Readings on 03 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)	21(21)	30(-)	17(7)	0.4(4)	13(52)
South	16(10)	17(17)	30(-)	18(7)	0.4(4)	9(39)
East	11(7)	15(15)	13(-)	25(10)	0.7(7)	10(43)
West	37(23)	30(30)	30(-)	26(11)	0.4(4)	14(54)
Central	7(5)	17(17)	21(-)	22(9)	0.4(4)	9(36)

1-hr PM_2.5 (µg/m³)^b Readings on 02 Aug 2015

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Time	1am	2am	3am	4am	5am	6am	7am	8am	9am	10am	11am	12pm
North	14	16	10	12	13	11	24	16	14	14	19	16
South	10	13	5	9	8	11	11	15	5	9	16	9
East	10	9	13	10	12	12	13	15	10	8	14	14
West	7	14	18	14	16	20	9	24	30	30	14	13
Central	12	8	9	10	7	10	14	17	12	5	15	7
Time	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm	10pm	11pm	12am
North	14	14	15	10	9	14	11	12	13	7	6	4
South	9	10	6	2	6	16	23	4	8	8	9	7
East	15	10	5	8	12	8	14	9	6	9	6	9
West	13	19	17	10	12	15	7	9	6	6	5	9
Central	10	9	6	7	5	12	9	8	4	6	8	6

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 02 Aug 2015

Time	1am	2am	3am	4am	5am	6am	7am	8am	9am	10am	11am	12pm
3-hr PSI	53	51	47	47	46	49	52	54	54	54	53	53
Time	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm	10pm	11pm	12am
3-hr PSI	52	50	47	41	36	40	48	47	40	32	30	29

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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