Volunteers said the problem began when Monongalia County condensed the committees overseeing the park into one.
In 2012, the Fairmont-Clarksburg metro area was tied for 24th on the list of cities with the most air pollution.
The American Lung Association has released its annual State of the Air Report.
Last year was the first time Fairmont and Clarksburg were on the list.
This year, Fairmont was dropped from the list.
The report is based on a three year average of data collected by the West Virginia Department of Environmental Protection's air monitoring system.