Health

Air Quality Index

Caledonia, MI 49316

Air Quality

Today's Air Quality - Grand Rapids, MI
Date	Code	AQI Level	Major Pollutant
2/20/2012 10:00 PM		25	Small Particulate Matter
Air Quality Forecast - Grand Rapids, MI
Date	Code	AQI Level	Major Pollutant
2/23/2012		N/A	Small Particulate Matter

Air Quality Index (AQI) Scale
AQI Color	AQI Category	AQI Numbers
	Good	0-50
	Moderate	51-100
	Unhealthy for Sensitive Groups	101-150
	Unhealthy	151-200
	Very Unhealthy	201-300
	Hazardous	301-500+

High Temps

Find out the high temps for your area.
View Temp Map

Hourly Forecast for Caledonia, MI 49316

Time	Conditions	Sky Cover	Chance of Precip.	Heat Index Wind Chill	Wind
Monday, February 20, 2012
11 pm	32° F	62%	35%	24° F	From SE 10 mph
Tuesday, February 21, 2012
12 am	32° F	65%	35%	23° F	From SE 11 mph
View Next 12 Hours

Weather News

Other Top Weather Headlines

Strong Storms Target Southern Plains

Residents from Wichita, Kan., to Oklahoma City could be dodging severe thunderstorms capable of producing hail, damaging…More >
Snow, Wind Sweeping Northern/Central Plains

The ongoing snow drought across the Central and Northern Plains will get chipped away as a storm motoring through the…More >
Storm Dumps Snow on South, Heads Out to Sea

A winter storm dumped several inches of snow on parts of the South where several cars were involved in crashes along…More >

Watch Videocast >

More Weather News >

WeatherBug Featured Content

View live traffic camera images from cities around the U.S.

It's cold and flu season. Get facts, symptoms and view the latest outbreaks.

Get local severe weather alerts right on your mobile phone.

Are you Elite? Mobile weather has never looked so good.

WeatherBug’s Traffic Section will prepare you for your daily commute with live traffic camera images from cities around the U.S. Choose between different intersections to view traffic and road conditions around your location. More >

Traffic Cameras

What is AQI?

The AQI is an index for reporting daily air quality. It tells you how clean or polluted your air is, and what associated health concerns you should be aware of. The AQI focuses on health effects that can happen within a few hours or days after breathing polluted air. EPA uses the AQI for five major air pollutants regulated by the Clean Air Act: ground-level ozone, particulate matter, carbon monoxide, sulfur dioxide, and nitrogen dioxide. For each of these pollutants, EPA has established national air quality standards to protect against harmful health. (EPA-454K-03-002, August 2003, http://www.airnow.gov/)