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Pollutant Concentrations

Readings on 08 Jul 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 6(4) 34(34) 46(-) 35(15) 0.5(5) 22(62)
South 8(5) 34(34) 24(-) 37(16) 0.4(4) 20(60)
East 13(8) 30(30) 6(-) 40(17) 0.6(6) 22(62)
West 50(31) 41(41) 25(-) 46(19) 0.8(8) 27(67)
Central 4(3) 32(32) 36(-) 36(15) 0.2(2) 19(59)

1-hr PM2.5 (µg/m3)b Readings on 07 Jul 2015

View reading for:

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
North 22 23 16 19 21 17 14 15 18 18 22 26
South 23 20 20 25 16 13 17 11 15 20 30 20
East 20 23 22 20 17 19 16 15 17 18 18 24
West 29 26 28 22 22 18 23 20 26 25 30 34
Central 21 18 25 16 20 14 16 16 20 13 16 21
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
North 32 36 35 31 22 18 24 22 20 21 15 17
South 13 15 21 24 24 19 14 17 32 19 22 21
East 25 33 26 27 26 17 25 21 25 18 26 24
West 40 35 25 25 29 26 23 24 24 26 32 27
Central 27 27 21 26 22 19 17 20 20 18 15 18

Note:
a Sub-index for nitrogen dioxide is reported only when the 1-hour concentration exceeds 1130 µg/m3.
b There is no sub-index for 1-h PM2.5.

3-hr PSI Readings from 1am to 12am on 07 Jul 2015

Time 1am 2am 3am 4am 5am 6am 7am 8am 9am 10am 11am 12pm
3-hr PSI 63 62 63 62 61 58 57 56 57 57 60 63
Time 1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
3-hr PSI 66 68 68 68 66 64 62 60 62 62 62 61



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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