New Hampshire, Massachusetts, and Maine are having action days. Fine particulate matter concentrations are expected to reach “moderate” to “unhealthy for sensitive groups” levels. Please refer to EPA AIRNow for further details on the description of an “action day”.
The New Hampshire Department of Environmental Services (DES) has released a press statement (archived) regarding the air quality. Pollution from local sources (i.e. residential wood burning) along with transport from neighboring states are likely responsible for the elevated levels. Also, refer to air quality forecasts for Massachusetts (source: The Official Website of the Commonwealth of Massachusetts - archived) and Maine (source: Department of Environmental Protection - archived).
Stay linked to the blog for an update on the nations air quality.
*Image source – EPA AIRNow