Expect generally good air quality on Wednesday, January 14 and Thursday, January 15. However, note that some valley locations may experience elevated levels of fine particulate matter (PM2.5), on Thursday morning.
AIRNow is a government-backed program. Through AIRNow, EPA, NOAA, NPS, news media, tribal, state,
and local agencies work together to report conditions for ozone and particle pollution.
State, Local and Tribal Partners.