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Pollutant Concentrations

Readings on 03 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) 21(-) 29(12) 0.4(4) 11(46)
South 12(8) 24(24) 17(-) 21(9) 0.5(5) 12(49)
East 10(6) 19(19) 15(-) 30(13) 0.5(5) 13(52)
West 8(5) 27(27) 27(-) 19(8) 0.6(6) 15(54)
Central 6(4) 20(20) 48(-) 26(11) 0.3(3) 10(42)

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

View reading for:

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

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 Mar 2015

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
3-hr PSI 43 39 34 32 33 35 33 36 40 51 53 55
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
3-hr PSI 55 53 51 53 55 56 54 51 47 51 51 49



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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