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Pollutant Concentrations

Readings on 09 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 5(3) 24(24) 37(-) 11(5) 0.5(5) 12(49)
South 19(12) 18(18) 14(-) 8(4) 0.6(6) 10(41)
East 20(12) 15(15) 53(-) 16(7) 0.7(7) 9(39)
West 20(12) 22(22) 39(-) 13(6) 0.4(4) 11(46)
Central 7(4) 19(19) 67(-) 8(3) 0.6(6) 10(43)

1-hr PM2.5 (µg/m3)b Readings on 08 Jun 2015

View reading for:

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
North 12 13 10 9 6 8 19 18 21 20 4 9
South 10 4 2 6 2 5 5 7 10 10 7 15
East 5 6 4 3 5 5 4 8 10 16 6 6
West 11 3 8 4 8 9 8 12 12 9 9 15
Central 4 4 4 4 5 4 10 7 11 21 10 9
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
North 7 11 7 7 10 6 6 8 17 19 19 18
South 21 9 4 10 23 13 6 10 7 8 20 21
East 5 9 11 4 4 12 6 4 6 12 31 44
West 10 9 9 12 8 10 8 11 14 11 24 28
Central 24 10 12 8 6 11 6 5 7 9 26 28

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 08 Jun 2015

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
3-hr PSI 39 32 28 23 22 23 28 36 45 52 49 47
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
3-hr PSI 44 47 44 37 38 40 37 34 33 41 55 61



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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