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Pollutant Concentrations

Readings on 09 Feb 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 6(4) 30(30) 20(-) 34(15) 0.7(7) 16(55)
South 5(3) 36(36) 16(-) 39(16) 0.5(5) 16(55)
East 5(3) 27(27) 5(-) 54(23) 0.7(7) 18(58)
West 3(2) 32(32) 11(-) 39(17) 0.4(4) 16(55)
Central 8(5) 32(32) 29(-) 62(26) 0.5(5) 15(54)

1-hr PM2.5 (µg/m3)b Readings on 08 Feb 2015

View reading for:

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
North 23 22 18 11 17 20 16 21 20 12 12 15
South 11 14 26 13 18 9 14 13 23 20 17 29
East 15 15 18 17 22 24 20 22 27 30 24 15
West 17 11 19 18 14 21 19 16 14 21 23 19
Central 12 9 17 14 14 14 14 17 17 15 14 14
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
North 13 15 8 11 10 14 10 6 18 27 15 17
South 13 21 23 12 13 10 12 9 8 11 20 14
East 12 16 9 18 12 11 17 19 14 18 20 16
West 18 22 16 15 14 12 14 12 5 13 14 9
Central 15 14 17 8 13 9 16 19 20 17 18 17

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 08 Feb 2015

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
3-hr PSI 51 52 56 56 57 56 57 57 58 59 59 59
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
3-hr PSI 56 56 55 54 52 51 51 52 52 53 55 56



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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