Readings on 12 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)	31(31)	49(-)	11(5)	0.8(8)	16(55)
South	12(8)	32(32)	44(-)	19(8)	0.5(5)	17(57)
East	11(7)	32(32)	46(-)	10(4)	0.7(7)	19(59)
West	36(22)	42(42)	57(-)	9(4)	0.5(5)	23(63)
Central	6(4)	30(30)	40(-)	12(5)	0.7(7)	14(54)

1-hr PM_2.5 (µg/m³)^b Readings on 11 Aug 2015

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Time	1am	2am	3am	4am	5am	6am	7am	8am	9am	10am	11am	12pm
North	11	11	10	7	9	13	10	18	15	13	14	22
South	16	19	21	15	9	17	10	21	12	11	13	15
East	13	13	19	13	20	20	13	13	15	16	20	25
West	17	18	18	12	23	14	17	21	23	17	26	19
Central	12	11	17	12	17	9	9	15	13	9	16	11
Time	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm	10pm	11pm	12am
North	27	23	11	17	19	16	17	15	10	16	23	31
South	22	18	9	23	26	15	22	19	20	22	19	16
East	18	19	14	25	18	13	26	18	15	31	33	28
West	24	22	23	13	21	24	17	21	60	50	23	24
Central	14	17	8	17	24	13	12	22	14	14	23	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 11 Aug 2015

Time	1am	2am	3am	4am	5am	6am	7am	8am	9am	10am	11am	12pm
3-hr PSI	55	54	54	54	54	53	53	54	54	55	55	56
Time	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm	10pm	11pm	12am
3-hr PSI	59	60	57	57	58	59	59	58	61	63	65	65

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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