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Pollutant Concentrations

Readings on 02 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) 40(-) 24(10) 0.3(3) 9(36)
South 32(20) 25(25) 22(-) 17(7) 0.3(3) 9(39)
East 5(3) 21(21) 16(-) 48(20) 0.6(6) 13(52)
West 4(2) 27(27) 16(-) 36(15) 0.3(3) 12(48)
Central 14(9) 24(24) 16(-) 44(19) 0.2(2) 8(34)

1-hr PM2.5 (µg/m3)b Readings on 01 Feb 2015

View reading for:

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
North 7 5 8 13 12 11 9 8 8 6 6 11
South 3 6 7 7 4 3 5 10 8 10 11 11
East 8 9 12 14 15 10 14 15 13 12 9 14
West 10 13 8 6 7 10 8 12 13 14 6 21
Central 8 7 3 3 8 7 6 7 8 10 8 11
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
North 8 13 16 8 6 6 9 7 7 7 7 10
South 26 14 17 23 14 11 7 7 3 4 4 8
East 19 11 14 12 9 9 16 14 12 12 16 21
West 19 24 17 15 9 10 9 8 11 5 14 10
Central 15 9 11 9 9 11 8 11 12 6 6 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 01 Feb 2015

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
3-hr PSI 33 32 32 34 35 36 36 38 40 42 39 44
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
3-hr PSI 52 54 55 54 52 45 40 40 39 35 35 37



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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