Home   Haze Updates   Pollutant Concentrations

Pollutant Concentrations

Readings on 11 Feb 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) 27(27) 35(-) 44(19) 0.5(5) 13(52)
South 7(5) 33(33) 49(-) 23(10) 0.6(6) 13(52)
East 8(5) 27(27) 4(-) 53(22) 0.7(7) 17(56)
West 3(2) 30(30) 9(-) 44(19) 0.4(4) 15(54)
Central 8(5) 29(29) 79(-) 52(22) 0.4(4) 12(49)

1-hr PM2.5 (µg/m3)b Readings on 10 Feb 2015

View reading for:

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
North 14 17 20 12 13 14 15 16 19 18 21 7
South 15 14 8 11 9 11 5 9 14 17 27 24
East 17 17 17 16 15 15 12 14 20 13 19 14
West 17 15 15 7 17 15 14 16 14 11 18 10
Central 12 9 13 9 10 11 8 8 9 10 12 16
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
North 7 10 7 11 12 7 9 13 16 9 8 8
South 20 19 20 21 20 15 5 8 7 5 8 11
East 12 11 12 17 16 24 20 16 23 21 20 23
West 23 16 16 11 18 17 15 13 22 10 15 4
Central 14 12 14 10 14 11 10 19 14 12 7 15

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 10 Feb 2015

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
3-hr PSI 54 54 54 52 52 51 51 51 52 53 55 55
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
3-hr PSI 56 54 53 53 54 54 54 53 53 53 52 49



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.

Back to Top