In 2022, there were 597 unhealthy days for ozone and fine particle pollution in the United States. The number of unhealthy air days in the U.S. has shown long-term improvement over the past two decades. In the early 2000s, the number of days reaching unhealthy for sensitive groups or above the AQI was typically more than 1,500.
Number of unhealthy air quality days in the United States from 2000 to 2022
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Environmental Protection Agency. (May 23, 2023). Number of unhealthy air quality days in the United States from 2000 to 2022 [Graph]. In Statista. Retrieved June 10, 2024, from https://internal.statista.com/statistics/889466/unhealthy-air-pollution-days-us/
Environmental Protection Agency. "Number of unhealthy air quality days in the United States from 2000 to 2022." Chart. May 23, 2023. Statista. Accessed June 10, 2024. https://internal.statista.com/statistics/889466/unhealthy-air-pollution-days-us/
Environmental Protection Agency. (2023). Number of unhealthy air quality days in the United States from 2000 to 2022. Statista. Statista Inc.. Accessed: June 10, 2024. https://internal.statista.com/statistics/889466/unhealthy-air-pollution-days-us/
Environmental Protection Agency. "Number of Unhealthy Air Quality Days in The United States from 2000 to 2022." Statista, Statista Inc., 23 May 2023, https://internal.statista.com/statistics/889466/unhealthy-air-pollution-days-us/
Environmental Protection Agency, Number of unhealthy air quality days in the United States from 2000 to 2022 Statista, https://internal.statista.com/statistics/889466/unhealthy-air-pollution-days-us/ (last visited June 10, 2024)
Number of unhealthy air quality days in the United States from 2000 to 2022 [Graph], Environmental Protection Agency, May 23, 2023. [Online]. Available: https://internal.statista.com/statistics/889466/unhealthy-air-pollution-days-us/