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Pollutant Concentrations

Readings on 07 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 11(7) 37(37) 51(-) 35(15) 0.6(6) 22(62)
South 50(31) 29(29) 30(-) 10(4) 0.5(5) 18(57)
East 20(12) 22(22) 55(-) 27(12) 0.6(6) 16(55)
West 15(9) 41(41) 218(-) 33(14) 0.7(7) 25(65)
Central 29(18) 41(41) 92(-) 23(10) 0.6(6) 24(65)

1-hr PM2.5 (µg/m3)b Readings on 06 May 2015

View reading for:

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
North 23 34 27 19 19 12 15 25 23 16 17 17
South 12 6 5 5 9 4 10 11 12 14 5 17
East 5 7 5 18 28 6 5 15 7 12 9 6
West 33 32 30 40 33 27 15 23 24 20 16 10
Central 37 17 14 31 28 24 26 21 19 12 5 7
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
North 20 29 25 25 32 28 28 7 15 12 24 37
South 17 19 31 23 29 13 22 33 34 33 31 28
East 24 13 26 14 26 14 22 23 25 25 25 22
West 12 20 8 11 22 18 6 27 53 45 32 32
Central 20 28 31 26 31 25 23 34 31 34 29 24

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 06 May 2015

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
3-hr PSI 60 60 59 59 61 60 57 55 56 57 53 51
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
3-hr PSI 53 57 62 62 64 63 63 62 66 70 71 70



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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