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Welcome to theAIR QUALITY CENTER

The gauge ("colored wheel") and the line graph show the most recent Washington Air Quality Advisory level. The WAQA level represents several hours of data.

In contrast, the numerical values represent air quality at a given moment once per hour. The gauge color may not match the one-hour data reading.

Mount Vernon

Update: May 27, 2015 | 8:03 pm

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AIR QUALITY

Dominant Pollutant

    See State Monitoring

    NOTE: Colored gauge lags behind real-time air quality conditions, which may be different depending on your location.