Air Quality Index for Health

The Environmental Protection Agency's Air Quality Index for Health (AQIH) is a number from 1 to 10 that tells you what the air quality currently is in the station nearest you and whether or not this might affect the health of you or your child. A reading of 10 means the air quality is very poor and a reading of one to three inclusive means that the air quality is good.

The Air Quality Index for Health is derived as follows:
Band Index Ozone (µg/m³)
8 HOUR MEAN
Nitrogen Dioxide (µg/m³)
1 HOUR MEAN
Sulphur Dioxide (µg/m³)
1 HOUR MEAN
PM2.5 (µg/m³)
24 HOUR MEAN
PM10 (µg/m³)
24 HOUR MEAN
Low 1 0 - 33 0 - 67 0 - 29 0 - 11 0 - 16
2 34 - 66 68 - 134 30 - 59 12 - 23 17 - 33
3 67 - 100 135 - 200 60 - 89 24 - 35 34 - 50
Moderate 4 101 - 120 201 - 267 90 - 119 36 - 41 51 - 58
5 121 - 140 268 - 334 120 - 149 42 - 47 59 - 66
6 141 - 160 335 - 400 150 - 179 48 - 53 67 - 75
High 7 161 - 187 401 - 467 180 - 236 54 - 58 76 - 83
8 188 - 213 468 - 534 237 - 295 59 - 64 84 - 91
9 214 - 240 535 - 600 296 - 354 65 - 70 92 - 100
Very High 10 241 or more 601 or more 355 or more 71 or more 101 or more

Health Advice

The health advice associated with the Air Quality Index For Health is as follows:
Band Index Health Advice for General Population Health Advice for At-Risk Groups
Low 1 Enjoy your usual outdoor activities. Enjoy your usual outdoor activities.
2
3
Moderate 4 Enjoy your usual outdoor activities. Adults and children with lung problems, and adults with heart problems, who experience symptoms, should consider reducing strenuous physical activity, particularly outdoors.
5
6
High 7 Anyone experiencing discomfort such as sore eyes, cough or sore throat should consider reducing activity, particularly outdoors.

Adults and children with lung problems, and adults with heart problems, should reduce strenuous physical activity, particularly outdoors, and particularly if they experience symptoms.

People with asthma may find they need to use their reliever inhaler more often. Older people should also reduce physical exertion.

8
9
Very High 10 Reduce physical exertion, particularly outdoors, especially if you experience symptoms such as cough or sore throat.

Adults and children with lung problems, adults with heart problems, and older people, should avoid strenuous physical activity.

People with asthma may find they need to use their reliever inhaler more often.