Map Key:

(Learn more about the Air Quality Index (AQI) categories from the EPA)

Real-time AQI Not Available**

Good

Moderate

Unhealthy for sensitive groups

Unhealthy

Extremely poor

Hazardous

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Only active CDPHE air quality monitoring sites are shown on this map.

**Real-time AQI values are not available at some monitoring sites such as those where the air samples must be analyzed in a laboratory after they are collected.