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Pollutant Concentrations

Readings on 04 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 5(3) 28(28) 32(-) 36(15) 0.3(3) 13(52)
South 16(10) 32(32) 7(-) 28(12) 0.4(4) 15(54)
East 10(6) 26(26) 8(-) 37(16) 0.5(5) 17(57)
West 14(8) 36(36) 13(-) 43(18) 0.4(4) 19(59)
Central 7(5) 25(25) 22(-) 34(14) 0.3(3) 11(48)

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

View reading for:

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
North 10 11 18 19 11 15 10 15 9 15 14 16
South 4 9 9 14 5 10 7 7 14 14 17 30
East 26 22 20 18 23 24 23 15 13 17 8 20
West 17 16 18 17 19 16 15 16 20 24 16 29
Central 9 11 9 15 9 6 10 12 13 8 7 11
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
North 26 14 15 14 15 12 12 6 5 13 11 16
South 33 35 36 26 33 18 10 10 4 3 6 7
East 12 13 9 13 17 14 16 22 15 19 14 17
West 10 11 15 33 36 36 27 24 17 14 13 8
Central 7 10 8 13 31 18 6 13 7 18 12 11

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 Mar 2015

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
3-hr PSI 49 52 53 54 54 54 53 53 52 53 53 56
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
3-hr PSI 57 58 56 57 61 62 60 56 52 52 47 50



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.

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