Readings on 02 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	8(5)	28(28)	51(-)	25(11)	0.5(5)	18(58)
South	21(13)	27(27)	40(-)	17(7)	0.4(4)	17(57)
East	12(8)	23(23)	21(-)	20(8)	0.8(8)	16(56)
West	31(19)	31(31)	51(-)	24(10)	0.4(4)	19(58)
Central	15(9)	27(27)	44(-)	18(8)	0.5(5)	16(55)

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

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Time	1am	2am	3am	4am	5am	6am	7am	8am	9am	10am	11am	12pm
North	26	34	24	29	20	20	14	10	6	8	5	11
South	10	27	20	22	26	31	15	29	21	18	11	19
East	13	13	19	32	51	40	25	13	12	11	8	13
West	17	23	25	28	30	14	15	21	12	18	16	30
Central	15	16	19	22	20	25	17	11	19	10	10	18
Time	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm	10pm	11pm	12am
North	19	16	9	11	7	20	18	31	23	25	26	23
South	16	16	2	4	8	14	16	32	12	12	16	9
East	14	12	6	6	8	10	18	18	11	13	14	12
West	39	26	9	8	14	23	18	11	12	17	9	10
Central	15	11	6	5	3	12	16	26	19	24	19	14

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 Aug 2015

Time	1am	2am	3am	4am	5am	6am	7am	8am	9am	10am	11am	12pm
3-hr PSI	56	59	60	64	67	68	65	60	55	54	51	53
Time	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm	10pm	11pm	12am
3-hr PSI	56	58	54	40	30	43	53	59	59	59	56	56

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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