Air Quality Forecast
Current 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. Forecasts are also available on the Bureau's Air Quality Hotline at (800) 223-1196.
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Special status notes:
IMPORTANT WINTER NOTES: ***1) Particle pollution (fine particle) levels often rise during the overnight hours. This occurs mostly on calm, clear, cold nights when inversions form and behave like a cap keeping pollution from lifting high above the surface. You can see the inversion layer because smoke from heating devices will hover like a blanket. Higher terrain will trap pollution in valleys and 'bowls'. If the air doesn't mix well during the day, or many heating devices are concentrated in a valley area, the 24 hour average of particle pollution can reach the Moderate range for the day. ***2) 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.
Today's Forecast: Feb 21, 2020
Forecast Details: Updated Thursday February 20 at 1:08 PM. Friday's Air Quality Forecast for Ozone is GOOD statewide while Particle Pollution is MODERATE for most of the state and GOOD for the Mid-Coast and Downeast Coastal regions. -- Webster
Tomorrow's Forecast: Feb 22, 2020
Forecast Details: Updated Friday February 21 at 1:56 PM. Saturday's Air Quality Forecast for Ozone and Particle Pollution is GOOD statewide. [Winds are forecast to remain breezy overnight so I think that only a few hours could rise a bit and the 24 hr average will be in the good range.] -- Webster
Forecast regions are used to refer to general geographic areas of the state and air pollution obviously is not contained by these boundaries. If a region adjacent to the region containing your particular town is forecasted to have poorer air quality than your region, you might consider noting the health effects associated with the poorer air quality and take appropriate actions.
|Air Quality Descriptor||Color Code||Health Effects|
|Good||GREEN||No Health Notice. No health impacts expected in this range. It’s a great day to be active outside!|
|Moderate||YELLOW||Limited Health Notice. Sensitive people should consider reducing prolonged or heavy exertion. Watch for symptoms such as coughing or shortness of breath. These are signs to take it easy.|
|Unhealthy for Sensitive Groups||ORANGE||Health Notice. People with heart or lung disease, the elderly, teenagers and children should reduce prolonged or heavy exertion. It is okay to be active outside, but take more breaks and do less intense activities. Watch for symptoms such as coughing or shortness of breath. Asthmatics should follow their action plans and keep quick relief meds handy. Those with heart disease should watch for palpitations, shortness of breath or unusual fatigue and contact your health provider of necessary.|
|Unhealthy||RED||Health Advisory. People with heart or lung disease, the elderly, teenagers and children should avoid prolonged or heavy exertion and consider moving activities indoors or rescheduling. Everyone else should reduce prolonged or heavy exertion. Take more breaks during all outdoor activities.|
|Very Unhealthy||PURPLE||Health Alert. People with respiratory or heart disease, the elderly, teenagers and children should avoid any outdoor activity. Move activities indoors or reschedule to a time when air quality is better. Everyone else should avoid prolonged or heavy exertion. Consider moving activities indoors or rescheduling to a time when air quality is better.|
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