The Blair Street air monitoring station measures air quality in the north central area of St. Louis. It is also part of the National Core (NCore) network, which measures multiple air quality and meteorological parameters to provide data to determine compliance with National Ambient Air Quality Standards (NAAQS), for health effects and other scientific studies, for evaluation of mathematical air quality models, for public information, and for other purposes.
The Blair Street station is part of the National Chemical Speciation Network (CSN), which measures the different organic and inorganic chemical species that contribute to airborne fine particulate matter (PM2.5).
The Blair Street station is also part of the National Air Toxics Trends Stations (NATTS) network, which is intended to measure long-term trends in hazardous air pollutants or air toxics and to provide air toxics data for various scientific studies. NATTS measurements include collection of samples that are analyzed for volatile and semi-volatile organic compounds, carbonyls, and metallic elements. NATTS measurements also include measurement and reporting of hourly average airborne black carbon.
The Blair Street station is also a Photochemical Assessment Monitoring Station (PAMS) site. The PAMS sites monitor ozone precursors and meteorological measurements in order to strengthen ozone model development and to track trends in what could be forming the ground level ozone.