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2. Woodburn, OR Weather - Hourly Forecasts and Local ... - AOL

   www.aol.com/weather/forecast/us/woodburn-12798454

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3. NowCast (air quality index) - Wikipedia

   en.wikipedia.org/wiki/NowCast_(air_quality_index)

   PM 2.5 AQI of US monitors, calculated utilizing NowCast, courtesy US EPA PM2.5 AQI map, calculated utilizing NowCast, courtesy US EPA. The PM (particulate matter) NowCast is a weighted average of hourly air monitoring data used by the United States Environmental Protection Agency (USEPA) for real-time reporting of the Air Quality Index (AQI) for PM (PM 10 - particles less than 10 micrometers ...

4. How to understand the Air Quality Index - AOL

   www.aol.com/news/how-to-understand-the-air...

   Metro areas with a population of more than 350,000 have to report air quality data on a daily basis, while other locales simply do so as a public service. The AQI measures air quality based on ...

5. Air quality index - Wikipedia

   en.wikipedia.org/wiki/Air_quality_index

   The Common Air Quality Index (CAQI) [21] is an air quality index used in Europe since 2006. [22] In November 2017, the European Environment Agency announced the European Air Quality Index (EAQI) and started encouraging its use on websites and for other ways of informing the public about air quality. [23]

6. Air quality guideline - Wikipedia

   en.wikipedia.org/wiki/Air_quality_guideline

   Air quality guideline. 1 language. ... For nitrogen dioxide (NO 2), the guidelines set 10 μg/m 3 for the annual mean or 25 μg/m 3 for a 24-hours mean. [2]

7. Weird winter weather: Cold and snow to the East, but rain and ...

   www.aol.com/weird-winter-weather-cold-snow...

   Weather forecast for Saturday, Dec. 21, 2024, into Sunday, Dec. 22, 2024.