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Pollutant Concentrations

Readings on 10 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) 31(31) 40(-) 44(19) 0.3(3) 17(56)
South 7(4) 33(33) 19(-) 42(18) 0.5(5) 15(54)
East 6(3) 25(25) 9(-) 64(27) 0.5(5) 15(55)
West 3(2) 32(32) 7(-) 40(17) 0.5(5) 15(54)
Central 8(5) 30(30) 31(-) 67(29) 0.4(4) 13(52)

1-hr PM2.5 (µg/m3)b Readings on 09 Feb 2015

View reading for:

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
North 15 19 10 13 13 21 23 13 14 10 18 10
South 14 20 11 11 11 8 9 14 16 26 19 21
East 17 14 21 14 14 14 13 15 15 18 18 15
West 12 13 15 16 6 12 6 11 13 14 19 18
Central 17 15 16 10 6 10 9 19 15 11 15 12
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
North 15 13 17 14 25 22 17 21 17 21 22 16
South 18 23 26 20 17 12 13 4 5 7 9 11
East 18 20 15 17 20 14 9 15 9 14 15 14
West 21 17 12 19 16 16 17 20 15 14 15 27
Central 11 14 17 11 14 11 20 16 8 13 8 10

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 09 Feb 2015

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
3-hr PSI 55 55 55 54 51 50 48 52 53 54 56 56
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
3-hr PSI 56 56 57 57 57 56 56 54 53 52 52 54



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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