Readings on 19 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(4)	25(25)	29(-)	29(12)	0.4(4)	13(52)
South	7(5)	27(27)	20(-)	23(10)	0.4(4)	13(52)
East	10(6)	22(22)	8(-)	28(12)	0.4(4)	14(53)
West	24(15)	30(30)	22(-)	30(13)	0.3(3)	16(55)
Central	5(3)	25(25)	28(-)	30(13)	0.4(4)	11(44)

1-hr PM_2.5 (µg/m³)^b Readings on 18 Jul 2015

View reading for:

Time	1am	2am	3am	4am	5am	6am	7am	8am	9am	10am	11am	12pm
North	14	14	12	14	13	10	14	14	10	5	14	11
South	12	15	7	15	12	6	11	8	11	20	11	8
East	14	14	10	12	14	14	12	12	15	16	19	16
West	14	15	13	15	10	19	12	11	21	18	18	24
Central	8	11	7	8	12	9	15	8	11	10	7	12
Time	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm	10pm	11pm	12am
North	24	20	15	13	14	17	16	14	12	11	11	9
South	1	7	4	6	11	12	25	22	24	47	18	6
East	16	11	13	12	13	20	18	15	15	15	7	9
West	18	18	24	14	19	27	18	10	14	13	8	10
Central	17	10	12	11	11	17	11	12	10	7	11	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 18 Jul 2015

Time	1am	2am	3am	4am	5am	6am	7am	8am	9am	10am	11am	12pm
3-hr PSI	53	53	50	51	48	51	51	48	51	52	53	53
Time	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm	10pm	11pm	12am
3-hr PSI	54	53	53	52	52	54	56	56	55	55	54	52

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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