Tracy-Airport Air Monitoring Station, Tracy, California | Environmental Monitoring

Tracy-Airport is an air monitoring station located at 5749 S. Tracy Blvd. in Tracy, California, within San Joaquin County. It is part of the United States Environmental Protection Agency's (EPA) Air Quality System (AQS) monitoring 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 San Joaquin Valley Unified Air Pollution Control District, a regional agency responsible for air quality management in California's Central Valley. The station's technical specifications include a last sample date of March 31, 2025, indicating recent reporting continuity. As an air monitoring station, it typically measures pollutants such as ozone, particulate matter (PM2.5 and PM10), nitrogen dioxide, sulfur dioxide, carbon monoxide, and lead, though specific parameters measured at this site are not detailed. The station operates under the regulatory framework of the Clean Air Act and the California Air Resources Board, which mandate rigorous monitoring protocols and data quality assurance. Environmental monitoring at Tracy-Airport supports public health protection by providing data used for air quality index (AQI) reporting, regulatory compliance, and trend analysis. The station's location in Tracy, a city in the San Joaquin Valley, an area with historically high ozone and particulate matter levels, makes its data critical for assessing regional air quality and informing emission reduction strategies. Its operational status ensures continuous data collection for the surrounding community.

The San Joaquin Valley faces significant air quality challenges due to a combination of geography, climate, and emissions from agriculture, transportation, and industry. The region experiences some of the highest ozone and particulate matter concentrations in the United States, often exceeding NAAQS. Monitoring stations like Tracy-Airport are essential for tracking pollutant levels, evaluating the effectiveness of control measures, and providing data for public health advisories. The station's siting near Tracy Airport and major roadways ensures representative sampling of urban and transportation-related emissions.