TOAR Health (IMAGE)

University of Colorado at Boulder

TOAR Health

Caption

Average number of days per year (2010-2014 average) when ozone levels exceed the US health-based air quality standard of 70 parts per billion (ppb) averaged over eight hours, at non-urban and urban sites. People in parts of California, Arizona, Colorado, Texas, the Midwest and the Middle Atlantic experienced more than 15 days a year with ozone pollution readings higher than 70 ppb.

Credit

TOAR/Elementa

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