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Pollutant Concentrations

Readings on 03 Jun 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(3) 24(24) 43(-) 16(7) 0.4(4) 13(52)
South 13(8) 19(19) 10(-) 15(6) 0.4(4) 12(48)
East 11(7) 17(17) 41(-) 22(9) 0.7(7) 11(48)
West 17(11) 32(32) 22(-) 20(8) 0.4(4) 19(59)
Central 8(5) 18(18) 68(-) 18(8) 0.5(5) 11(44)

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

View reading for:

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
North 10 9 10 10 10 4 18 16 15 17 10 13
South 15 13 7 7 4 7 4 9 12 19 9 12
East 8 8 10 5 7 7 9 11 10 12 15 14
West 31 34 28 30 19 19 20 27 26 16 17 20
Central 9 11 9 8 7 5 8 6 11 9 16 11
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
North 15 12 16 17 16 17 11 12 11 13 20 15
South 14 12 20 17 17 14 4 11 23 9 6 11
East 10 13 12 12 10 10 10 17 16 15 17 19
West 17 15 15 25 20 12 25 5 7 10 5 8
Central 16 11 17 14 14 8 7 9 9 10 13 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 02 Jun 2015

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
3-hr PSI 53 54 53 52 47 41 41 47 52 54 54 53
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
3-hr PSI 53 53 53 54 56 54 52 49 50 50 51 51



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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