Readings on 27 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(2)	44(44)	45(-)	18(8)	0.5(5)	31(73)
South	13(8)	41(41)	26(-)	31(13)	0.4(4)	27(68)
East	15(9)	34(34)	26(-)	32(13)	0.4(4)	25(66)
West	22(14)	48(48)	48(-)	17(7)	0.6(6)	32(74)
Central	7(4)	37(37)	46(-)	22(9)	0.3(3)	23(64)

1-hr PM_2.5 (µg/m³)^b Readings on 26 Aug 2015

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Time	1am	2am	3am	4am	5am	6am	7am	8am	9am	10am	11am	12pm
North	29	27	28	28	27	28	26	30	28	33	30	29
South	31	36	30	26	27	23	20	21	19	21	24	29
East	31	30	33	24	27	23	18	18	24	24	25	32
West	29	28	32	33	22	22	21	19	29	23	32	39
Central	28	30	25	25	22	22	22	15	22	20	22	26
Time	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm	10pm	11pm	12am
North	42	42	44	44	32	27	22	11	27	31	45	45
South	28	37	47	44	31	36	26	21	21	18	19	11
East	37	45	47	25	29	30	17	18	7	16	15	14
West	47	47	44	47	46	32	31	15	25	31	35	42
Central	32	32	43	33	28	26	17	14	15	11	19	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 26 Aug 2015

Time	1am	2am	3am	4am	5am	6am	7am	8am	9am	10am	11am	12pm
3-hr PSI	72	71	71	70	68	66	64	62	62	63	66	68
Time	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm	10pm	11pm	12am
3-hr PSI	73	78	84	84	81	76	70	63	59	58	63	65

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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