Home   Haze Updates   Pollutant Concentrations

Pollutant Concentrations

Readings on 04 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 10(6) 26(26) 38(-) 23(10) 0.3(3) 13(52)
South 17(11) 27(27) 25(-) 26(11) 0.4(4) 10(41)
East 6(4) 26(26) 7(-) 26(11) 0.5(5) 17(56)
West 5(3) 26(26) 9(-) 31(13) 0.4(4) 12(49)
Central 8(5) 22(22) 25(-) 46(20) 0.3(3) 9(37)

1-hr PM2.5 (µg/m3)b Readings on 03 Feb 2015

View reading for:

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

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 03 Feb 2015

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
3-hr PSI 56 55 54 53 53 52 50 48 52 53 54 54
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
3-hr PSI 54 53 54 51 50 43 45 38 33 31 35 36



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