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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 01 Dec 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 7(4) 18(18) 36(-) 11(5) 0.5(5) 10(40)
South 41(26) 21(21) 46(-) 11(5) 0.3(3) 12(51)
East 27(17) 18(18) 31(-) 34(14) 0.2(2) 12(50)
West 9(5) 19(19) 26(-) 28(12) 0.3(3) 10(41)
Central 40(25) 24(24) 49(-) 22(9) 0.5(5) 14(54)

1-hr PM2.5 (µg/m3)b Readings on 01 Dec 2014

View reading for:

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
North 11 5 9 7 9 9 5 7 8 12 4 7
South 23 14 18 11 6 6 4 5 9 5 6 8
East 14 20 12 8 14 13 4 7 6 8 7 6
West 15 17 15 15 13 16 10 5 5 4 7 5
Central 30 25 26 21 15 7 3 1 5 4 7 3
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
North 10 9 10 16 10 10 15 12 12 14 7 -
South 19 28 26 24 14 14 5 6 5 7 4 -
East 9 19 25 26 23 13 11 10 8 8 10 -
West 10 10 12 15 8 5 7 6 10 3 8 -
Central 9 18 32 30 19 20 15 7 6 7 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 01 Dec 2014

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
3-hr PSI 56 57 57 54 52 47 37 28 23 25 27 26
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
3-hr PSI 33 47 56 60 59 56 51 43 37 34 32 -

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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