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Pollutant Concentrations

Readings on 10 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) 23(23) 31(-) 15(6) 0.5(5) 14(53)
South 53(33) 28(28) 10(-) 9(4) 0.3(3) 18(58)
East 35(22) 25(25) 20(-) 9(4) 0.5(5) 18(58)
West 14(9) 21(21) 41(-) 18(8) 0.2(2) 13(52)
Central 30(19) 25(25) 54(-) 9(4) 0.3(3) 16(56)

1-hr PM2.5 (µg/m3)b Readings on 09 Jun 2015

View reading for:

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
North 15 15 14 21 26 28 17 22 24 17 11 12
South 21 25 24 27 24 18 20 23 20 14 27 24
East 37 35 25 27 22 31 23 29 26 14 21 15
West 26 20 13 17 14 21 18 19 12 12 13 17
Central 25 25 29 21 15 20 22 20 22 10 14 15
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
North 6 6 9 8 13 12 7 11 9 12 10 15
South 15 15 23 19 14 25 5 26 13 3 4 7
East 4 13 10 13 11 15 19 15 12 8 4 7
West 6 9 6 10 10 14 8 7 5 7 4 14
Central 6 11 8 14 14 13 20 23 17 12 3 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 09 Jun 2015

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
3-hr PSI 66 66 64 63 61 62 62 62 61 59 57 55
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
3-hr PSI 53 52 46 48 50 53 52 54 52 50 34 32



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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