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Pollutant Concentrations

Air quality readings will be available hourly from 7am to 11pm. Air quality readings from 12am to 6am will be made available at 7am on the same day.

 

Readings on 07 Nov 2014

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 17(10) 39(39) 41(-) 12(5) 0.6(6) 26(67)
South 4(2) 35(35) 30(-) 11(5) 0.5(5) 25(66)
East 8(5) 32(32) 29(-) 13(6) 0.5(5) 25(66)
West 3(2) 36(36) 12(-) 25(10) 0.5(5) 25(66)
Central 11(7) 32(32) 35(-) 27(11) 0.6(6) 22(63)

1-hr PM2.5 (µg/m3)b Readings on 06 Nov 2014

View reading for:

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
North 24 27 31 29 23 24 24 13 26 28 31 41
South 20 16 27 35 24 24 25 27 29 41 51 46
East 22 33 42 30 27 25 31 25 26 28 33 39
West 41 39 36 29 28 28 21 32 33 25 32 30
Central 23 14 23 29 27 27 27 26 29 31 31 32
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
North 48 34 32 42 7 11 24 22 22 26 20 16
South 52 37 37 30 12 11 2 8 14 24 11 2
East 41 39 36 30 15 13 3 16 13 11 20 9
West 36 29 31 35 23 12 7 11 15 19 11 4
Central 33 25 34 35 15 5 9 12 11 22 11 3

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 Nov 2014

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
3-hr PSI 69 67 69 70 71 68 66 66 67 69 73 76
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
3-hr PSI 81 80 78 75 68 60 47 46 51 56 56 53

Hourly updates of 3-hr PSI readings are provided from 7am to 11pm. The 3-hr PSI readings from 12am to 6am will be made available at 7am on the same day. The 3-hr PSI readings are calculated based on PM2.5 concentrations only.

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