ACADIA NAT’L PARK — During the 2009 reporting season, which extends from April through September, ozone levels on Mount Desert Island exceeded the federal standard of 75 parts per billion on only two days, May 21 and Aug. 18.
On those days, exceedences were recorded at the monitors on both Cadillac Mountain and McFarland Hill.
In 2008, there was only one exceedence and that occurred on Cadillac. The Environmental Protection Agency attributes the drop in ozone exceedences to the cool, wet summer, particularly in June.
The majority of ground-level ozone coming into Maine arrives on plumes of air from areas south and west of here
For more environmental news, pick up a copy of the Mount Desert Islander.
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