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Pollutant Concentrations

Readings on 07 Mar 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 6(4) 34(34) 28(-) 12(5) 0.5(5) 18(58)
South 16(10) 36(36) 13(-) 28(12) 0.4(4) 21(61)
East 7(5) 30(30) 6(-) 52(22) 0.5(5) 21(62)
West 11(7) 42(42) 13(-) 74(31) 0.5(5) 26(67)
Central 9(5) 32(32) 49(-) 38(16) 0.4(4) 20(60)

1-hr PM2.5 (µg/m3)b Readings on 06 Mar 2015

View reading for:

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
North 20 19 17 15 11 20 29 25 25 20 15 11
South 19 21 15 14 10 10 16 19 20 23 29 37
East 18 16 27 25 25 22 26 24 24 25 18 28
West 21 13 12 22 16 21 23 24 26 31 24 36
Central 24 23 19 19 16 18 19 17 17 17 13 25
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
North 16 15 20 21 17 16 17 17 17 19 22 17
South 35 35 29 40 27 17 11 14 9 12 12 19
East 22 20 28 28 22 22 17 13 19 16 14 16
West 32 24 28 35 39 34 37 28 30 17 29 18
Central 22 22 23 21 30 21 22 20 18 19 19 22

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 06 Mar 2015

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
3-hr PSI 58 59 59 58 57 57 59 61 62 63 62 64
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
3-hr PSI 65 66 65 67 68 67 63 60 59 58 58 58



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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