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Pollutant Concentrations

Readings on 06 May 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 6(4) 44(44) 44(-) 17(7) 0.6(6) 26(67)
South 37(23) 32(32) 13(-) 16(7) 0.4(4) 21(61)
East 15(9) 35(35) 22(-) 29(12) 0.3(3) 25(66)
West 17(10) 45(45) 81(-) 34(14) 0.5(5) 25(66)
Central 10(6) 36(36) 58(-) 17(7) 0.6(6) 23(64)

1-hr PM2.5 (µg/m3)b Readings on 05 May 2015

View reading for:

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
North 42 44 35 33 31 29 27 25 28 23 18 24
South 31 31 26 33 25 22 31 26 44 47 19 14
East 45 37 46 46 44 49 51 32 46 29 28 12
West 31 39 29 28 38 32 33 41 37 37 26 27
Central 21 20 26 26 31 27 30 40 37 26 28 20
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
North 31 25 26 25 21 19 16 19 26 23 15 18
South 12 10 12 14 12 13 12 11 18 17 13 8
East 9 15 15 12 15 17 14 9 7 8 6 4
West 29 16 14 13 14 15 14 12 15 12 26 33
Central 20 18 15 15 16 13 12 14 16 20 30 36

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 05 May 2015

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
3-hr PSI 77 76 75 75 75 75 75 75 77 76 73 66
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
3-hr PSI 61 59 58 56 55 55 54 53 54 55 56 58



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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