Readings on 28 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)	39(39)	19(-)	28(12)	0.5(5)	24(65)
South	14(8)	36(36)	25(-)	24(10)	0.4(4)	23(63)
East	15(10)	32(32)	9(-)	41(17)	0.5(5)	24(64)
West	17(11)	43(43)	28(-)	29(12)	0.5(5)	28(69)
Central	6(4)	36(36)	26(-)	37(16)	0.3(3)	21(61)

1-hr PM_2.5 (µg/m³)^b Readings on 27 Aug 2015

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Time	1am	2am	3am	4am	5am	6am	7am	8am	9am	10am	11am	12pm
North	16	24	30	17	23	20	21	32	26	20	23	28
South	14	15	31	44	25	14	7	21	22	14	18	16
East	21	27	34	35	29	27	23	21	18	10	14	17
West	33	26	18	35	34	32	30	33	21	20	28	26
Central	21	36	34	30	24	17	22	21	15	11	15	20
Time	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm	10pm	11pm	12am
North	36	31	35	47	39	30	20	11	6	13	12	20
South	21	28	25	24	27	22	22	34	28	31	26	16
East	27	31	25	34	36	26	22	22	13	15	21	23
West	30	31	26	39	35	27	23	25	23	26	25	24
Central	22	21	25	18	20	19	20	23	15	18	19	20

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 27 Aug 2015

Time	1am	2am	3am	4am	5am	6am	7am	8am	9am	10am	11am	12pm
3-hr PSI	65	64	66	70	71	68	64	63	63	61	58	58
Time	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm	10pm	11pm	12am
3-hr PSI	63	66	69	71	72	71	67	63	60	60	59	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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