During the day of the 5th of July, the PM 2.5 for the North East to Mid-West region of the United States was in the moderate (yellow) to USG (Unhealthy for Sensitive Groups – orange) level. Southern California also had…

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Strong levels of Ozone & PM 2.5 in North East

Tags: air quality news, california, during-the-day, north, north-east, sensitive, southern-california, the-moderate, united, united-states, usg

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