10µm

2.5
µm

Relative Sizes

Period	Particle	Conc.	Index	UK Classification
now	µm10	0 µg/m3	0	Low
now	µm2.5	0 µg/m3	0	Low
now	µm1	0 µg/m3	0	Low
Last hour avg	µm10	1.42 µg/m3	1	Low
Last hour avg	µm2.5	0.79 µg/m3	1	Low
Last 3h avg	µm10	2.87 µg/m3	1	Low
Last 3h avg	µm2.5	2.02 µg/m3	1	Low
"Nowcast"	µm10	3.29 µg/m3	1	Low
"Nowcast"	µm2.5	2.45 µg/m3	1	Low
Last 24h avg	µm10	5.09 µg/m3	1	Low
Last 24h avg	µm2.5	4.09 µg/m3	1	Low	> 1 <	2	3	4	5	6	7	8	9	10

UK Classification	Index	µm10	µm2.5	The health effects should be based on 24 hours average values only.
Low	1	< 16 µg/m3	< 11 µg/m3	Enjoy your usual outdoor activities
	2	< 33 µg/m3	< 23 µg/m3
	3	< 50 µg/m3	< 35 µg/m3
Moderate	4	< 58 µg/m3	< 41 µg/m3	Enjoy your usual outdoor activities Adults and children with lung or heart problems, who experience symptoms, should consider reducing strenuous physical activity, particularly outdoors
	5	< 66 µg/m3	< 47 µg/m3
	6	< 75 µg/m3	< 53 µg/m3
High	7	< 83 µg/m3	< 58 µg/m3	Anyone experiencing discomfort such as sore eyes, cough or sore throat should consider reducing physical 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	< 91 µg/m3	< 64 µg/m3
	9	< 100 µg/m3	< 70 µg/m3
Very High	10	> 100 µg/m3	> 70 µg/m3	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.
Visit UK Air Quality site where you can find a wealth of information

Highly Modified Wim DKuil (Leuven) Script by beteljuice for use with Davis AirLink sensors.