Grand Rapids
 
Data and Forecasts courtesy of:
 

AQI Forecast - https://files.airnowtech.org/airnow/today/forecast_aqi_20170628_mi_in_oh.jpg Map Map Map Map Map Map Map Map Map Map Map Map Map
 
Legend: National Parks/Monuments National Parks/Monuments     Legend: Tribal Boundaries Tribal Boundaries
The tribal boundaries shown here are provided by the Bureau of Indian Affairs and are intended to be used as a general spatial reference only. They are not a formal determination of tribal boundaries by the EPA.
 - https://files.airnowtech.org/airnow/today/cur_aqi_mi_in_oh.jpg Map Map Map Map Map Map Map Map Map Map Map Map Map
 
Legend: National Parks/Monuments National Parks/Monuments     Legend: Tribal Boundaries Tribal Boundaries
The tribal boundaries shown here are provided by the Bureau of Indian Affairs and are intended to be used as a general spatial reference only. They are not a formal determination of tribal boundaries by the EPA.
AQI Animation - https://files.airnowtech.org/airnow/today/anim_aqi_mi_in_oh.gif Map Map Map Map Map Map Map Map Map Map Map Map Map
 
Legend: National Parks/Monuments National Parks/Monuments     Legend: Tribal Boundaries Tribal Boundaries
The tribal boundaries shown here are provided by the Bureau of Indian Affairs and are intended to be used as a general spatial reference only. They are not a formal determination of tribal boundaries by the EPA.
 
AQI: Good (0 - 50) AQI: Good (0 - 50)
Air quality is considered satisfactory, and air pollution poses little or no risk.
AQI: Moderate (51 - 100) AQI: Moderate (51 - 100)
Air quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.
AQI: Unhealthy for Sensitive Groups (101 - 150) AQI: Unhealthy for Sensitive Groups (101 - 150)
Although general public is not likely to be affected at this AQI range, people with lung disease, older adults and children are at a greater risk from exposure to ozone, whereas persons with heart and lung disease, older adults and children are at greater risk from the presence of particles in the air.
AQI: Unhealthy (151 - 200) AQI: Unhealthy (151 - 200)
Everyone may begin to experience health effects members of sensitive groups may experience more serious health effects.
 AQI:Very Unhealthy (201 - 300) AQI: Very Unhealthy (201 - 300)
Health alert: everyone may experience more serious health effects.
AQI: Hazardous(301 - 500) AQI: Hazardous (301 - 500)
Health warnings of emergency conditions. The entire population is more likely to be affected.
Action DayAction Day
 
Local Air Quality Resources
Action Day Programs | Forecast | Real-time Air Quality Data | Today's AQI
 
State Air Quality Resources
Air Monitoring via MIair – AQI, Pollutant Maps & Data
Air Quality Division - Michigan DEQ
American Lung Association (ALA) of Michigan
Department Environmental Quality (DEQ)
Department of Environmental Quality (DEQ) Environmental Emergency Contacts
Local Clean Air Coalitions: Clean Air Coalition of Southeast Michigan
Local Clean Air Coalitions: West Michigan Clean Air Coalition
Midwest Haze Camera
 
Data and Forecasts courtesy of:
Air Quality Forecast
Today Tomorrow
Air Quality Index (AQI)
Good Good
Health Message: None
Air Quality Index (AQI)
Moderate Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors.
AQI - Pollutant Details
Ozone
Good
Good
Particles (PM2.5)
Good
Good
Ozone
Moderate
Moderate
Particles (PM2.5)
Good
Good
Forecast Discussion: FORECAST SUMMARY: Wednesday, June 28th, 2017 through Friday, June 30th, 2017 Ozone: Ozone concentrations will range between Good and Moderate. PM-2.5: 24-hour Fine Particulate concentrations will generally be upper Good to low Moderate; but levels in the southwest may be Moderate with hourly USG readings. FORECAST DISCUSSION: An unsettled weather pattern can be expected the next few days. A warm front lifting through Wednesday will bring showers and storm chances with the heaviest precipitation in the northern portions of the state. Warmer air is moving in on a southerly wind. Clouds and precipitation won’t enter the south/eastern areas until later in the day. Ozone in those areas may increase into the Moderate range; the rest of the state should remain Good. Showers and storms remain in the forecast Thursday as a cold front positions itself near the Michigan/Indiana/Ohio borders. There looks to be a dry period during the day Thursday and conditions will be good for a quick increase in ozone levels in the west generally along the lakeshore. Moderate ozone may be seen again Thursday across parts of the state. With this forecast update we want to highlight expected fine particulate readings the next few days over the southwestern portion of the state. Fine particulate levels in that part of the state will likely be Moderate with hourly concentrations in the USG range a good possibility. This is due to a fire burning in southwest St. Joseph County. The threat for increased fine particulate concentration will primarily be in the counties of Cass and St. Joseph; however, with a south wind the next few days higher levels could be experienced further north into Van Buren and Kalamazoo counties. Across the rest of the state, fine particulate will be generally Good Wednesday with some Moderates Thursday. Showers and storms are in the forecast again Friday as a low pressure area tracks northeast along the stalled boundary. Increased clouds and storm chances should keep ozone mostly Good; however, with a boundary nearby, Moderate fine particulate is possible across the south. EXTENDED FORECAST: Extended forecast maps are not showing weather conditions that look conducive for high pollution levels; however, we will be having another regional forecast call Friday to go discuss expected ozone and fine particulate levels through the coming July 4th holiday. Forecast updated by Stephanie Hengesbach: Wednesday, June 28th, 2017 Next forecast update: Friday, June 30th, 2017

Current Conditions
Air Quality Index (AQI)
observed at 21:00 EDT
45
Good
Health Message: None
Note: Values above 500 are considered Beyond the AQI. Follow recommendations for the Hazardous category. Additional information on reducing exposure to extremely high levels of particle pollution is available here.
AQI - Pollutant Details
Ozone 45 Good
Particles (PM2.5) 38 Good

Past Air Quality Maps and Data
Yesterday's Maps and Data
Air Quality Maps Archives (by region)

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