Overview
El Cajon - Lexington Elementary School is an operational air monitoring station in El Cajon, California, reporting to the California Air Resources Board. It contributes to the US EPA Air Quality System network.
El Cajon - Lexington Elementary School is an air monitoring station located at 533 First Street in El Cajon, California, within San Diego County. Operated under the California Air Resources Board, it is part of the broader US EPA Air Quality System (AQS) network, which monitors criteria pollutants and other parameters to ensure compliance with National Ambient Air Quality Standards (NAAQS). The station provides continuous ambient air quality data, supporting regulatory assessments and public health advisories. As a monitoring site in a suburban setting, it captures representative air quality conditions influenced by local sources such as traffic and industrial activities. The station's last reported sample date is June 30, 2025, indicating ongoing operations. Environmental monitoring in California is critical due to the state's diverse geography and population density. This station helps track pollutants like ozone, particulate matter, and nitrogen dioxide, contributing to regional air quality management and informing policy decisions to protect public health.
Environmental context
El Cajon is located in the inland region of San Diego County, where air quality can be affected by emissions from transportation, industrial sources, and seasonal wildfires. The monitoring station at Lexington Elementary School provides data on criteria pollutants such as ozone and PM2.5, which are key indicators of urban air quality. Its siting in a residential area ensures representative sampling of population exposure, supporting the California Air Resources Board's efforts to meet federal and state air quality standards.
Frequently asked questions
The air monitoring station is located at 533 First Street in El Cajon, California, within San Diego County.
As part of the California Air Resources Board network, it monitors criteria pollutants such as ozone, particulate matter, and nitrogen dioxide, in line with US EPA standards.
The station is operated under the California Air Resources Board (CARB), which manages air quality monitoring across the state.
Air monitoring stations in the US operate under the Clean Air Act, with data reported to the EPA's Air Quality System (AQS) to ensure compliance with National Ambient Air Quality Standards (NAAQS).
By providing continuous data on pollutant levels, the station helps assess local air quality trends, supports public health advisories, and informs regulatory actions to reduce emissions.
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