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Pollutant Concentrations

Readings on 06 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) 26(26) 31(-) 17(7) 0.4(4) 15(55)
South 14(9) 34(34) 13(-) 39(16) 0.4(4) 17(57)
East 7(5) 26(26) 9(-) 58(25) 0.6(6) 18(57)
West 16(10) 37(37) 25(-) 62(26) 0.4(4) 22(63)
Central 9(6) 33(33) 41(-) 50(21) 0.3(3) 19(59)

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

View reading for:

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
North 10 7 13 11 15 12 14 10 15 17 22 19
South 10 15 10 13 15 16 10 11 17 16 31 35
East 10 9 13 15 14 19 18 17 16 23 18 30
West 10 14 11 13 21 21 13 17 19 21 22 33
Central 14 9 13 16 14 19 15 16 13 20 20 31
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
North 21 20 19 22 14 26 8 10 8 14 23 20
South 24 27 28 30 40 20 4 6 6 9 6 17
East 31 26 18 19 32 27 15 9 7 11 15 14
West 31 37 27 30 50 49 25 15 12 13 14 19
Central 26 26 29 23 26 13 16 16 21 16 23 25

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 05 Mar 2015

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
3-hr PSI 44 45 47 51 53 55 55 55 54 56 59 64
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
3-hr PSI 67 69 67 66 68 69 65 57 49 48 52 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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