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Pollutant Concentrations

Readings on 17 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) 29(29) 51(-) 16(7) 0.6(6) 18(58)
South 20(13) 25(25) 7(-) 24(10) 0.4(4) 17(56)
East 16(10) 22(22) 31(-) 19(8) 0.9(9) 16(56)
West 19(12) 27(27) 58(-) 17(7) 0.6(6) 18(58)
Central 9(6) 25(25) 68(-) 18(8) 0.4(4) 16(55)

1-hr PM2.5 (µg/m3)b Readings on 16 Jun 2015

View reading for:

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
North 29 22 28 13 9 5 8 13 13 24 21 24
South 23 16 22 11 4 3 13 10 14 19 16 18
East 24 23 24 24 9 5 6 7 9 26 19 14
West 27 23 16 7 2 3 7 9 19 26 17 19
Central 20 22 22 12 4 3 5 13 15 23 23 24
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
North 16 13 13 16 20 20 20 21 24 18 23 28
South 19 20 22 22 24 15 24 16 16 15 18 18
East 12 15 12 15 14 19 17 20 17 20 21 21
West 19 15 17 21 20 23 21 31 21 22 27 26
Central 20 13 15 15 16 14 15 17 16 18 17 20

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 7am to 7pm on 16 Jun 2015

Time 7am 8am 9am 10am 11am 12pm 1pm 2pm 3pm 4pm 5pm 6pm 7pm
3-hr PSI 24 31 45 55 59 61 58 57 55 56 57 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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