Overview
Calexico-Grant Street is an operational air monitoring station in Calexico, California, operated by the California Air Resources Board. It monitors ambient air quality in the Imperial County region.
Calexico-Grant Street is an air monitoring station located at 900 Grant Street in Calexico, California, within Imperial County. Operated by the California Air Resources Board (CARB), it is part of the state's extensive air quality monitoring network. The station is operational and contributes to the U.S. EPA's Air Quality System (AQS) network, which tracks criteria pollutants and other atmospheric parameters. As part of CARB's network, the station likely measures pollutants such as ozone, particulate matter (PM2.5 and PM10), nitrogen dioxide, sulfur dioxide, carbon monoxide, and lead, in accordance with the National Ambient Air Quality Standards (NAAQS). The station's location in Calexico, near the U.S.-Mexico border, provides important data on cross-border air pollution transport and local emissions from transportation and agriculture. The environmental significance of this station lies in its role in protecting public health in a region with high rates of asthma and other respiratory conditions. Data from Calexico-Grant Street supports air quality management decisions, including attainment designations and emission reduction strategies. The station also contributes to the WMO Global Atmosphere Watch program through regional data sharing.
Environmental context
Calexico-Grant Street operates in the Imperial Valley, a region characterized by agricultural activity, high temperatures, and proximity to the U.S.-Mexico border. The area experiences elevated levels of particulate matter from dust and agricultural burning, as well as ozone from precursor emissions. The station's siting is representative of urban and near-road environments, providing critical data for assessing population exposure. Its reporting continuity through CARB ensures compliance with EPA monitoring requirements and supports regional air quality planning.
Frequently asked questions
Calexico-Grant Street is located at 900 Grant Street in Calexico, California, within Imperial County, near the U.S.-Mexico border.
As part of the California Air Resources Board network, the station likely monitors criteria pollutants including ozone, particulate matter (PM2.5 and PM10), nitrogen dioxide, sulfur dioxide, carbon monoxide, and lead.
The station is operated by the California Air Resources Board (CARB), which is the state agency responsible for air quality monitoring and regulation.
Air monitoring in the U.S. is governed by the Clean Air Act and implemented through the EPA's Air Quality System (AQS) network, which sets National Ambient Air Quality Standards (NAAQS) for criteria pollutants.
Calexico's location near the border and in an agricultural region makes it susceptible to cross-border pollution and local emissions. Monitoring helps protect public health and supports air quality management decisions.
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