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Pollutant Concentrations

Readings on 08 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) 31(-) 15(6) 0.5(5) 14(53)
South 22(14) 18(18) 10(-) 13(6) 0.4(4) 11(45)
East 22(13) 12(12) 28(-) 16(7) 0.8(8) 8(31)
West 20(13) 22(22) 30(-) 20(8) 0.3(3) 11(44)
Central 12(7) 19(19) 42(-) 17(7) 0.4(4) 11(47)

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

View reading for:

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
North 24 25 29 23 22 7 3 9 13 10 10 10
South 24 8 3 4 4 3 10 8 7 4 8 10
East 24 4 4 5 6 5 9 10 9 5 9 8
West 23 23 17 14 5 5 9 13 6 11 17 9
Central 24 20 28 18 18 3 5 8 9 3 13 6
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
North 8 6 7 14 12 11 14 10 16 18 18 14
South 13 4 5 4 3 1 2 12 12 14 12 6
East 4 6 7 3 3 3 6 15 6 7 6 4
West 7 5 7 9 6 10 9 9 7 12 12 10
Central 10 5 6 9 7 8 20 15 10 9 5 9

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 Jun 2015

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
3-hr PSI 62 60 58 54 52 39 31 30 36 35 38 37
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
3-hr PSI 39 31 28 27 28 29 32 40 45 48 48 45



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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