Air Quality Index for Health

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

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.