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AirNow.gov

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Air Quality Index Scale

0 - 50
Good
51 - 100
Moderate
101 - 150
Unhealthy for Sensitive Groups (USG)
151 - 200
Unhealthy
201 - 300
Very Unhealthy
301 - 500
Hazardous

Values above 500 are beyond the AQI scale.

Current Air Quality

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Air Quality Forecast

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Announcements

https://www.airnow.gov/announcement/4636

Celebrate Air Quality Awareness Week

2023-04-20

It’s Air Quality Awareness Week! This year’s theme is “Working Together for Clean Air.” Learn about air quality and how EPA is working toward cleaner air for everyone across the nation by checking out this year’s daily topics, including Wildfires and Smoke and Asthma and Your Health. Celebrate #AQAW2023 with us on Twitter and Facebook.

https://www.airnow.gov/announcement/3336

Recursos de AirNow en español

2022-08-04

Ahora los recursos de AirNow en español son más fáciles de encontrar. Haga clic en los Recursos en español para encontrar los enlaces a nuestros documentos en español sobre el Índice de Calidad del Aire, cómo prepararse para los incendios forestales y más.