Readings on 09 Aug 2015

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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 PM_2.5 (µg/m³)
North	6(4)	28(28)	44(-)	18(8)	0.5(5)	17(57)
South	15(10)	28(28)	44(-)	31(13)	0.5(5)	17(57)
East	11(7)	22(22)	15(-)	34(15)	0.4(4)	16(55)
West	39(24)	34(34)	46(-)	30(13)	0.4(4)	20(60)
Central	6(3)	25(25)	38(-)	32(14)	0.5(5)	15(55)

1-hr PM_2.5 (µg/m³)^b Readings on 08 Aug 2015

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Time	1am	2am	3am	4am	5am	6am	7am	8am	9am	10am	11am	12pm
North	21	20	20	20	11	16	9	18	21	12	15	6
South	18	7	18	15	14	18	12	25	20	20	4	13
East	14	17	13	16	14	17	12	19	14	22	7	6
West	27	27	18	17	22	19	10	20	14	17	15	21
Central	12	13	8	20	17	20	15	15	25	19	5	10
Time	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm	10pm	11pm	12am
North	6	21	22	20	25	14	20	23	27	15	16	21
South	7	23	17	22	13	17	20	22	21	34	17	19
East	8	21	19	22	16	14	20	23	17	17	15	23
West	38	30	19	23	19	17	22	16	18	18	25	16
Central	6	19	17	20	13	11	18	21	14	22	16	14

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 PM_2.5.

3-hr PSI Readings from 1am to 12am on 08 Aug 2015

Time	1am	2am	3am	4am	5am	6am	7am	8am	9am	10am	11am	12pm
3-hr PSI	59	58	56	56	56	57	54	56	56	59	55	52
Time	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm	10pm	11pm	12am
3-hr PSI	46	55	58	61	59	57	57	58	60	60	59	59

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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