ACADIA NATIONAL PARK — The Maine Department of Environmental Protection (MDEP) has forecast ozone to reach an unhealthy level for sensitive groups on Tuesday, Aug. 18, for the Southwest and Mid-Coast regions of Maine, including all regions of Acadia National Park.
An air quality advisory for all of the park went into effect at midnight Monday night. Typically the highest readings for ozone occur at a monitoring station on top of Cadillac Mountain.
Air pollution, in particular ozone, in the park is expected to reach unhealthy levels. People who may be particularly sensitive to air pollution effects include those actively working outdoors and those with respiratory diseases.
Sensitive individuals should avoid strenuous or prolonged outdoor activities and should limit their exposure until air pollution has returned to healthy levels.
Particle pollution is forecast to be moderate for the entire state, so the combined effects of the two pollutants (and the high temperatures) may be more significant for those in the sensitive category.
Ozone in Acadia is carried in on prevailing winds from the west. It is created due to a chemical reaction between sunlight and pollution emitted by electrical generating plants and automotive exhaust.