BOSTON — Environmental officials say New Englanders experienced an overall decrease in the number of unhealthy air quality days this year during the summer ozone season.
Between April and September 2013, air quality monitors recorded 20 days when ozone levels in New England exceeded levels considered healthy, compared to 29 days during the same period in 2012.
The U.S. Environmental Protection Agency said the downward trend started about 30 years ago and is due to reductions in the emissions that form ozone.
In 1983, New England had 113 unhealthy days, compared to 20 this year.
Maine was the only state to see a rise in unhealthy days, recording 5 in 2013, up from 4 the year before. Vermont had no unhealthy days either year.
Send questions/comments to the editors.
Success. Please wait for the page to reload. If the page does not reload within 5 seconds, please refresh the page.
Enter your email and password to access comments.
Hi, to comment on stories you must . This profile is in addition to your subscription and website login.
Already have a commenting profile? .
Invalid username/password.
Please check your email to confirm and complete your registration.
Only subscribers are eligible to post comments. Please subscribe or login first for digital access. Here’s why.
Use the form below to reset your password. When you've submitted your account email, we will send an email with a reset code.