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Pollutant Concentrations

Readings on 10 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 5(3) 22(22) 41(-) 13(5) 0.4(4) 11(45)
South 12(7) 22(22) 13(-) 14(6) 0.5(5) 11(44)
East 5(3) 20(20) 20(-) 20(9) 0.5(5) 13(52)
West 6(3) 22(22) 24(-) 21(9) 0.5(5) 11(44)
Central 10(6) 16(16) 64(-) 20(8) 0.5(5) 9(36)

1-hr PM2.5 (µg/m3)b Readings on 09 Mar 2015

View reading for:

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
North 7 9 10 6 3 4 12 14 16 20 16 13
South 9 13 3 6 4 8 8 7 19 13 16 17
East 9 16 16 14 7 11 12 16 9 15 14 15
West 5 13 9 9 5 8 10 8 7 17 15 15
Central 8 6 6 5 7 7 5 7 10 8 10 8
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
North 10 15 11 6 7 8 8 8 9 11 21 17
South 20 17 6 10 18 6 6 5 4 11 14 13
East 12 19 12 14 8 16 15 5 10 8 16 21
West 12 15 8 10 6 18 4 6 21 8 14 14
Central 10 11 7 5 20 9 11 7 9 9 14 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 09 Mar 2015

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
3-hr PSI 28 36 39 39 31 29 31 38 44 51 53 53
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
3-hr PSI 53 53 51 46 41 45 45 36 35 36 49 52



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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