Denver-Boulder Air Quality Reaches Unhealthy for Sensitive Groups Level
Areazine synthesizes this EPA air-quality advisory directly from EPA's official public data feed. See our methodology for full source attribution and refresh cadence.
On March 12, 2026, the Denver-Boulder area recorded an AQI of 102, placing the air quality in the Unhealthy for Sensitive Groups category due to PM10 levels.
What this EPA air-quality advisory tells you, and what most readers miss
This notice was issued by EPA on April 6, 2026 and geographically references Denver-Boulder, CO. Its severity classification of "low" signals how the issuing agency weighs the risk of harm if no action is taken - "critical" and "high" tier alerts typically carry direct consumer actions, while "medium" and "low" tend toward informational guidance or monitoring advisories. The category it belongs to - Air Quality - determines the informational context it sits in, and which agency or body is the authoritative source for updates.
Most readers skim a notice like this, check whether they are personally affected, and move on. The more useful lens is to verify its scope, source, and timestamp, then compare related notices without assuming that one record proves a broader trend.
Areazine pairs this record with the original agency URL so you can check the primary source before acting. Its related labels are air-quality, epa, aqi, Denver-Boulder.
Current Air Quality
As of March 12, 2026, the Denver-Boulder reporting area in Colorado is experiencing elevated pollutant levels. The primary pollutant of concern is PM10, which has reached an Air Quality Index (AQI) value of 102, categorized as "Unhealthy for Sensitive Groups." Other monitored pollutants remain in the "Good" range, with Ozone (O3) at 44 and Fine Particulate Matter (PM2.5) at 42.
What This Means
An AQI in the 101-150 range means that air quality is considered unhealthy for members of sensitive groups. While the general public is less likely to be affected at this level, individuals with specific health vulnerabilities may experience adverse effects from breathing the air.
Who Should Take Precautions
Groups at increased risk from PM10 exposure include people with heart or lung disease, older adults, and children. These individuals should be mindful of their activity levels while the AQI remains in this category.
What You Should Do
Members of sensitive groups are advised to reduce prolonged or heavy outdoor exertion. It is recommended to take more breaks and engage in less intense activities. Watch for symptoms such as coughing or shortness of breath as indicators to reduce activity levels.
Source
Data provided by EPA AirNow.
Original source: EPA Official Notice ↗
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Common questions about this EPA air-quality advisory.