Air Quality
In 2023, there were 39 moderately unhealthy days, 15 more than 2022.
Unfavorable movement since the last available data
Benchmark: The overall number of days classified as a health risk and the severity of risks will be maintained through 2030.
Overview
Preliminary data for 2023 show there were 39 moderate air quality days, up from 24 in 2022. The Maine Department of Environmental Protection attributes this increase to smoke from wildfires beyond Maine’s borders. There were no days that were unhealthy for sensitive groups (e.g., people with heart and lung disease, older adults, children).
After declining in the 1980s and 1990s, air quality in Maine has improved substantially and is better than most other states. Maine’s air quality index is based on ozone levels and reflects the number of days each year when the maximum ozone level recorded in the state reaches moderate or unhealthy levels. Maine’s air quality contributes to health and wellness and makes it an attractive place to live, do business, and visit. Air quality is subject to factors both within and beyond our borders.
Fig. A
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Maine Air Quality Index
Source: Maine Department of Environmental Protection