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Pollutant Concentrations

Readings on 08 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 4(2) 26(26) 42(-) 7(3) 0.6(6) 14(53)
South 23(14) 20(20) 17(-) 6(3) 0.4(4) 12(51)
East 11(7) 15(15) 25(-) 15(6) 0.4(4) 10(43)
West 22(14) 35(35) 39(-) 19(8) 0.8(8) 21(61)
Central 9(6) 18(18) 30(-) 7(3) 0.4(4) 10(43)

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

View reading for:

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
North 22 17 11 6 8 5 11 23 19 15 11 10
South 25 5 5 7 4 7 11 17 14 6 6 5
East 12 8 4 5 8 5 7 10 8 7 9 5
West 31 29 25 22 9 16 8 20 35 29 23 25
Central 19 6 4 5 4 6 7 8 8 9 5 15
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
North 11 13 18 15 14 - 17 21 16 8 14 14
South 9 14 10 14 16 - 17 16 12 19 17 16
East 8 14 15 15 10 - 10 10 15 13 17 16
West 14 15 26 23 15 - 21 34 21 15 16 14
Central 10 11 21 15 10 - 13 13 13 11 13 12

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 May 2015

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
3-hr PSI 67 61 54 44 35 32 32 45 53 55 53 51
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
3-hr PSI 46 50 53 55 55 - 54 56 56 55 54 54



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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