Readings on 29 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	4(3)	43(43)	37(-)	25(10)	0.6(6)	25(66)
South	13(8)	42(42)	22(-)	32(14)	0.6(6)	30(71)
East	15(9)	37(37)	12(-)	34(15)	0.4(4)	29(70)
West	15(9)	44(44)	32(-)	20(9)	0.6(6)	29(71)
Central	6(4)	39(39)	28(-)	26(11)	0.4(4)	26(67)

1-hr PM_2.5 (µg/m³)^b Readings on 28 Aug 2015

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Time	1am	2am	3am	4am	5am	6am	7am	8am	9am	10am	11am	12pm
North	20	16	20	22	24	21	25	26	25	34	32	33
South	22	27	22	18	20	26	29	38	29	30	31	29
East	22	25	25	25	23	30	32	25	32	31	35	38
West	20	28	21	28	21	22	19	25	32	37	39	40
Central	25	27	21	18	20	22	24	35	37	25	34	30
Time	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm	10pm	11pm	12am
North	35	31	33	32	21	26	25	25	24	14	21	22
South	31	29	33	34	31	39	34	17	35	39	42	32
East	47	36	38	26	29	29	19	12	21	29	29	29
West	41	30	28	34	34	33	36	33	25	27	28	27
Central	36	27	26	27	22	29	26	22	20	26	25	30

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 28 Aug 2015

Time	1am	2am	3am	4am	5am	6am	7am	8am	9am	10am	11am	12pm
3-hr PSI	61	63	63	63	62	63	64	67	70	72	74	75
Time	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm	10pm	11pm	12am
3-hr PSI	77	76	75	72	71	71	70	68	65	65	68	69

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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