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Air Quality Data - Unedited Hourly Concentrations

Special status notes:

IMPORTANT NOTES: 1) During late winter/early spring, moderate levels of coarse particles can occur on windy days or during high traffic times near roadways that have dried out after being heavily sanded. 2) Ozone levels can easily be near the top of the Good range in Maine during March.


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."

A map of yesterday's maximum AQI for Ozone in Maine is also available.

Specify the data you would like to view: