Ft. Cronkhite Air Monitoring Station, Marin County, California

Ft. Cronkhite is an air monitoring station located at Building 1111 in the Ft. Cronkhite area of Marin County, California. Operated by the Bay Area Air Quality Management District, this station is part of the broader US EPA Air Quality System (AQS) network, which monitors ambient air quality across the United States. The station's coastal location provides valuable data on air quality in a region influenced by marine air and urban emissions from the San Francisco Bay Area. As an air monitoring station, Ft. Cronkhite measures criteria pollutants such as ozone, particulate matter, and nitrogen dioxide, in accordance with the National Ambient Air Quality Standards (NAAQS). The station's siting is representative of a coastal environment, contributing to the understanding of pollutant transport and dispersion. The last reported sample date is December 31, 2022, indicating ongoing data collection. The data from Ft. Cronkhite supports the Bay Area Air Quality Management District's efforts to assess compliance with federal air quality standards and to inform public health advisories. This station plays a key role in the regional monitoring network, helping to characterize air quality in a diverse geographic area that includes urban, suburban, and natural landscapes.

Ft. Cronkhite's coastal location in Marin County provides a unique environmental context for air monitoring. The station captures air quality influenced by marine air masses, which can affect pollutant dispersion and chemistry. The region experiences seasonal variations, including summer fog and winter inversions, that impact pollutant levels. Monitoring at this site helps assess the transport of pollutants from the San Francisco Bay Area and the influence of local sources such as traffic and residential emissions. The data contributes to understanding regional air quality trends and supports regulatory compliance with the Clean Air Act.