Air Quality Data - Unedited Hourly Concentrations

Special status notes:

IMPORTANT WINTER WEATHER NOTES: 1) Particle pollution forecasts are for the smaller particles. Particle pollution levels tend to climb on cold, calm, clear nights due to nighttime inversions which act like a cap trapping pollution close to the surface. In river valleys and areas with more emissions, especially from wood smoke, levels can reach the moderate range. 2) Coarse particle pollution is also a concern during the winter months. Sand and salt mixtures dry out after a storm. Winds and traffic can stir up coarse particle pollution on roadways and parking lots.


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: