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Pollutant Concentrations

Air quality readings will be available hourly from 1am to 12am..

 

Readings on 04 Nov 2014

View reading for:

Region 24-hr Sulphur dioxide
(µg/m3) 		24-hr PM10
(µg/m3) 		1-hr Nitrogen dioxide
(µg/m3)a 		8-hr Ozone
(µg/m3) 		8-hr Carbon monoxide
(mg/m3) 		24-hr PM2.5
(µg/m3)
North 13(8) 51(51) 14(-) 60(25) 0.2(2) 30(71)
South 9(5) 47(47) 36(-) 54(23) 0.4(4) 36(78)
East 7(4) 40(40) 25(-) 61(26) 0.4(4) 33(74)
West 14(9) 55(53) 47(-) 52(22) 0.3(3) 38(80)
Central 14(9) 44(44) 44(-) 77(33) 0.6(6) 31(73)

1-hr PM2.5 (µg/m3)b Readings on 04 Nov 2014

View reading for:

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
North 45 38 35 34 37 38 37 41 32 30 36 33
South 52 57 58 52 53 46 29 33 33 44 44 41
East 48 52 46 42 31 31 31 34 31 30 30 25
West 52 55 52 44 45 45 46 63 52 57 41 31
Central 50 50 47 41 39 42 35 34 33 24 18 19
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
North 28 23 25 23 20 22 21 24 21 21 23 -
South 38 33 31 33 31 19 18 16 14 21 21 -
East 27 22 24 28 30 24 36 30 32 28 29 -
West 29 31 30 28 22 29 22 25 24 28 26 -
Central 23 17 26 22 29 31 33 26 27 22 27 -

Note:
a Sub-index for nitrogen dioxide is reported only when the 1-hr concentration equals or exceeds 1130 µg/m3.

b There is no sub-index for 1-hr PM2.5.

3-hr PSI Readings from 1am to 12am on 04 Nov 2014

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
3-hr PSI 83 90 93 90 87 84 82 81 80 80 77 75
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
3-hr PSI 72 69 68 67 68 67 66 66 65 64 65 -

Hourly updates of 3-hr PSI readings are provided from 1am to 12am. The 3-hr PSI readings are calculated based on PM2.5 concentrations only.

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