Readings on 27 Jul 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	4(3)	18(18)	42(-)	14(6)	0.6(6)	9(38)
South	14(9)	17(17)	41(-)	12(5)	0.4(4)	12(51)
East	16(10)	16(16)	35(-)	14(6)	0.9(9)	10(42)
West	44(27)	27(27)	29(-)	16(7)	0.3(3)	15(54)
Central	14(9)	18(18)	41(-)	10(4)	0.5(5)	8(34)

1-hr PM_2.5 (µg/m³)^b Readings on 26 Jul 2015

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Time	1am	2am	3am	4am	5am	6am	7am	8am	9am	10am	11am	12pm
North	6	17	10	7	13	6	7	12	8	4	17	9
South	20	12	14	8	12	9	3	17	7	12	7	8
East	13	9	11	13	9	9	9	4	6	8	12	13
West	12	14	15	10	15	14	21	18	11	7	18	21
Central	9	11	7	6	8	6	8	3	4	6	8	14
Time	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm	10pm	11pm	12am
North	15	12	5	7	5	16	14	5	5	8	4	9
South	23	12	11	17	8	20	8	14	13	11	14	17
East	15	10	8	8	17	16	7	4	11	9	10	12
West	27	20	11	13	15	20	13	11	13	8	16	16
Central	18	7	6	6	7	23	3	7	4	4	11	11

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 26 Jul 2015

Time	1am	2am	3am	4am	5am	6am	7am	8am	9am	10am	11am	12pm
3-hr PSI	46	49	50	46	44	41	41	40	38	35	38	46
Time	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm	10pm	11pm	12am
3-hr PSI	54	54	52	42	39	52	52	50	36	35	39	44

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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