ACADIA NATIONAL PARK — The Maine Department of Environmental Protection has forecast ozone to reach unhealthful levels for sensitive groups today, Friday, July 22 along the Mid-Coast regions of Maine, including all parts of Acadia National Park.
An air-quality advisory was issued to park employees last night at midnight.
It states: Air pollution in the park is expected to reach, or has reached Unhealthy levels. Park staff who may be particularly sensitive to air pollution effects include employees actively working outdoors and those with respiratory diseases should avoid strenuous or prolonged outdoor activities and should limit their exposure until air quality has returned to
Weather conditions are setting up to bring ozone and its precursors to the Maine coast at high enough levels that they are expected to reach the Unhealthy for Sensitive Groups range for the coast from Kittery through Acadia with moderates around those regions and in the Mountains and Northern Maine. Particle pollution levels should remain low.
Ozone is created via a chemical reaction in the atmosphere between sunlight and pollution from states to the west, in particular automobile exhaust and power plant emissions.
Although the air quality is expected to be bad on Friday, the overall air pollution picture in Maine has improved over recent years. In 1988, Maine would have had more than 40 days that exceeded the standard. In 2015, there were two exceedances, zero in 2014 and 2012 and one in 2013.