Readings on 04 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	5(3)	35(35)	45(-)	39(16)	0.5(5)	23(63)
South	10(6)	36(36)	11(-)	35(15)	0.4(4)	23(63)
East	11(7)	31(31)	14(-)	44(18)	0.5(5)	22(62)
West	60(38)	41(41)	28(-)	42(18)	0.8(8)	26(67)
Central	14(9)	34(34)	39(-)	36(15)	0.3(3)	19(59)

1-hr PM_2.5 (µg/m³)^b Readings on 03 Jul 2015

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Time	1am	2am	3am	4am	5am	6am	7am	8am	9am	10am	11am	12pm
North	27	18	13	17	17	18	21	19	25	32	26	31
South	32	18	21	15	18	16	22	23	20	30	30	21
East	18	19	18	16	21	21	21	22	16	22	24	31
West	25	21	18	17	17	18	22	18	26	27	35	33
Central	16	18	20	16	16	16	19	16	19	17	21	25
Time	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm	10pm	11pm	12am
North	31	35	31	34	25	23	25	22	18	16	19	13
South	20	26	15	29	32	25	22	16	30	16	24	27
East	22	30	27	27	25	33	25	23	15	19	21	18
West	28	35	31	26	27	24	32	36	31	24	31	32
Central	28	26	22	23	26	19	26	22	13	12	8	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 03 Jul 2015

Time	1am	2am	3am	4am	5am	6am	7am	8am	9am	10am	11am	12pm
3-hr PSI	68	64	60	57	57	57	59	59	61	62	65	68
Time	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm	10pm	11pm	12am
3-hr PSI	68	69	68	69	68	67	67	65	64	61	60	60

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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