Saturday's great air quality should continue for part of Sunday, but then we will see increasing PM2.5 levels again. The pollution could start to increase as early as 6AM, but it is likely that it will really only start to increase noticeably around noon. From there we should see a slow but steady increase in PM2.5 through the day, moving us into Unhealthy for Sensitive Groups at a minimum by midnight, and likely into Unhealthy by that time.
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