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Pollutant Concentrations

Readings on 15 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) 17(17) 26(-) 14(6) 0.5(5) 10(41)
South 22(14) 16(16) 9(-) 11(5) 0.3(3) 9(36)
East 12(8) 12(12) 19(-) 19(8) 0.5(5) 8(32)
West 10(6) 19(19) 18(-) 17(7) 0.4(4) 10(42)
Central 10(6) 17(17) 45(-) 15(6) 0.3(3) 9(39)

1-hr PM2.5 (µg/m3)b Readings on 14 Jun 2015

View reading for:

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

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 14 Jun 2015

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
3-hr PSI 55 56 53 52 51 53 55 56 52 32 14 14
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
3-hr PSI 21 27 32 36 35 34 29 30 31 30 27 23



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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