Donovan Air Monitoring Station, Otay Mesa, California | Environmental Monitoring

Donovan is an air monitoring station located at 480 Alta Road in Otay Mesa, California, within San Diego County. The station is operated by the San Diego County Air Pollution Control District and is part of the unofficial Photochemical Assessment Monitoring Stations (PAMS) network, which focuses on measuring ozone precursors and other pollutants. The station operates under the regulatory framework of the US EPA Air Quality System (AQS), which sets standards for criteria pollutants such as ozone, particulate matter, and nitrogen oxides. As a PAMS site, Donovan likely measures speciated volatile organic compounds and carbonyls, in addition to standard meteorological parameters. The last reported sample date is December 27, 2021, indicating recent operational status. Donovan contributes to the regional air quality monitoring network in San Diego County, which is important for assessing compliance with National Ambient Air Quality Standards (NAAQS) and informing public health advisories. The station's location in Otay Mesa, near the US-Mexico border, provides valuable data on cross-border pollution transport and local industrial emissions.

The Otay Mesa area is characterized by a mix of industrial, commercial, and residential land uses, with proximity to the US-Mexico border and major transportation corridors. Air monitoring in this region focuses on criteria pollutants such as ozone and particulate matter, as well as toxic air contaminants. The station's siting is representative of urban-influenced background conditions, and its data supports local air quality management and regulatory compliance under the Clean Air Act.