Overview
Top of Cadillac Mountain (Fenced Enclosure) is an air monitoring station in Maine, USA, operated by the Maine DEP Bureau of Air Quality Control. It provides ambient air quality data for Acadia National Park and the surrounding region.
Top of Cadillac Mountain (Fenced Enclosure) is an air monitoring station located atop Cadillac Mountain in Acadia National Park, Hancock County, Maine, United States. The station is operated by the Maine Department of Environmental Protection Bureau of Air Quality Control and is part of the broader US EPA Air Quality System (AQS) network, which monitors criteria pollutants and other atmospheric parameters to ensure compliance with National Ambient Air Quality Standards (NAAQS). The station's high-elevation siting (1,530 feet) provides representative background air quality data for the region, capturing long-range transport of pollutants and regional haze. As part of the IMPROVE network (Interagency Monitoring of Protected Visual Environments), it likely measures fine particulate matter (PM2.5), ozone, and visibility-related parameters. The Maine DEP Bureau of Air Quality Control ensures data reporting continuity and adherence to EPA quality assurance protocols. This monitoring station plays a critical role in assessing air quality impacts on sensitive ecosystems in Acadia National Park, including visibility degradation and acid deposition. Data from this site supports regulatory decisions, public health advisories, and research on atmospheric chemistry in the northeastern United States. Its remote location minimizes local anthropogenic influences, making it valuable for studying background pollution levels.
Environmental context
The station's location on Cadillac Mountain, the highest point on the U.S. Atlantic coast, provides a unique vantage for monitoring regional air quality. It is part of the IMPROVE network, which focuses on visibility and haze in protected areas. The site measures fine particulate matter (PM2.5), ozone, and meteorological parameters, contributing to understanding of long-range transport of pollutants from urban and industrial sources. This data supports the Regional Haze Rule and helps assess ecosystem impacts such as acid rain and nutrient deposition in Acadia National Park.
Frequently asked questions
The station is located at the summit of Cadillac Mountain in Acadia National Park, Hancock County, Maine, United States, at coordinates 44.351697 N, -68.226980 W.
As part of the IMPROVE network, the station measures fine particulate matter (PM2.5), ozone, and visibility-related parameters. It may also monitor meteorological conditions and other criteria pollutants.
The station is operated by the Maine Department of Environmental Protection Bureau of Air Quality Control, which ensures data quality and reporting to the EPA Air Quality System.
The high-elevation site provides background air quality data representative of the northeastern U.S., helping to track long-range pollutant transport, regional haze, and impacts on sensitive ecosystems in Acadia National Park.
The station operates under the U.S. Clean Air Act and EPA regulations, including the National Ambient Air Quality Standards (NAAQS) and the Regional Haze Rule. Data is reported to the EPA Air Quality System (AQS).
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