Home   Haze Updates   Pollutant Concentrations

Pollutant Concentrations

Readings on 03 May 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(2) 28(28) 34(-) 21(9) 0.5(5) 15(55)
South 40(25) 26(26) 8(-) 29(12) 0.4(4) 17(56)
East 20(13) 26(26) 13(-) 31(13) 0.5(5) 18(58)
West 9(5) 25(25) 16(-) 47(20) 0.4(4) 13(52)
Central 14(9) 28(28) 47(-) 24(10) 0.3(3) 16(55)

1-hr PM2.5 (µg/m3)b Readings on 02 May 2015

View reading for:

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
North 15 13 21 18 21 24 13 18 16 7 10 12
South 22 18 21 19 22 24 22 24 18 2 6 23
East 16 13 10 24 28 26 27 24 29 5 6 17
West 17 14 17 21 16 17 11 20 8 6 7 5
Central 10 18 17 16 25 19 26 20 21 5 14 13
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
North 13 15 13 11 13 8 9 17 13 12 25 31
South 33 27 17 14 15 16 8 7 9 18 11 12
East 23 26 31 18 19 22 9 9 10 13 13 14
West 14 14 14 12 10 18 5 12 10 17 10 20
Central 17 22 26 18 16 18 15 7 5 12 12 12

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 02 May 2015

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
3-hr PSI 52 54 56 57 60 61 62 61 60 54 45 39
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
3-hr PSI 53 58 60 58 56 54 52 50 40 47 52 55



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