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Pollutant Concentrations

Readings on 03 Sep 2015

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 4(3) 50(50) 35(-) 40(17) 0.5(5) 35(77)
South 9(5) 50(50) 19(-) 51(22) 0.5(5) 33(75)
East 12(7) 43(43) 9(-) 48(20) 0.4(4) 32(74)
West 38(24) 51(51) 22(-) 41(18) 0.4(4) 35(77)
Central 7(5) 47(47) 22(-) 49(21) 0.5(5) 29(70)

1-hr PM2.5 (µg/m3)b Readings on 02 Sep 2015

View reading for:

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
North 48 49 24 26 25 36 35 34 30 16 27 41
South 42 36 17 34 34 37 30 20 20 18 30 31
East 40 33 39 27 31 28 31 26 26 31 28 38
West 31 31 39 38 34 31 29 29 34 34 32 37
Central 40 33 23 25 29 20 25 22 26 16 22 31
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
North 34 45 58 46 51 48 36 29 23 24 22 26
South 42 42 44 41 32 40 34 32 36 28 32 38
East 37 36 35 45 41 24 35 24 27 26 27 35
West 57 51 41 48 49 38 36 30 21 26 27 24
Central 34 44 38 34 33 27 23 25 30 23 30 31

Note:
a Sub-index for nitrogen dioxide is reported only when the 1-hour concentration exceeds 1130 µg/m3.
b There is no sub-index for 1-h PM2.5.

3-hr PSI Readings from 1am to 12am on 02 Sep 2015

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
3-hr PSI 84 81 77 73 71 72 72 70 69 66 67 70
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
3-hr PSI 77 83 86 86 85 83 79 74 71 68 68 69



The real-time data is automatically published as soon as it is generated by our air monitoring stations. The data is subject to verification and correction subsequently if necessary.

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