Readings on 10 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(4)	23(23)	39(-)	30(13)	0.5(5)	15(54)
South	21(13)	24(24)	20(-)	43(18)	0.4(4)	15(55)
East	13(8)	20(20)	12(-)	37(16)	0.4(4)	14(53)
West	13(8)	25(25)	34(-)	31(13)	0.4(4)	15(55)
Central	13(8)	23(23)	16(-)	41(17)	0.5(5)	13(52)

1-hr PM_2.5 (µg/m³)^b Readings on 09 Aug 2015

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Time	1am	2am	3am	4am	5am	6am	7am	8am	9am	10am	11am	12pm
North	8	22	19	9	3	2	3	7	4	7	8	9
South	20	17	21	13	3	4	4	9	7	2	8	12
East	19	18	20	19	3	4	5	5	4	7	6	8
West	21	17	25	2	1	3	1	2	3	6	7	8
Central	14	21	16	18	2	4	3	5	5	4	4	14
Time	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm	10pm	11pm	12am
North	11	27	25	23	17	20	21	18	24	26	20	22
South	19	28	26	20	13	17	23	12	21	24	23	24
East	13	19	15	13	12	21	15	16	19	26	20	23
West	26	27	26	28	21	20	24	17	12	18	25	27
Central	15	20	17	17	12	15	17	14	14	22	21	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 09 Aug 2015

Time	1am	2am	3am	4am	5am	6am	7am	8am	9am	10am	11am	12pm
3-hr PSI	57	58	58	57	48	25	12	17	19	22	23	31
Time	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm	10pm	11pm	12am
3-hr PSI	47	57	61	62	59	58	58	58	57	59	61	63

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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