Modesto-County Center Air Monitoring Station, Modesto, California | Environmental Monitoring

Modesto-County Center is an air monitoring station located at 921 Oakdale Road in Modesto, California, within Stanislaus County. Operated under the US EPA Air Quality System (AQS) framework, it contributes to the national network of ambient air quality monitoring stations. The station is part of California's extensive monitoring infrastructure, which is critical for assessing compliance with National Ambient Air Quality Standards (NAAQS). As an air monitoring station, Modesto-County Center typically measures criteria pollutants such as ozone, particulate matter (PM2.5 and PM10), carbon monoxide, sulfur dioxide, and nitrogen dioxide. The station's siting follows EPA guidelines to ensure representativeness of local air quality. Data from this station supports air quality management and public reporting through the EPA's AirNow platform. The station serves the Modesto metropolitan area, which experiences air quality challenges due to vehicle emissions, agricultural activities, and geographic factors like the Central Valley's topography. Continuous monitoring helps inform health advisories and emission reduction strategies. The station's operational status ensures ongoing data collection for regulatory compliance and community awareness.

Modesto-County Center operates in California's Central Valley, a region with significant air quality concerns due to a combination of mobile sources, agricultural emissions, and meteorological conditions that trap pollutants. The station's parameter coverage typically includes criteria pollutants, with potential for speciation monitoring depending on network priorities. Siting representativeness is critical for capturing population exposure and regional background levels. Reporting continuity through the AQS network ensures data availability for trend analysis and regulatory assessments.