Home   Haze Updates   Pollutant Concentrations

Pollutant Concentrations

Readings on 09 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 6(4) 21(21) 40(-) 12(5) 0.4(4) 11(46)
South 11(7) 21(21) 6(-) 27(12) 0.3(3) 9(40)
East 5(3) 18(18) 4(-) 38(16) 0.5(5) 12(51)
West 6(4) 24(24) 8(-) 50(21) 0.4(4) 13(52)
Central 7(4) 18(18) 34(-) 39(16) 0.3(3) 9(37)

1-hr PM2.5 (µg/m3)b Readings on 08 Mar 2015

View reading for:

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
North 5 9 13 12 15 14 11 15 16 11 14 11
South 5 13 6 11 9 8 12 13 10 4 2 8
East 7 10 18 16 16 15 16 13 12 12 9 11
West 14 12 12 16 17 13 16 8 12 13 23 16
Central 14 14 12 11 11 10 11 9 10 4 4 9
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
North 14 10 10 7 13 9 8 7 10 13 9 11
South 6 9 26 32 5 3 19 5 3 3 3 3
East 20 10 17 21 5 14 15 7 9 11 6 6
West 15 17 11 11 30 13 4 11 11 7 8 8
Central 7 9 12 14 5 7 11 5 4 7 3 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 08 Mar 2015

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
3-hr PSI 35 39 46 51 52 52 52 51 51 45 43 42
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
3-hr PSI 47 48 52 54 54 52 44 38 36 31 29 29



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