Pasadena Air Monitoring Station - Los Angeles County, California

The Pasadena Air Monitoring Station is an operational air quality monitoring facility located at 752 S. Wilson Ave., Pasadena, California. It is operated by the South Coast Air Quality Management District (SCAQMD) and contributes to the US EPA's Air Quality System (AQS) network, which tracks criteria pollutants and other atmospheric parameters across the United States. The station collects ambient air samples to measure pollutants such as ozone, particulate matter, nitrogen dioxide, and others, in compliance with the National Ambient Air Quality Standards (NAAQS). As part of the SCAQMD network, it supports regional air quality management and public health advisories. The facility's last reported sample date is September 30, 2025, indicating ongoing data collection. Located in the Los Angeles Basin, the station serves a densely populated urban area with significant traffic and industrial emissions. Its data helps inform regulatory actions and community exposure assessments, supporting efforts to reduce smog and improve air quality in Southern California.

The Pasadena station operates in the South Coast Air Basin, a region with persistent ozone and particulate matter challenges due to high population density, vehicle emissions, and industrial activity. Its monitoring contributes to the SCAQMD's network, which includes over 30 stations tracking criteria pollutants and meteorological parameters. The site's representativeness is critical for assessing population exposure and compliance with federal standards.