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Pollutant Concentrations

Readings on 03 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 8(5) 30(30) 33(-) 27(11) 0.3(3) 15(54)
South 19(12) 30(30) 28(-) 26(11) 0.4(4) 12(49)
East 5(3) 26(26) 27(-) 31(13) 0.4(4) 17(56)
West 4(3) 30(30) 21(-) 18(8) 0.4(4) 13(52)
Central 11(7) 25(25) 16(-) 42(18) 0.3(3) 9(37)

1-hr PM2.5 (µg/m3)b Readings on 02 Feb 2015

View reading for:

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

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 02 Feb 2015

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
3-hr PSI 43 48 52 52 51 47 45 48 50 49 51 52
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
3-hr PSI 51 52 53 53 53 53 53 52 50 52 54 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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