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Pollutant Concentrations

Readings on 14 Jun 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 7(4) 20(20) 30(-) 17(7) 0.5(5) 11(46)
South 53(33) 23(23) 12(-) 6(3) 0.4(4) 12(50)
East 23(14) 17(17) 36(-) 8(4) 0.6(6) 11(46)
West 17(10) 16(16) 33(-) 19(8) 0.4(4) 8(33)
Central 36(22) 21(21) 61(-) 7(3) 0.4(4) 11(46)

1-hr PM2.5 (µg/m3)b Readings on 13 Jun 2015

View reading for:

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

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 13 Jun 2015

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
3-hr PSI 33 31 29 25 22 23 23 23 20 21 29 36
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
3-hr PSI 43 42 52 54 56 56 54 54 54 54 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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