Readings on 04 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	6(3)	19(19)	46(-)	8(3)	0.6(6)	10(43)
South	14(9)	19(19)	32(-)	15(6)	0.5(5)	10(42)
East	7(4)	15(15)	17(-)	23(10)	0.7(7)	9(39)
West	13(8)	23(23)	31(-)	19(8)	0.3(3)	12(51)
Central	8(5)	19(19)	41(-)	14(6)	0.5(5)	9(36)

1-hr PM_2.5 (µg/m³)^b Readings on 03 Aug 2015

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Time	1am	2am	3am	4am	5am	6am	7am	8am	9am	10am	11am	12pm
North	7	7	4	10	9	9	10	11	3	7	11	18
South	8	13	7	15	6	14	10	6	8	9	11	20
East	10	9	12	11	9	8	14	17	6	6	11	11
West	7	8	11	7	8	13	11	6	3	6	15	20
Central	6	8	5	6	9	9	9	13	8	6	11	12
Time	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm	10pm	11pm	12am
North	15	19	20	21	15	9	5	7	5	8	9	9
South	20	13	14	7	6	6	6	5	7	11	7	11
East	9	7	15	13	9	9	3	5	4	9	8	10
West	23	15	22	10	8	6	7	6	44	19	9	8
Central	9	11	20	9	10	8	3	8	8	6	7	8

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 03 Aug 2015

Time	1am	2am	3am	4am	5am	6am	7am	8am	9am	10am	11am	12pm
3-hr PSI	30	33	34	37	36	40	41	44	37	31	34	48
Time	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm	10pm	11pm	12am
3-hr PSI	54	54	55	54	52	41	31	26	34	42	45	39

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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