Grand Rapids
 
Data courtesy of:
 

AQI Forecast - http://files.airnowtech.org/airnow/today/forecast_aqi_20150729_mi_in_oh.jpg
 
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.
 - http://files.airnowtech.org/airnow/today/cur_aqi_mi_in_oh.jpg
 
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 - http://files.airnowtech.org/airnow/today/anim_aqi_mi_in_oh.gif
 
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: Moderate (51 - 100) AQI: Unhealthy for Sensitive Groups (101 - 150) AQI: Unhealthy (151 - 200) AQI: Very Unhealthy (201 - 300) AQI: Hazardous(301 - 500) 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
EPA Region 5 Air Quality
Local Clean Air Coalitions: Clean Air Coalition of Southeast Michigan
Local Clean Air Coalitions: West Michigan Clean Air Coalition
Midwest Haze Camera
Air Quality Forecast
Today's High Tomorrow's High
Air Quality Index (AQI)
Moderate Moderate
Health Message: Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors.
Air Quality Index (AQI)
Good Good
Health Message: None
AQI - Pollutant Details
Particles (PM2.5)
Moderate
Moderate
Ozone
Moderate
Moderate
Particles (PM2.5)
Good
Good
Ozone
Good
Good
Forecast Discussion: FORECAST SUMMARY: Monday, July 27th, 2015 through Thursday, July 30th, 2015 Ozone: 8-hour Ozone is expected to be mostly Moderate through Tuesday with Good to Moderate readings the rest of the period. PM-2.5: 24-hour Fine Particulate concentrations will range from upper Good to middle Moderate. FORECAST DISCUSSION: Summer-like weather continues through Tuesday before a cold front brings precipitation chances late Tuesday into Wednesday. Warm temperatures and plenty of sunshine will be on tap for Monday and Tuesday. Highs both days will approach, and possibly pass, the 90 degree mark across parts of the state. These conditions are typically conducive for high ozone levels but what will help keep readings under control the next two days will be the surface and upper level wind flow. Surface winds Monday will be vary from westerly/northwesterly along the West Michigan shoreline to more of an easterly/southeasterly flow over the rest of the state. The surface flow, coupled with upper level winds from the northwest, should keep ozone from reaching higher than Moderate. Southeasterly winds on Tuesday will turn more southerly later in the day, but upper level winds remain northwest through this period. There is a small chance a monitor or two right along the Lake Michigan shoreline could hit USG Monday or Tuesday but without a good southwest wind the next two days, the pollution that does develop over the lake will not be transported inland. Fine particulate levels the next few days will continue to range from upper Good to middle Moderate. A cold front is forecast to pass through the state late Tuesday into Wednesday bringing with it chances for showers and storms. Pollution should improve after the boundary passes. Ozone and fine particulate should be Good across west and central areas Wednesday; however, Moderate pollution levels may linger in the east due to the later passage of the cold front. Westerly winds will prevail Thursday with high pressure settling in. Pollution levels on Thursday should be mostly Good. EXTENDED FORECAST: High pressure dominates our weather for the end of the work week and temperatures will be again increasing into the 80s. We will be taking another look at the forecast maps and having a regional call Thursday to detail air quality conditions for the end of the week and coming weekend. Forecast updated by Stephanie Hengesbach: Monday, July 27th, 2015 Next forecast update: Thursday, July 30th, 2015

Current Conditions
Air Quality Index (AQI)
observed at 19:00 EDT
39
Good
Health Message: None
AQI - Pollutant Details
Ozone 39 Good
Particles (PM2.5) 15 Good

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