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Pollutant Concentrations

Readings on 04 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 4(2) 28(28) 33(-) 27(11) 0.4(4) 16(55)
South 24(15) 24(24) 5(-) 26(11) 0.4(4) 14(53)
East 13(8) 20(20) 11(-) 41(18) 0.5(5) 15(54)
West 26(16) 22(22) 37(-) 18(7) 0.3(3) 13(52)
Central 15(10) 22(22) 23(-) 32(14) 0.4(4) 14(53)

1-hr PM2.5 (µg/m3)b Readings on 03 Jun 2015

View reading for:

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
North 13 8 14 14 14 11 17 16 24 20 25 16
South 8 15 13 11 8 3 5 7 11 33 39 23
East 18 21 16 14 14 16 15 14 14 17 25 25
West 9 9 7 5 7 3 7 11 7 11 16 22
Central 18 16 13 12 11 14 7 10 14 12 20 31
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
North 18 27 33 18 17 14 10 6 13 9 11 10
South 14 11 10 17 11 17 18 13 16 13 18 6
East 16 16 9 17 6 14 8 23 9 13 7 6
West 19 20 20 15 19 22 14 9 12 10 19 13
Central 28 33 10 14 14 7 12 12 10 4 6 6

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 03 Jun 2015

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
3-hr PSI 52 53 52 51 48 44 43 43 50 54 59 62
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
3-hr PSI 63 61 59 58 55 54 53 52 51 48 47 42



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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