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Current
Air Quality

Current Air Quality

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Burn Restrictions

Burning Restrictions

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Current Air Quality Index
How does the AQI work?
Burn Bans

Air Quality Index (AQI)

The AQI is a national standardized method for reporting daily air quality. It tells you how clean or polluted your air is, and what associated health effects might be a concern for you. The AQI converts the measured concentration of the dominant air pollutant to an AQI value using a scale of 0 to 500. 

The Current Air Quality reported here is a calculation of 24-hour data updated each hourl, with more recent hours given greater weight in the calculation. Using this "weighted calculation" better reflects real-time, hourly air quality so that individuals can adjust their activity levels. At the end of each day, the 24-hour data (midnight to midnight, unweighted) is calculated and is the official AQI for the day. This official daily AQI is displayed in the chart below.

Printable AQI charts:

The AQI chart below for the Spokane area is updated monthly. 

AQI Value
Category/Color Code
Cautionary Health Statements as of 5/31/17 
days in each category 

2016
days in each category

2015
days in each category 
 
 2014
days in each category

2013 
days in each category

0-50
Good/Green
Air quality is considered satisfactory, and
air pollution poses little or no risk. 
109 273 258 284 241
51-100
Moderate/Yellow

Air quality is acceptable; however, for certain pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive
to air pollution.

40 93 90 80 121
101-150
Unhealthy for Sensitive Groups/Orange
Members of sensitive groups may experience health effects. The general public is not likely to be affected.  2 0 11 1 2
151-200
Unhealthy/Red
Everyone may begin to experience health effects; members of sensitive groups may experience more serious health effects.  0 0 5 1 1
201-300
Very Unhealthy
Health warnings of emergency conditions. The entire population is more likely to be affected.  0  0 0 0 0
301-500+
Hazardous
Health alert: 
everyone may experience more serious health effects.
 
0  0 0 0 0

 

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