Home   Haze Updates   Pollutant Concentrations

Pollutant Concentrations

Readings on 28 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 4(3) 23(23) 41(-) 40(17) 0.4(4) 13(52)
South 9(5) 25(25) 10(-) 44(18) 0.3(3) 14(53)
East 12(7) 20(20) 11(-) 45(19) 0.8(8) 15(55)
West 3(2) 27(27) 4(-) 51(22) 0.4(4) 15(54)
Central 8(5) 25(25) 45(-) 43(18) 0.3(3) 14(53)

1-hr PM2.5 (µg/m3)b Readings on 27 Feb 2015

View reading for:

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

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 27 Feb 2015

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
3-hr PSI 51 54 57 57 54 49 45 49 53 56 58 59
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
3-hr PSI 60 61 59 58 55 53 52 49 44 39 36 34



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