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Pollutant Concentrations

Readings on 06 Jul 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 9(6) 40(40) 41(-) 49(21) 0.6(6) 29(70)
South 14(9) 35(35) 14(-) 53(22) 0.5(5) 23(63)
East 16(10) 31(31) 3(-) 50(21) 0.3(3) 25(65)
West 52(32) 43(43) 25(-) 51(22) 0.9(9) 30(72)
Central 14(9) 34(34) 44(-) 45(19) 0.3(3) 22(62)

1-hr PM2.5 (µg/m3)b Readings on 05 Jul 2015

View reading for:

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
North 17 14 23 30 28 23 26 24 20 28 29 28
South 25 20 22 21 19 19 23 26 16 17 12 5
East 18 24 24 24 21 21 18 18 19 16 24 22
West 17 21 22 28 27 31 27 30 33 37 43 24
Central 19 19 22 20 21 17 14 11 21 11 19 26
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
North 39 55 45 30 27 27 35 39 35 26 21 16
South 22 24 21 22 18 35 45 25 35 29 23 21
East 27 30 28 19 22 39 43 36 28 26 23 19
West 28 45 34 26 27 34 53 41 21 29 24 22
Central 26 31 25 19 29 25 42 31 19 22 16 18

Note:
a Sub-index for nitrogen dioxide is reported only when the 1-hour concentration exceeds 1130 µg/m3.
b There is no sub-index for 1-h PM2.5.

3-hr PSI Readings from 1am to 12am on 05 Jul 2015

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
3-hr PSI 58 59 61 62 64 64 63 62 62 62 64 63
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
3-hr PSI 66 70 74 71 67 67 75 79 77 71 66 63



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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