07/20/2026
In addition to the five ๐๏ธ MDAQMD air monitoring stations located throughout the District (Barstow, Hesperia, Lucerne Valley, Trona, and Victorville) the district will occasionally install mobile monitoring stations to gather more localized data in targeted areas. All stations collect air quality data 24 hours a day, seven days a week, measuring pollutants such as ozone (Oโ), particulate matter (PMโโ and PMโ.โ
), nitrogen oxides (NOโ), and hydrogen sulfide (HโS). After validation, this data becomes part of the U.S. Environmental Protection Agencyโs Air Quality System (AQS), the national air quality database used for regulatory and planning purposes โ๏ธ โ๏ธ ๐ชด