AQI Key: (View by ParametersCategorize Sites by Parameter with Hourly Concentrations) (Learn about the Air Quality Index (AQI) from the EPA) OfflineSite Expected but currently missing data for ALL AQI categories (current hour only)
GoodAQI is Good with few exceptions ModerateAQI is Acceptable with a few exceptions Unhealthy for Sensitive GroupsSensitive Groups may have Adverse Health Effects UnhealthyEveryone may have Adverse Health Effects Very UnhealthyTriggers Serious Health Alert HazardousTriggers Emergency Conditions Alert
........Button below left plays last 24 hours . Move time window with arrow buttons below right.

Note: APCD real-time monitoring network is set to run on Mountain Standard Time (MST) year-round

Not shown are non real-time sites which use filter samples (which require laboratory analysis)

Air Quality Index (AQI) values not validated. Please visit the EPA for validated data

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