ozone Pollution
Compared to the 2017 report, Litchfield, Middlesex, New Haven, New London, and Windham counties all experienced more high ozone days. Fairfield experienced the same amount, but had a higher weighted average of ozone from 2014-2016.  Only Tolland County reported less high ozone days for the 2018 report

The Hartford – West Hartford metro area ranked 20th for most polluted for ozone, showing worse ozone and more unhealthy air days than the 2017 report.

“Ozone especially harms children, older adults and those with asthma and other lung diseases,” said Canovi. “When older adults or children with asthma breathe ozone-polluted air, too often they end up in the doctor’s office, the hospital or the emergency room. Ozone can even shorten life itself.”

This report documents how warmer temperatures brought by climate change make ozone more likely to form and harder to clean up. This year’s report showed that ozone levels increased in most cities nationwide, in large part due to warmer temperatures in 2016, the second hottest year on record in the U.S. Over the past decades, ozone pollution has decreased nationwide because the nation has cleaned up major sources of the emissions that create ozone, especially coal-fired power plants and vehicles.

Particle Pollution
The 2018 report also found year-round particle pollution levels slightly lower in New Haven and Hartford, but slightly higher in Fairfield than the 2017 report. Nationwide, the best progress in this year’s report came in reducing year-round levels of particle pollution.  The Hartford – West Hartford metro area recorded its lowest ever year-round particle pollution, tying for 146th most polluted city. 

“Particle pollution is made of soot or tiny particles that come from coal-fired power plants, diesel emissions, wildfires and wood-burning devices. These particles are so small that they can lodge deep in the lungs and trigger asthma attacks, heart attacks and strokes, and can even be lethal,” said Canovi. “Year-round particle pollution levels have dropped thanks to the cleanup of coal-fired power plants and the retirement of old, dirty diesel engines.”

“State of the Air” 2018 also tracked short-term spikes in particle pollution, as these can be extremely dangerous and even lethal. The report found that Connecticut counties had better grades for short-term particle pollution, receiving three As, two Bs and one C. Litchfield County did decline from an A grade in 2017 to a B grade in this year’s report.

While the report examined data from 2014-2016, this 19th annual report provides online information on air pollution trends back to the first report covering 1996-1998. Learn more about Connecticut rankings, as well as air quality across the state and the nation, in the 2018 “State of the Air” report at


About the American Lung Association

The American Lung Association is the leading organization working to save lives by improving lung health and preventing lung disease, through research, education and advocacy. The work of the American Lung Association is focused on four strategic imperatives: to defeat lung cancer; to improve the air we breathe; to reduce the burden of lung disease on individuals and their families; and to eliminate tobacco use and tobacco-related diseases. For more information about the American Lung Association, a holder of the coveted 4-star rating from Charity Navigator and a Gold-Level GuideStar Member, or to support the work it does, call 1-800-LUNGUSA (1-800-586-4872) or visit:

Red button with telephone
Ask An Expert

Questions about your lung health? Need help finding healthcare? Call 1-800-LUNGUSA.

Get help
Red button of two hand prints
We need your generous support

Make a difference by delivering research, education and advocacy to those impacted by lung disease.

Button of turquoise LUNG FORCE swirl

LUNG FORCE unites women and their loved ones across the country to stand together in the fight against lung cancer.

Get involved
Join the fight for healthy lungs and healthy air.
Donate Now.