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Pollutant Concentrations

Readings on 05 Mar 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) 29(29) 36(-) 26(11) 0.5(5) 13(52)
South 31(19) 32(32) 11(-) 33(14) 0.5(5) 15(54)
East 11(7) 27(27) 12(-) 34(14) 0.6(6) 18(57)
West 6(4) 33(33) 17(-) 48(20) 0.5(5) 18(58)
Central 11(7) 28(28) 54(-) 26(11) 0.5(5) 14(53)

1-hr PM2.5 (µg/m3)b Readings on 04 Mar 2015

View reading for:

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
North 12 4 8 9 10 10 14 18 13 12 16 9
South 11 12 13 9 10 8 10 12 13 23 22 16
East 13 16 18 21 17 20 18 18 23 15 12 9
West 14 9 12 14 15 9 15 15 14 22 17 17
Central 13 13 13 15 9 8 9 14 26 9 8 11
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
North 21 17 17 20 21 9 6 13 23 14 12 6
South 25 26 26 30 30 21 5 7 8 4 3 6
East 12 23 28 26 31 21 15 15 16 16 9 10
West 30 29 23 29 29 27 14 10 16 21 14 16
Central 17 19 24 29 23 13 3 11 15 10 11 16

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 04 Mar 2015

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
3-hr PSI 49 48 50 51 52 51 51 52 55 56 56 54
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
3-hr PSI 55 58 63 65 66 64 57 52 49 52 52 47



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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