Overview
Great River Bluffs is an IMPROVE air monitoring station in Winona County, Minnesota, operated by the National Park Service. It monitors regional air quality and visibility in the Upper Mississippi River Valley.
Great River Bluffs is an air monitoring station located in Winona County, Minnesota, within the United States. It is part of the Interagency Monitoring of Protected Visual Environments (IMPROVE) network, which focuses on assessing visibility impairment and particulate matter in Class I areas. The station is operated by the National Park Service and provides critical data on regional haze and air quality trends. The station operates under the regulatory framework of the U.S. Environmental Protection Agency's Air Quality System (AQS) and the Clean Air Act. As an IMPROVE site, it measures fine particulate matter (PM2.5) and its chemical speciation, including sulfates, nitrates, and carbonaceous compounds. These measurements support the Regional Haze Rule and help track progress toward visibility goals in protected landscapes. Great River Bluffs contributes to long-term environmental monitoring in the Upper Mississippi River Valley, a region influenced by agricultural emissions, urban pollution transport, and seasonal wildfires. The data collected aids in understanding regional air quality dynamics and supports public health and ecosystem protection efforts. Its continuous operation ensures a valuable record for regulatory compliance and scientific research.
Environmental context
The Upper Mississippi River Valley experiences a mix of air pollution sources, including agricultural ammonia emissions, industrial activities, and transported pollutants from urban centers. The IMPROVE network at Great River Bluffs focuses on visibility and fine particulate matter, which are critical for assessing regional haze and ecosystem health. The station's siting in a rural area provides representative background conditions, while its chemical speciation data helps identify source contributions and trends over time.
Frequently asked questions
Great River Bluffs is located in Winona County, Minnesota, United States, within the Great River Bluffs area near the Mississippi River.
As part of the IMPROVE network, Great River Bluffs measures fine particulate matter (PM2.5) and its chemical components, including sulfates, nitrates, and carbon, to assess visibility and air quality.
The station is operated by the National Park Service (NPS) as part of the IMPROVE network, which is a collaborative program involving federal and state agencies.
The Interagency Monitoring of Protected Visual Environments (IMPROVE) network monitors visibility and particulate matter in Class I areas (e.g., national parks) to track progress under the Regional Haze Rule of the Clean Air Act.
Data from Great River Bluffs supports the U.S. EPA's Air Quality System (AQS) and helps state and federal agencies assess compliance with National Ambient Air Quality Standards (NAAQS) and visibility goals.
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