Readings on 02 Sep 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	5(3)	48(48)	47(-)	45(19)	0.7(7)	33(74)
South	9(6)	48(48)	19(-)	58(24)	0.6(6)	31(72)
East	18(11)	43(43)	9(-)	58(25)	0.7(7)	33(75)
West	70(43)	50(50)	13(-)	62(26)	0.5(5)	33(74)
Central	5(3)	44(44)	36(-)	56(24)	0.6(6)	27(68)

1-hr PM_2.5 (µg/m³)^b Readings on 01 Sep 2015

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Time	1am	2am	3am	4am	5am	6am	7am	8am	9am	10am	11am	12pm
North	8	17	13	14	13	17	17	19	20	24	25	30
South	17	16	12	16	11	16	17	13	19	19	31	36
East	12	14	15	16	19	14	22	17	17	26	36	50
West	13	13	16	14	16	18	28	21	28	27	42	45
Central	15	12	9	8	9	14	13	19	21	19	20	32
Time	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm	10pm	11pm	12am
North	42	42	50	40	33	32	48	62	63	54	49	46
South	37	40	40	35	45	45	51	57	42	47	41	41
East	56	44	36	26	26	37	49	56	57	52	47	45
West	50	40	42	41	46	44	47	49	37	41	38	30
Central	38	39	27	36	33	43	43	49	39	45	36	39

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 01 Sep 2015

Time	1am	2am	3am	4am	5am	6am	7am	8am	9am	10am	11am	12pm
3-hr PSI	52	52	53	53	53	54	56	57	59	61	65	72
Time	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm	10pm	11pm	12am
3-hr PSI	80	84	84	81	79	80	84	91	94	94	89	86

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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