Understanding Air Quality Alerts and Index Codes in the US and Canada.
TL;DR Summary
The U.S. Air Quality Index measures five major pollutants and ranges from 0 to 500, with higher values indicating worse air quality. Code Green represents good air quality, while Code Purple means the air is hazardous and serves as a "health warning of emergency conditions." The Environmental Protection Agency recommends reducing exposure to pollution, especially for those at increased health risk, such as people with asthma.
- Explaining the Air Quality Index: What Code Red, Code Orange mean The Washington Post
- Millions in US under air quality alerts as Canada wildfires rage CNN
- Air quality alerts: Symptoms and signs of health complications to know NBC News
- Map: See the air quality index in Massachusetts and New England The Boston Globe
- Air quality alerts have been issued across CT. What do they mean? CT Insider
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