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Pollutant Concentrations

Readings on 02 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 4(2) 20(20) 35(-) 30(13) 0.4(4) 10(42)
South 9(6) 19(19) 9(-) 32(14) 0.4(4) 7(31)
East 10(6) 17(17) 8(-) 34(14) 0.5(5) 11(47)
West 5(3) 21(21) 4(-) 45(19) 0.3(3) 10(42)
Central 6(4) 19(19) 20(-) 33(14) 0.3(3) 9(37)

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

View reading for:

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
North 9 13 13 7 12 9 10 11 12 16 12 11
South 8 5 5 7 5 7 6 3 5 9 8 12
East 13 15 13 18 13 16 9 15 14 11 12 4
West 2 7 7 11 10 6 6 13 6 14 13 12
Central 9 6 10 7 7 7 6 7 9 4 7 15
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
North 7 7 6 8 8 10 9 8 12 8 12 11
South 4 9 6 18 12 6 9 9 4 7 3 7
East 6 4 4 5 5 10 9 17 13 15 13 20
West 6 10 13 9 21 13 23 5 4 13 11 9
Central 11 11 7 10 7 7 10 15 7 10 13 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 01 Mar 2015

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
3-hr PSI 38 37 38 40 41 39 36 36 37 42 42 44
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
3-hr PSI 39 36 31 35 39 42 44 45 43 40 40 45



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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