Parameter Key**: (View by AQICategorize Sites by Current AQI Values) (Learn more about Parameters reported by APCD) Site OfflineSite Expected but Missing Data for ALL Criteria Pollutant Parameters
COCarbon Monoxide Sites NO2Nitrogen Dioxide sites O3Ozone Sites PM10Particulate Matter 10 Micron Sites PM25Particulate Matter 25 Micron Sites SO2Sulfer Dioxide Sites Filter-based Sites**Sites where Filter Samples are Collected Manually Show/Hide AllAll But Offline Sites
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*The real-time concentrations at sites where filter samples are collected (which require lengthy laboratory analysis) are not shown.

**This map may have compatibility issues with some browser and operating system combinations.

***The APCD monitoring network is set to run on Mountain Standard Time (MST) year-round.