Air Quality Data - Unedited Hourly Concentrations

Special status notes:

IMPORTANT EARLY SPRING NOTE: Coarse particles levels will rise near roadways and parking lots as the sand & salt is stirred up by winds or vehicle traffic. This is most likely in the days following a winter storm. Once the sand/salt mixture dries out it is stirred up more easily.


Use the form below to retreive hourly air quality concentrations recorded from a number of ozone and particle pollution monitoring stations across the State. This is "Raw" data which has not been converted to the Air Quality Index and is "preliminary."

Specify the data you would like to view: