Readings on 23 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	6(4)	27(27)	31(-)	29(12)	0.4(4)	16(56)
South	12(8)	19(19)	13(-)	29(12)	0.4(4)	13(52)
East	7(5)	18(18)	11(-)	30(13)	0.3(3)	12(51)
West	12(7)	30(30)	29(-)	21(9)	0.4(4)	17(56)
Central	6(4)	21(21)	33(-)	24(10)	0.4(4)	10(43)

1-hr PM_2.5 (µg/m³)^b Readings on 22 Jul 2015

View reading for:

Time	1am	2am	3am	4am	5am	6am	7am	8am	9am	10am	11am	12pm
North	32	24	23	21	16	14	10	14	10	10	16	16
South	8	15	7	15	17	10	12	8	5	11	10	13
East	13	14	11	9	10	10	9	5	8	9	14	10
West	21	24	24	29	17	13	3	14	17	15	15	17
Central	8	12	8	9	6	8	10	10	13	11	11	12
Time	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm	10pm	11pm	12am
North	23	17	23	20	16	23	15	12	9	5	10	11
South	10	9	9	14	7	18	18	16	22	24	25	12
East	20	18	18	21	10	18	4	16	8	10	11	12
West	21	16	17	14	24	15	13	11	11	14	12	22
Central	10	15	11	14	17	15	18	8	5	4	5	8

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 22 Jul 2015

Time	1am	2am	3am	4am	5am	6am	7am	8am	9am	10am	11am	12pm
3-hr PSI	54	57	56	56	54	53	46	43	42	45	49	52
Time	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm	10pm	11pm	12am
3-hr PSI	54	55	55	55	55	56	55	54	51	48	48	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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