Home   Haze Updates   Pollutant Concentrations

Pollutant Concentrations

Readings on 01 Mar 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 4(3) 19(19) 33(-) 32(13) 0.4(4) 10(40)
South 7(4) 22(22) 16(-) 34(14) 0.4(4) 10(42)
East 10(6) 20(20) 12(-) 37(16) 0.4(4) 13(52)
West 4(2) 23(23) 8(-) 43(18) 0.3(3) 10(44)
Central 10(6) 22(22) 53(-) 35(15) 0.3(3) 11(46)

1-hr PM2.5 (µg/m3)b Readings on 28 Feb 2015

View reading for:

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
North 4 5 5 6 7 6 4 8 13 12 19 14
South 7 8 5 8 10 11 6 7 10 19 16 14
East 10 17 20 9 13 21 7 10 14 13 15 16
West 6 12 12 5 9 5 5 7 12 15 18 15
Central 17 16 10 12 9 10 13 13 17 11 8 11
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
North 8 11 8 8 13 11 11 10 15 10 12 10
South 15 13 11 15 15 18 12 7 7 4 2 5
East 13 8 5 3 6 9 25 27 18 10 15 12
West 19 16 14 6 12 14 7 8 11 6 10 7
Central 14 8 6 6 8 12 15 9 4 14 9 13

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 28 Feb 2015

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
3-hr PSI 34 38 43 42 39 39 38 37 41 51 53 54
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
3-hr PSI 53 52 47 38 38 43 51 52 51 44 41 38



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