Overview
ON BUILDING is an air monitoring station in Los Angeles, California, operated under the US EPA National Exposure Research Lab. It contributes to the national air quality surveillance network.
ON BUILDING is an air monitoring station located at 434 S San Pedro St in Los Angeles, California. It is part of the United States Environmental Protection Agency's (US EPA) National Exposure Research Laboratory network, which supports the national Air Quality System (AQS) by collecting ambient air quality data. The station is situated in a dense urban environment, representative of the Los Angeles basin's complex air pollution patterns. The station operates under the US EPA's regulatory framework, which includes the National Ambient Air Quality Standards (NAAQS) for criteria pollutants such as ozone, particulate matter, carbon monoxide, nitrogen dioxide, sulfur dioxide, and lead. Air monitoring stations like ON BUILDING typically measure a subset of these pollutants using federal reference methods or equivalent methods. The station's siting follows EPA guidelines to ensure data representativeness for population exposure and regulatory compliance. As part of the Los Angeles County Air Pollution Control District's monitoring network, ON BUILDING provides critical data for assessing air quality trends, issuing health advisories, and evaluating the effectiveness of emission reduction strategies. The station's long-term operation supports continuity in reporting, which is essential for tracking progress toward meeting NAAQS and for public health protection in one of the most populous regions of the United States.
Environmental context
Los Angeles faces significant air quality challenges due to high population density, heavy traffic, industrial emissions, and geographic conditions that trap pollutants. The ON BUILDING station monitors criteria pollutants to assess compliance with NAAQS and to inform local air quality management. Its urban siting captures population exposure, while the network's design ensures spatial coverage across the basin. Parameter coverage typically includes ozone, PM2.5, and nitrogen dioxide, with speciation and meteorological measurements at select sites.
Frequently asked questions
The ON BUILDING air monitoring station is located at 434 S San Pedro St, Los Angeles, California, United States.
As part of the US EPA National Exposure Research Lab network, ON BUILDING measures ambient concentrations of criteria air pollutants such as ozone, particulate matter, and nitrogen dioxide to support air quality assessments.
The station is operated under the US EPA National Exposure Research Laboratory, which coordinates with local agencies like the Los Angeles County Air Pollution Control District.
Air monitoring stations in the US operate under the Clean Air Act, with monitoring requirements defined by the EPA's Air Quality System (AQS) and National Ambient Air Quality Standards (NAAQS).
Los Angeles has historically high levels of air pollution due to traffic, industry, and geography. Continuous monitoring helps track compliance with health-based standards, issue alerts, and guide emission reduction policies.
Other Air Monitoring Station plants in United States · 6 nearby