Readings on 20 Jul 2015

View reading for:

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	7(5)	22(22)	34(-)	23(10)	0.5(5)	11(48)
South	9(5)	22(22)	22(-)	20(8)	0.4(4)	9(36)
East	10(6)	19(19)	15(-)	19(8)	0.5(5)	12(48)
West	60(37)	26(26)	25(-)	27(12)	0.3(3)	14(53)
Central	6(3)	23(23)	26(-)	26(11)	0.4(4)	8(35)

1-hr PM_2.5 (µg/m³)^b Readings on 19 Jul 2015

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Time	1am	2am	3am	4am	5am	6am	7am	8am	9am	10am	11am	12pm
North	12	13	6	8	16	12	14	12	10	10	11	12
South	7	12	8	7	10	6	9	7	5	6	5	2
East	11	11	11	15	14	9	9	6	12	10	10	14
West	13	13	8	12	10	9	20	13	14	16	21	14
Central	7	8	14	10	7	8	8	6	9	9	3	10
Time	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm	10pm	11pm	12am
North	14	16	11	11	5	9	7	12	13	18	12	11
South	2	3	2	7	5	15	15	21	13	15	16	11
East	13	10	12	15	9	9	15	12	14	11	11	13
West	14	16	17	11	13	12	17	13	14	17	15	9
Central	12	5	10	8	5	9	6	14	6	9	10	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 19 Jul 2015

Time	1am	2am	3am	4am	5am	6am	7am	8am	9am	10am	11am	12pm
3-hr PSI	40	41	43	43	43	42	45	41	43	41	42	43
Time	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm	10pm	11pm	12am
3-hr PSI	44	44	44	43	39	40	42	51	52	53	52	51

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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