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Pollutant Concentrations

Readings on 08 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) 26(-) 39(16) 0.7(7) 15(54)
South 4(3) 32(32) 15(-) 46(19) 0.4(4) 13(52)
East 6(4) 33(33) 16(-) 40(17) 0.4(4) 14(53)
West 3(2) 30(30) 11(-) 44(19) 0.4(4) 12(49)
Central 8(5) 28(28) 34(-) 70(30) 0.4(4) 11(45)

1-hr PM2.5 (µg/m3)b Readings on 07 Feb 2015

View reading for:

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
North 13 12 12 10 8 13 10 12 17 13 8 12
South 9 11 10 9 6 11 6 9 14 15 27 20
East 11 13 13 10 11 11 10 8 16 19 18 18
West 12 8 12 8 11 7 3 13 11 8 16 15
Central 7 7 9 9 5 12 6 11 15 8 7 16
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
North 10 11 8 12 15 36 37 20 22 10 10 18
South 17 12 13 14 24 28 17 16 7 6 5 5
East 10 13 11 19 19 23 21 18 11 9 9 17
West 15 12 21 12 11 15 14 8 13 15 18 6
Central 13 7 13 6 10 23 19 20 11 9 9 6

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 07 Feb 2015

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
3-hr PSI 43 41 44 43 40 39 36 40 45 52 53 54
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
3-hr PSI 54 53 51 51 53 57 61 61 56 52 46 43



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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