Readings on 27 Jun 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)	26(26)	39(-)	33(14)	0.5(5)	15(54)
South	10(6)	27(27)	6(-)	28(12)	0.4(4)	14(53)
East	8(5)	22(22)	10(-)	39(17)	0.7(7)	14(53)
West	49(31)	31(31)	30(-)	31(13)	0.4(4)	19(58)
Central	7(4)	25(25)	29(-)	33(14)	0.5(5)	12(51)

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

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Time	1am	2am	3am	4am	5am	6am	7am	8am	9am	10am	11am	12pm
North	10	8	11	10	9	8	14	16	19	14	25	16
South	6	12	8	9	4	15	14	11	10	13	30	17
East	9	8	8	12	13	8	12	10	15	15	17	22
West	12	7	9	19	9	17	18	20	17	16	27	29
Central	5	8	8	8	10	11	13	9	11	11	19	18
Time	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm	10pm	11pm	12am
North	22	22	23	19	21	15	16	17	13	9	10	9
South	7	12	23	19	12	24	22	13	13	13	12	8
East	21	19	18	20	19	16	18	20	10	6	7	7
West	28	26	31	19	22	23	23	17	22	15	12	11
Central	15	24	25	21	16	14	11	16	8	5	4	3

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 Jun 2015

Time	1am	2am	3am	4am	5am	6am	7am	8am	9am	10am	11am	12pm
3-hr PSI	43	38	36	40	41	45	49	52	53	53	57	59
Time	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm	10pm	11pm	12am
3-hr PSI	61	60	61	62	61	59	58	57	55	52	44	36

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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