NORTHBROOK WATER PLANT Air Monitoring Station, Northbrook, Illinois

NORTHBROOK WATER PLANT is an air monitoring station located at 750 Dundee Road in Northbrook, Illinois, within Cook County. Operated by the Illinois Environmental Protection Agency, this facility is part of the broader US EPA Air Quality System (AQS) network, which monitors criteria pollutants and other atmospheric parameters across the United States. The station operates under the regulatory framework of the Clean Air Act and EPA ambient air quality standards. As a fixed monitoring site, it likely measures pollutants such as ozone, particulate matter (PM2.5 and PM10), nitrogen dioxide, sulfur dioxide, carbon monoxide, and lead, depending on its specific instrumentation. The Illinois EPA maintains a network of stations to ensure compliance with National Ambient Air Quality Standards (NAAQS) and to provide data for public health assessments. Located in a suburban area near Chicago, this station plays a key role in characterizing air quality in the region, which is influenced by urban emissions, industrial activity, and transportation. Continuous data from such stations support regulatory decision-making, public health advisories, and long-term trend analysis for environmental management.

The Northbrook area is part of the Chicago metropolitan region, where air quality is influenced by a mix of industrial, vehicular, and residential emissions. Monitoring stations like this one are critical for tracking criteria pollutants and assessing compliance with NAAQS. The station's siting is designed to be representative of population exposure, and its data contribute to regional air quality indices and regulatory reporting under the EPA AQS framework.