Home   Haze Updates   Pollutant Concentrations

Pollutant Concentrations

Readings on 05 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 9(5) 18(18) 31(-) 25(10) 0.6(6) 7(28)
South 10(6) 20(20) 33(-) 28(12) 0.5(5) 9(37)
East 5(3) 17(17) 7(-) 43(18) 0.4(4) 10(43)
West 9(5) 20(20) 21(-) 27(11) 0.4(4) 9(36)
Central 5(3) 18(18) 43(-) 37(16) 0.4(4) 7(31)

1-hr PM2.5 (µg/m3)b Readings on 04 Feb 2015

View reading for:

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
North 9 6 3 9 6 5 4 17 7 8 5 5
South 4 4 4 2 2 4 3 10 10 5 4 10
East 14 14 8 6 11 6 4 5 5 7 8 8
West 3 7 3 6 6 4 2 4 5 6 4 8
Central 6 4 3 4 3 3 3 6 4 4 6 9
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
North 7 4 6 5 8 7 9 6 8 10 6 5
South 14 13 10 14 11 19 12 15 10 9 13 9
East 15 4 5 11 14 11 20 16 13 13 16 13
West 8 18 13 18 8 9 9 14 14 8 18 10
Central 17 8 8 7 11 16 10 14 10 6 9 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 04 Feb 2015

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
3-hr PSI 35 30 25 23 21 21 18 22 24 28 24 27
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
3-hr PSI 36 41 42 40 42 47 48 51 50 46 46 42



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