Overview
Marcellus is an operational air monitoring station in Washington County, Pennsylvania, managed by the Pennsylvania Department of Environmental Protection. It provides ambient air quality data as part of the state's monitoring network.
Marcellus is an air monitoring station located at 220 Meddings Road in Washington County, Pennsylvania, within the United States. Operated by the Pennsylvania Department of Environmental Protection, this station is part of the state's ambient air quality monitoring network, which supports compliance with the U.S. EPA's National Ambient Air Quality Standards (NAAQS). The station's location in a rural area of southwestern Pennsylvania provides representative sampling for regional air quality assessment. The station collects data on criteria pollutants and other parameters as part of the Pennsylvania DEP's monitoring program. The most recent sample date recorded is March 26, 2025, indicating ongoing operation. While specific parameters measured are not detailed, typical air monitoring stations in Pennsylvania track pollutants such as ozone, particulate matter (PM2.5 and PM10), sulfur dioxide, nitrogen dioxide, carbon monoxide, and lead, in accordance with EPA requirements. This station contributes to the broader U.S. air quality monitoring infrastructure, which includes over 4,000 monitoring sites nationwide. Data from Marcellus supports public health protection by informing air quality forecasts, regulatory compliance assessments, and trend analysis. The station's rural siting helps characterize background air quality and potential transport of pollutants from nearby industrial and urban areas.
Environmental context
The Marcellus station is situated in Washington County, Pennsylvania, an area with a mix of rural landscapes and natural gas extraction activities. The local environmental context includes potential impacts from unconventional oil and gas development, which can contribute to volatile organic compounds and methane emissions. The station's monitoring helps assess regional air quality and detect any degradation from industrial sources. Its rural location provides a baseline for understanding background pollutant levels and long-range transport.
Frequently asked questions
The Marcellus air monitoring station is located at 220 Meddings Road in Washington County, Pennsylvania, United States.
The station is operated by the Pennsylvania Department of Environmental Protection (DEP), which manages the state's ambient air quality monitoring network.
Typical Pennsylvania DEP stations monitor criteria pollutants such as ozone, particulate matter, sulfur dioxide, nitrogen dioxide, carbon monoxide, and lead, in compliance with EPA NAAQS.
The station provides data used to assess compliance with the National Ambient Air Quality Standards (NAAQS) under the Clean Air Act, supporting air quality management and public health protection.
Washington County has natural gas extraction activities, and air monitoring helps detect potential emissions from these operations, ensuring regional air quality remains within safe limits.
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