Overview
Crater Lake National Park - Crater Lake Rim (CLR) is an air monitoring station in Oregon, United States, operated by the Oregon Department of Environmental Quality. It provides ambient air quality data for the pristine environment of Crater Lake Nati
Crater Lake National Park - Crater Lake Rim (CLR) is an air monitoring station located at Rim Village Drive in Klamath County, Oregon, within the boundaries of Crater Lake National Park. Operated by the Oregon Department of Environmental Quality, this station is part of the broader US EPA Air Quality System (AQS) monitoring network, which tracks criteria pollutants and other atmospheric parameters across the United States. The station is situated at an elevation of approximately 7,100 feet on the caldera rim, providing representative data for high-altitude, remote environments. As part of the Oregon DEQ's monitoring network, it likely measures ozone, particulate matter, and other pollutants to assess air quality in Class I areas, which are subject to the Prevention of Significant Deterioration (PSD) regulations under the Clean Air Act. The station's last reported sample date is June 30, 2025, indicating ongoing operations. Crater Lake National Park is renowned for its exceptional visibility and clean air, making this monitoring station critical for tracking long-term trends in background air quality. Data from CLR supports research on regional haze, climate change, and the impact of distant pollution sources on protected natural areas. The station's role is vital for ensuring that air quality standards are maintained in one of the United States' most iconic national parks.
Environmental context
Crater Lake National Park is a Class I area under the Clean Air Act, requiring the highest level of air quality protection. The CLR monitoring station is strategically placed to measure background air quality in a remote, high-altitude setting. Key parameters typically monitored include ozone, fine particulate matter (PM2.5), and visibility-reducing pollutants. The station's data helps assess regional haze and the influence of distant emission sources, such as wildfires or urban pollution, on this pristine environment. Continuous monitoring supports compliance with the EPA's AQS network standards and informs policy for protecting visibility and ecosystem health in national parks.
Frequently asked questions
The station is located at Rim Village Drive in Klamath County, Oregon, within Crater Lake National Park, at an elevation of approximately 7,100 feet on the caldera rim.
As part of the Oregon DEQ network, the station likely measures criteria pollutants such as ozone and particulate matter, as well as meteorological parameters, to assess air quality in this Class I area.
The station is operated by the Oregon Department of Environmental Quality (DEQ), which manages air quality monitoring across the state.
Crater Lake is a Class I area under the Clean Air Act, requiring protection from air pollution that could impair visibility or ecosystem health. Monitoring helps track regional haze and long-range pollutant transport.
The station operates under the US EPA Air Quality System (AQS) network and complies with the Clean Air Act, including the Prevention of Significant Deterioration (PSD) program for Class I areas.
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