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Pollutant Concentrations

Readings on 19 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 5(3) 28(28) 41(-) 27(12) 0.5(5) 19(58)
South 13(8) 26(26) 7(-) 24(10) 0.4(4) 17(56)
East 14(9) 21(21) 11(-) 34(15) 0.7(7) 14(54)
West 34(21) 32(32) 30(-) 24(10) 0.4(4) 20(60)
Central 6(4) 24(24) 42(-) 25(11) 0.2(2) 14(53)

1-hr PM2.5 (µg/m3)b Readings on 18 Jun 2015

View reading for:

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
North 27 24 23 15 19 14 22 33 32 15 20 19
South 16 24 15 13 18 15 14 16 22 15 13 15
East 15 18 16 11 16 16 11 19 11 14 16 11
West 21 16 17 20 22 22 10 25 33 25 18 20
Central 18 17 12 18 17 18 11 14 13 9 11 12
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
North 17 14 22 19 11 14 13 13 14 17 16 15
South 19 14 20 10 17 19 14 19 19 18 26 12
East 14 14 11 20 16 17 12 18 17 13 11 11
West 34 25 25 16 24 23 14 15 14 18 14 13
Central 17 15 16 17 15 12 13 13 11 14 13 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 7am to 7pm on 18 Jun 2015

Time 7am 8am 9am 10am 11am 12pm 1pm 2pm 3pm 4pm 5pm 6pm 7pm
3-hr PSI 56 57 59 60 57 55 57 57 58 57 57 56 55



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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