Air quality alerts use color-coded categories to show when pollution levels may be unhealthy. Code Orange is unhealthy for sensitive groups, while Code Red is unhealthy for everyone. Code Purple means ...
The Pennsylvania Department of Environmental Protection has declared a Code Purple Air Quality Alert across the commonwealth for Friday, July 17. Code Purple indicates "very unhealthy" conditions with ...
When an air quality alert is announced, here are what the code colors mean and what the health dangers are as Canadian wildfire reaches Delaware.
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