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Pollutant Concentrations

Readings on 02 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(5) 26(26) 27(-) 5(2) 0.6(6) 15(54)
South 13(8) 26(26) 5(-) 9(4) 0.7(7) 16(55)
East 11(7) 23(23) 17(-) 10(4) 0.8(8) 16(55)
West 5(3) 25(25) 29(-) 24(10) 0.6(6) 13(52)
Central 6(4) 25(25) 51(-) 20(8) 0.7(7) 14(53)

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

View reading for:

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

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 Apr 2015

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
3-hr PSI 55 55 56 58 58 56 55 55 55 53 52 53
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
3-hr PSI 54 54 55 56 55 49 47 52 55 56 55 51



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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