420 E. LAUREL ST. Air Monitoring Station, Willows, California | USA

420 E. LAUREL ST. is an air monitoring station located in Willows, California, United States. It is part of the California Air Resources Board (CARB) monitoring network, which supports federal and state air quality management programs. The station is operational and serves the Glenn County area. The station operates under the regulatory framework of the U.S. EPA Air Quality System (AQS), which sets standards for criteria pollutants such as ozone, particulate matter, carbon monoxide, nitrogen dioxide, sulfur dioxide, and lead. CARB's network includes both federal reference method (FRM) and federal equivalent method (FEM) monitors, ensuring data comparability and quality assurance. The station likely measures a subset of these pollutants, though specific parameters are not detailed. As part of California's comprehensive air monitoring network, this station provides critical data for assessing compliance with National Ambient Air Quality Standards (NAAQS) and for informing public health advisories. Its location in Willows, a rural agricultural area, helps characterize regional air quality patterns and the influence of local sources such as farming and transportation.

Willows is located in the Sacramento Valley, an area with a Mediterranean climate that can experience temperature inversions, trapping pollutants near the ground. Agricultural activities, including crop burning and dust from tilling, contribute to particulate matter levels. The station's siting is representative of rural background conditions, complementing urban monitors in nearby cities like Chico and Sacramento. Monitoring data from this station supports the state's efforts to reduce ozone and PM2.5 concentrations under the California Clean Air Act.