GREENWOOD Air Monitoring Station, Phoenix, Arizona | Environmental Monitoring

GREENWOOD is an air monitoring station located at 1128 N. 27th Ave in Phoenix, Arizona, within Maricopa County. Operated by Maricopa County Air Quality, this station is part of the broader US EPA Air Quality System (AQS) network, which monitors ambient air quality across the United States. The station plays a role in assessing compliance with National Ambient Air Quality Standards (NAAQS) for criteria pollutants such as ozone, particulate matter, and nitrogen dioxide. The station operates under the regulatory framework of the Clean Air Act, with data reported to the EPA's AQS database. In Arizona, air monitoring is critical due to the state's arid climate and growing urban population, which can exacerbate ozone and particulate pollution. The station's location in Phoenix, a major metropolitan area, ensures representative sampling of urban air quality. Typical monitoring equipment includes continuous analyzers for gaseous pollutants and filter-based samplers for particulate matter. GREENWOOD's data supports public health advisories and regulatory decisions in Maricopa County. The station contributes to long-term trend analysis and helps identify pollution sources, such as traffic and industrial emissions. Its operational status ensures ongoing compliance with federal standards, benefiting local communities by providing actionable air quality information.

Phoenix, Arizona, experiences a hot desert climate with frequent temperature inversions that trap pollutants near the ground, making air quality monitoring essential. The region faces challenges from ozone and particulate matter, driven by vehicle emissions, dust, and industrial activity. GREENWOOD's monitoring of criteria pollutants under the EPA AQS network helps track these trends and supports public health alerts. The station's urban siting provides representative data for population exposure assessments.