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Air Quality Forecast

The Department of Environmental Protection's Bureau of Air Quality established this site to inform the general public of current air quality concentrations and expected air quality concentrations for the upcoming 24 hours. Air quality forecasts are scheduled to be updated by 3:00 pm weekdays and other times as necessary. Air Quality forecasts are also available on the Bureau's Air Quality Hotline at (800) 223-1196.

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Special status notes:

Ozone season has begun. Consider signing up for EnviroFlash to receive an email (or a text message on your cell phone) letting you know when air quality is expected to be poor the next day.

Today's Forecast: May 7, 2009

Region Ozone Particle
Northern Good Good
Western Mtns Good Good
Western Interior Good Good
Eastern Interior Good Good
Southwest Coast Good Good
Mid-Coast Good Good
Downeast Good Good
High Elevation Good Good
View Legend

Ozone

Map displaying today's Ozone forecast conditions

Particle Pollution

Map displaying today's Particle Pollution forecast conditions

Forecast Details: Updated Wednesday, May 6 at 12:10 PM: Thursday's Air Quality Forecast for Ozone and Particle Pollution is GOOD statewide. -- WEBSTER

View today's current data

Tomorrow's Forecast: May 8, 2009

Region Ozone Particle
Northern Good Good
Western Mtns Good Good
Western Interior Good Good
Eastern Interior Good Good
Southwest Coast Good Good
Mid-Coast Good Good
Downeast Good Good
High Elevation Good Good
View Legend

Ozone

Map displaying tomorrow's Ozone forecast conditions

Particle Pollution

Map displaying tomorrow's Particle Pollution forecast conditions

Forecast Details: Issued Wednesday, May 6 at 12:10 PM: Friday's Air Quality Forecast for Ozone and Particle Pollution is GOOD statewide. [Temperatures warm up quite nicely in some areas and winds will be southwesterly most of the day but expect mostly cloudy to overcast skies and an increasing chance of rain during the afternoon so ozone levels will likely remain low. We'll keep an eye on particle pollution levels across the region on Wed & Thurs.] THIS FORECAST WILL BE UPDATED BY 3 PM THURSDAY. -- WEBSTER

Forecast Legend
Air Quality Descriptor Air Quality Index Health Effects
Good 0-50 No Health Notice
Moderate 51-100 Limited Health Notice
Unhealthy for Sensitive Groups 101-150 Health Notice
Unhealthy 151-200 Health Advisory
Very Unhealthy 201-300 Health Alert

View more information about Air Quality Index and Health Effects.

Questions about forecasts or air quality data?
Contact Us, (207) 287-2437