Overview
STILWELL is an air monitoring station in Cherry Tree, Oklahoma, part of the CASTNET network. It provides long-term data on air quality and atmospheric deposition, operated by Mactec, Inc.
STILWELL is an air monitoring station located in Cherry Tree, Adair County, Oklahoma, United States. It operates under the Clean Air Status and Trends Network (CASTNET), a national program that monitors ambient air quality and atmospheric deposition to assess the effectiveness of emission reduction programs. The station collects data on criteria pollutants and other atmospheric parameters, contributing to the U.S. EPA's Air Quality System (AQS). CASTNET sites are typically sited in rural areas to represent regional background conditions, and STILWELL follows this standard. The reporting agency is Mactec, Inc., which ensures data quality and continuity. As part of a long-term monitoring network, STILWELL supports research on air pollution trends and ecosystem impacts. Its data helps inform regulatory decisions under the Clean Air Act and provides valuable context for understanding regional air quality in the southern United States.
Environmental context
The STILWELL station is situated in a rural area of eastern Oklahoma, near the Ozark Mountains. This region experiences a mix of agricultural and forested land uses, with potential influences from local biomass burning and long-range transport of pollutants. The station's location provides representative background measurements for the region, supporting assessments of regional haze, acid deposition, and ozone levels. CASTNET's focus on atmospheric deposition is particularly relevant here, as the area's ecosystems may be sensitive to nitrogen and sulfur inputs.
Frequently asked questions
The STILWELL station is located at South Highway 59, RR1, 1795 Dahlonegah Park Road, Stilwell, Oklahoma, in Adair County, near the town of Cherry Tree.
STILWELL is part of the Clean Air Status and Trends Network (CASTNET), which monitors ambient air quality and atmospheric deposition across the United States.
As a CASTNET station, STILWELL typically measures ozone, sulfur dioxide, nitrogen oxides, particulate matter, and atmospheric deposition of sulfur and nitrogen compounds.
CASTNET data is used by the U.S. EPA to evaluate the effectiveness of emission reduction programs under the Clean Air Act, including the Acid Rain Program and Regional Haze Rule.
The station is operated by Mactec, Inc., under contract with the U.S. EPA, ensuring consistent data collection and quality assurance.
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