Home   Haze Updates   Pollutant Concentrations

Pollutant Concentrations

Readings on 07 Apr 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(7) 35(35) 27(-) 51(21) 0.4(4) 20(60)
South 28(18) 31(31) 14(-) 63(27) 0.4(4) 21(61)
East 21(13) 29(29) 9(-) 68(29) 0.4(4) 20(60)
West 25(16) 39(39) 31(-) 68(29) 0.5(5) 26(66)
Central 16(10) 32(32) 43(-) 57(24) 0.3(3) 23(63)

1-hr PM2.5 (µg/m3)b Readings on 06 Apr 2015

View reading for:

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
North 12 9 8 21 18 15 21 22 21 16 27 26
South 13 8 12 12 12 17 20 17 20 19 32 32
East 9 9 8 9 12 10 7 13 25 35 33 28
West 19 21 13 13 14 8 21 27 30 21 36 33
Central 10 9 9 13 13 13 13 21 32 22 24 27
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
North 27 21 24 27 44 43 24 8 6 12 14 13
South 25 30 29 24 48 47 26 14 19 8 9 7
East 28 29 31 26 46 37 20 18 19 14 14 9
West 25 30 31 21 49 47 51 33 14 15 23 21
Central 26 27 23 29 58 57 31 17 19 18 20 14

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 06 Apr 2015

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
3-hr PSI 56 53 47 48 51 52 54 56 61 63 67 68
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
3-hr PSI 70 69 68 68 76 83 85 73 61 55 54 53



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