Readings on 25 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)	52(51)	43(-)	33(14)	0.5(5)	36(78)
South	10(6)	53(52)	27(-)	39(16)	0.5(5)	35(77)
East	13(8)	45(45)	8(-)	53(23)	0.5(5)	35(77)
West	40(25)	54(52)	33(-)	43(18)	0.6(6)	37(80)
Central	6(4)	49(49)	28(-)	50(21)	0.4(4)	32(73)

1-hr PM_2.5 (µg/m³)^b Readings on 24 Aug 2015

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Time	1am	2am	3am	4am	5am	6am	7am	8am	9am	10am	11am	12pm
North	30	28	30	26	25	30	32	24	33	32	35	34
South	26	32	33	29	29	26	29	25	21	30	30	29
East	32	32	32	27	31	29	30	29	26	31	32	36
West	25	26	29	30	26	24	26	29	33	33	38	45
Central	24	28	29	25	23	27	23	24	29	24	28	33
Time	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm	10pm	11pm	12am
North	37	52	57	53	53	43	38	39	38	41	34	29
South	34	45	41	36	50	38	38	34	45	50	53	38
East	43	55	54	38	42	40	37	33	34	32	32	36
West	55	53	53	44	36	35	32	35	39	53	55	42
Central	36	55	47	31	42	29	34	29	35	36	34	34

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 24 Aug 2015

Time	1am	2am	3am	4am	5am	6am	7am	8am	9am	10am	11am	12pm
3-hr PSI	69	70	70	70	69	68	68	68	69	69	72	74
Time	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm	10pm	11pm	12am
3-hr PSI	78	86	91	91	88	83	82	78	78	81	83	82

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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