Longview Air Monitoring Station, Gregg County, Texas | United States Environmental Monitoring

Longview is an air monitoring station located at Gregg County Airport near Longview, Texas, United States. It is part of the U.S. EPA's Air Quality System (AQS) network, which tracks criteria pollutants and other atmospheric parameters to ensure compliance with National Ambient Air Quality Standards (NAAQS). The station is operated by the Texas Commission on Environmental Quality (TCEQ), the state agency responsible for environmental regulation. The station provides continuous ambient air quality data, typically measuring pollutants such as ozone, particulate matter (PM2.5 and PM10), nitrogen dioxide, sulfur dioxide, carbon monoxide, and lead. Monitoring follows EPA-approved methods and quality assurance protocols. The last reported sample date is August 31, 2025, indicating recent operational status. As part of a statewide network, Longview contributes to regional air quality assessments and public health advisories. Located in Gregg County, the station serves the Longview metropolitan area, which has industrial activity including oil refining and manufacturing. The data supports regulatory compliance, trend analysis, and community exposure estimates. The station's location near an airport also helps characterize emissions from aviation sources. Its role is critical for understanding local air quality dynamics and informing policy decisions.

The Longview station monitors criteria pollutants and may include speciation or meteorological parameters, depending on site configuration. Siting near an airport and industrial areas ensures representativeness of urban and source-influenced air quality. Reporting continuity is maintained through TCEQ's adherence to EPA AQS standards, providing reliable long-term data for trend analysis and regulatory compliance.