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What is Code Purple air quality? What do Code Orange, Red and Purple mean?
Air quality alerts can change quickly during wildfire smoke events. Here’s what Code Orange, Code Red, Code Purple and Code ...
The Pennsylvania Department of Environmental Protection (DEP) declared on Wednesday a statewide Code Red Air Quality Action ...
What are "Code Red" and "Code Purple" air quality alerts? The Air Quality Index has six color-coded categories, ranging from ...
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