Guide to Air Quality Health Index forecasts: chapter 2

Air Quality elements and when they are included in the forecast

Maximum Air Quality Health Index (AQHI)
Included in the forecast for Day 1 and 2?
- Yes

Indicates the maximum AQHI numerical value and category

Day 1 and 2: The maximum AQHI value is the only element in the forecast and will represent the maximum AQHI value over each part period, today, tonight and Day 2.


  • 1-3: Low risk
  • 4-6: Moderate risk
  • 7-10: High risk
  • Above 10: Very high risk


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