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Pollutant Concentrations

Readings on 08 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) 20(20) 31(-) 16(7) 0.4(4) 12(49)
South 16(10) 27(27) 7(-) 29(12) 0.3(3) 13(52)
East 5(3) 21(21) 3(-) 38(16) 0.4(4) 13(53)
West 5(3) 27(27) 20(-) 40(17) 0.4(4) 14(53)
Central 9(5) 22(22) 37(-) 41(17) 0.3(3) 12(50)

1-hr PM2.5 (µg/m3)b Readings on 07 Mar 2015

View reading for:

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

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 07 Mar 2015

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
3-hr PSI 60 60 60 57 55 55 54 54 54 54 53 52
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
3-hr PSI 53 52 51 45 42 38 37 41 39 37 33 34



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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