Readings on 30 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)	44(44)	32(-)	32(13)	0.5(5)	29(70)
South	11(7)	45(45)	21(-)	35(15)	0.5(5)	31(72)
East	16(10)	38(38)	8(-)	37(16)	0.4(4)	30(71)
West	25(16)	46(46)	22(-)	30(13)	0.6(6)	33(74)
Central	6(3)	44(44)	17(-)	34(14)	0.3(3)	26(67)

1-hr PM_2.5 (µg/m³)^b Readings on 29 Aug 2015

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Time	1am	2am	3am	4am	5am	6am	7am	8am	9am	10am	11am	12pm
North	15	26	30	25	28	35	38	33	31	32	35	39
South	34	30	34	35	35	38	42	38	39	31	43	28
East	29	31	30	31	40	37	41	32	34	28	33	40
West	29	34	25	33	30	34	35	44	40	36	42	40
Central	26	27	29	24	30	30	31	28	30	28	36	39
Time	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm	10pm	11pm	12am
North	32	37	35	33	27	25	26	20	23	20	21	18
South	28	30	25	17	28	19	35	36	23	23	25	25
East	35	36	33	23	32	32	31	27	14	13	16	19
West	42	38	37	36	30	27	28	28	17	24	27	23
Central	32	24	30	23	22	20	22	21	20	21	23	15

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 29 Aug 2015

Time	1am	2am	3am	4am	5am	6am	7am	8am	9am	10am	11am	12pm
3-hr PSI	69	69	70	71	72	74	77	78	78	75	77	77
Time	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm	10pm	11pm	12am
3-hr PSI	78	77	75	72	70	67	68	67	65	62	61	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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