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Pollutant Concentrations

Readings on 06 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) 24(24) 36(-) 26(11) 0.6(6) 10(41)
South 6(4) 28(28) 18(-) 32(13) 0.4(4) 11(48)
East 4(3) 22(22) 6(-) 48(20) 0.4(4) 14(53)
West 3(2) 26(26) 13(-) 32(14) 0.4(4) 13(52)
Central 6(4) 24(24) 27(-) 51(22) 0.3(3) 8(35)

1-hr PM2.5 (µg/m3)b Readings on 05 Feb 2015

View reading for:

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

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 05 Feb 2015

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
3-hr PSI 50 51 50 42 39 42 43 44 45 49 52 53
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
3-hr PSI 54 53 52 49 48 49 49 48 46 40 36 33



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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