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Pollutant Concentrations

Readings on 06 Apr 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 9(6) 31(31) 22(-) 34(14) 0.5(5) 17(57)
South 33(21) 24(24) 3(-) 24(10) 0.4(4) 17(57)
East 15(9) 17(17) 11(-) 42(18) 0.5(5) 12(51)
West 19(12) 34(34) 43(-) 45(19) 0.5(5) 21(61)
Central 10(7) 24(24) 48(-) 26(11) 0.3(3) 15(55)

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

View reading for:

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
North 15 15 13 16 11 8 19 20 12 15 32 17
South 12 13 11 17 14 18 22 13 8 31 10 20
East 14 14 11 14 10 13 16 13 13 15 18 11
West 17 17 16 17 13 25 23 31 35 37 25 23
Central 9 8 11 11 12 13 13 8 15 12 24 5
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
North 21 31 24 12 8 18 13 23 17 22 17 12
South 10 24 12 10 4 19 26 15 26 27 22 25
East 9 16 13 8 5 7 12 18 8 11 13 8
West 21 15 12 18 16 28 24 24 9 12 28 27
Central 16 36 26 11 5 15 18 24 25 21 18 10

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 Apr 2015

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
3-hr PSI 55 53 52 53 52 53 55 57 57 58 60 59
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
3-hr PSI 57 58 59 58 51 51 54 59 58 59 58 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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