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Pollutant Concentrations

Readings on 05 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 3(2) 19(19) 38(-) 11(5) 0.5(5) 11(44)
South 13(8) 18(18) 9(-) 13(6) 0.5(5) 12(49)
East 10(7) 16(16) 24(-) 15(6) 0.6(6) 11(47)
West 31(19) 24(24) 50(-) 19(8) 0.4(4) 14(53)
Central 7(5) 18(18) 59(-) 12(5) 0.4(4) 10(42)

1-hr PM2.5 (µg/m3)b Readings on 04 Jun 2015

View reading for:

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
North 7 4 8 7 6 4 5 7 9 7 10 12
South 4 4 5 7 10 2 4 11 14 16 17 12
East 3 7 6 8 6 4 8 10 4 12 11 11
West 12 8 6 6 4 8 7 11 11 16 14 16
Central 6 2 4 6 6 4 5 6 9 7 9 7
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
North 11 11 14 18 23 16 9 13 12 13 19 12
South 10 11 15 10 18 11 22 17 27 18 13 5
East 9 13 16 31 12 9 6 12 14 22 25 12
West 18 21 28 21 24 17 14 5 17 14 15 19
Central 10 13 16 14 15 18 10 8 17 14 18 16

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 04 Jun 2015

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
3-hr PSI 37 27 24 24 27 24 22 26 33 41 46 49
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
3-hr PSI 49 51 54 56 58 57 54 51 53 54 57 55



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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