Home   Haze Updates   Pollutant Concentrations

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 08 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 8(5) 26(26) 18(-) 38(16) 0.4(4) 15(54)
South 20(13) 27(27) 16(-) 31(13) 0.4(4) 20(60)
East 13(8) 25(25) 15(-) 38(16) 0.3(3) 18(58)
West 10(6) 27(27) 11(-) 48(20) 0.4(4) 16(55)
Central 21(13) 24(24) 32(-) 48(20) 0.4(4) 16(55)

1-hr PM2.5 (µg/m3)b Readings on 08 Nov 2014

View reading for:

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

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 08 Nov 2014

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
3-hr PSI 63 67 68 66 62 54 45 44 51 53 51 52
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
3-hr PSI 53 56 58 60 59 59 57 55 53 53 51 -

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.

Back to Top