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Pollutant Concentrations

Readings on 07 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) 22(22) 30(-) 19(8) 0.6(6) 10(42)
South 8(5) 25(25) 38(-) 20(9) 0.4(4) 10(42)
East 6(4) 19(19) 3(-) 35(15) 0.6(6) 12(49)
West 3(2) 23(23) 17(-) 24(10) 0.4(4) 10(43)
Central 9(5) 22(22) 51(-) 45(19) 0.4(4) 9(37)

1-hr PM2.5 (µg/m3)b Readings on 06 Feb 2015

View reading for:

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

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 06 Feb 2015

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
3-hr PSI 36 34 35 36 42 40 34 26 24 28 36 40
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
3-hr PSI 46 45 52 50 53 53 54 52 51 45 43 41



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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