DYSART Air Monitoring Station, Surprise, Arizona | United States

DYSART is an air monitoring station located at 16825 N. Dysart Road in Surprise, Arizona, within Maricopa County. The station is part of the Maricopa County Air Quality Department's monitoring network, which tracks ambient air pollution levels across the Phoenix metropolitan area. As a fixed-site monitor, it contributes to the U.S. EPA's Air Quality System (AQS) database, supporting regulatory compliance and public health awareness. The station operates under the framework of the Clean Air Act and EPA monitoring regulations. Maricopa County Air Quality manages a network of stations that measure criteria pollutants such as ozone, particulate matter (PM10 and PM2.5), carbon monoxide, nitrogen dioxide, and sulfur dioxide. The DYSART station's last reported sample date is September 30, 2025, indicating ongoing data collection. Typical monitoring technology includes continuous analyzers and filter-based samplers, with data reported to the EPA's AQS. Located in the rapidly growing West Valley of Phoenix, the DYSART station helps characterize air quality in a suburban area influenced by urban development, traffic, and regional meteorological patterns. The data supports air quality index reporting, health advisories, and state implementation plans for attaining federal standards. This monitoring is vital for protecting public health in a region prone to high ozone and particulate matter episodes.

The DYSART station operates in Maricopa County, which is designated as a nonattainment area for ozone and PM10 under the Clean Air Act. The station's siting is representative of suburban exposure near major transportation corridors and developing residential areas. Monitoring focuses on criteria pollutants, with potential for future speciation or meteorological measurements to support air quality modeling and source apportionment studies.