Data source: National Weather Service (NWS) Last verified: July 19, 2026

Air Quality

Air Quality Alert (ADVISORY) - expires July 19, 2026 at 12:00 AM EDT

Areas affected: Northern Oxford; Northern Franklin; Central Somerset; Southern Oxford; Southern Franklin; Southern Somerset; Interior York; Central Interior Cumberland; Androscoggin; Kennebec; Interior Waldo; Coastal York; Coastal Cumberland; Sagadahoc; Lincoln; Knox; Coastal Waldo; Interior Cumberland Highlands

Air Quality Alert issued July 18 at 3:11AM EDT by NWS Gray ME

The Maine Department of Environmental Protection's Bureau of Air Quality has issued an Air Quality Alert for particle pollution from 10 AM this morning to midnight EDT tonight.

Particle pollution levels are expected to rise into the Unhealthy for Sensitive Groups range during the day today. Smoke from wildfires in western Ontario and Manitoba is expected to move back into Maine during the day.

The Maine Department of Environmental Protection recommends that individuals consider limiting strenuous outdoor physical activity to reduce the risk of adverse health effects. People who may be especially sensitive to the effects of elevated levels of pollutants include the very young, the elderly, those with pre-existing respiratory problems such as asthma, those with heart disease and anyone who is working hard outdoors. It is okay to be active outdoors. But if you experience symptoms such as shortness of breath, coughing, throat irritation or an uncomfortable sensation in your chest please consider limiting the intensity and duration of your outdoor activities.

A toll free air quality hotline has been established so Maine residents can stay informed on the air quality situations. The toll free number is: 1-800-223-1196.

Additionally the Maine Department of Environmental Protection has the air quality forecast available on the web at www.maine.gov/dep/air/aqforecast.

Source: NWS Gray ME

Air Quality Alert (ADVISORY) - expires July 19, 2026 at 12:00 AM EDT

Areas affected: Northwest Aroostook; Northeast Aroostook; Northern Somerset; Northern Piscataquis; Northern Penobscot; Southeast Aroostook; Central Piscataquis; Central Penobscot; Southern Penobscot; Interior Hancock; Central Washington; Coastal Hancock; Coastal Washington; Southern Piscataquis; Northern Washington

Air Quality Alert issued July 18 at 2:46AM EDT by NWS Caribou ME

The Maine Department of Environmental Protection's Bureau of Air Quality has issued an Air Quality Alert for particle pollution from 10 AM this morning to midnight EDT tonight.

Particle pollution levels are expected to rise into the Unhealthy for Sensitive Groups range during the day today. Smoke from wildfires in western Ontario and Manitoba is expected to move back into Maine during the day today. Moderate levels of ozone are also expected for the Mid-Coast including the high elevations of Acadia National Park.

The Maine Department of Environmental Protection recommends that individuals consider limiting strenuous outdoor physical activity to reduce the risk of adverse health effects. People who may be especially sensitive to the effects of elevated levels of pollutants include the very young, older adults, those who work outdoors, those with pre-existing respiratory problems such as asthma, and those with heart disease. It is okay to be active outdoors. But if you experience symptoms such as shortness of breath, coughing, throat irritation or an uncomfortable sensation in your chest, please consider limiting the intensity and duration of your outdoor activities.

A toll free air quality hotline has been established so Maine residents can stay informed on the air quality situations. The toll free number is: 1-800-223-1196.

Additionally the Maine Department of Environmental Protection has the air quality forecast available on the web at www.maine.gov/dep/air/aqforecast.

Source: NWS Caribou ME

Air Quality Alert (ADVISORY) - expires July 19, 2026 at 12:00 AM EDT

Areas affected: Northwest Aroostook; Northeast Aroostook; Northern Somerset; Northern Piscataquis; Northern Penobscot; Southeast Aroostook; Central Piscataquis; Central Penobscot; Southern Penobscot; Interior Hancock; Central Washington; Coastal Hancock; Coastal Washington; Southern Piscataquis; Northern Washington

Air Quality Alert issued July 17 at 3:41PM EDT by NWS Caribou ME

The Maine Department of Environmental Protection's Bureau of Air Quality has issued an Air Quality Alert for particle pollution from 10 AM Saturday to midnight EDT Saturday night.

Particle pollution levels are expected to rise into the Unhealthy for Sensitive Groups range during the day on Saturday. Smoke from wildfires in western Ontario and Manitoba is expected to move back into Maine during the day on Saturday. Moderate levels of ozone are also expected for the Mid-Coast including the high elevations of Acadia National Park.

The Maine Department of Environmental Protection recommends that individuals consider limiting strenuous outdoor physical activity to reduce the risk of adverse health effects. People who may be especially sensitive to the effects of elevated levels of pollutants include the very young, older adults, those who work outdoors, those with pre-existing respiratory problems such as asthma, and those with heart disease. It is okay to be active outdoors. But if you experience symptoms such as shortness of breath, coughing, throat irritation or an uncomfortable sensation in your chest, please consider limiting the intensity and duration of your outdoor activities.

A toll free air quality hotline has been established so Maine residents can stay informed on the air quality situations. The toll free number is: 1-800-223-1196.

Additionally the Maine Department of Environmental Protection has the air quality forecast available on the web at www.maine.gov/dep/air/aqforecast.

Source: NWS Caribou ME

Air Quality Alert (ADVISORY) - expires July 19, 2026 at 12:00 AM EDT

Areas affected: Northern Oxford; Northern Franklin; Central Somerset; Southern Oxford; Southern Franklin; Southern Somerset; Interior York; Central Interior Cumberland; Androscoggin; Kennebec; Interior Waldo; Coastal York; Coastal Cumberland; Sagadahoc; Lincoln; Knox; Coastal Waldo; Interior Cumberland Highlands

Air Quality Alert issued July 17 at 3:35PM EDT by NWS Gray ME

The Maine Department of Environmental Protection's Bureau of Air Quality has issued an Air Quality Alert for particle pollution from 10 AM Saturday to midnight EDT Saturday night.

Particle pollution levels are expected to rise into the Unhealthy for Sensitive Groups range during the day on Saturday. Smoke from wildfires in western Ontario and Manitoba is expected to move back into Maine during the day on Saturday.

The Maine Department of Environmental Protection recommends that individuals consider limiting strenuous outdoor physical activity to reduce the risk of adverse health effects. People who may be especially sensitive to the effects of elevated levels of pollutants include the very young, the elderly, those with pre-existing respiratory problems such as asthma, those with heart disease and anyone who is working hard outdoors. It is okay to be active outdoors. But if you experience symptoms such as shortness of breath, coughing, throat irritation or an uncomfortable sensation in your chest please consider limiting the intensity and duration of your outdoor activities.

A toll free air quality hotline has been established so Maine residents can stay informed on the air quality situations. The toll free number is: 1-800-223-1196.

Additionally the Maine Department of Environmental Protection has the air quality forecast available on the web at www.maine.gov/dep/air/aqforecast.

Source: NWS Gray ME

Source

Alert data provided by the National Weather Service (NWS). This page shows active alerts only and is refreshed daily. For real-time updates, visit weather.gov.