Readings on 28 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)	36(36)	40(-)	28(12)	0.5(5)	22(62)
South	20(12)	26(26)	33(-)	19(8)	0.5(5)	18(58)
East	14(8)	23(23)	17(-)	31(13)	0.8(8)	16(56)
West	48(30)	36(36)	34(-)	20(9)	0.4(4)	22(62)
Central	12(8)	25(25)	32(-)	18(8)	0.4(4)	14(53)

1-hr PM_2.5 (µg/m³)^b Readings on 27 Jul 2015

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Time	1am	2am	3am	4am	5am	6am	7am	8am	9am	10am	11am	12pm
North	12	18	29	30	30	23	27	31	27	26	26	23
South	13	20	16	22	24	13	15	19	16	10	10	12
East	11	17	14	19	21	16	12	10	7	13	19	15
West	11	17	15	22	18	25	24	28	25	23	21	21
Central	12	14	11	14	16	17	17	14	13	9	8	11
Time	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm	10pm	11pm	12am
North	30	25	20	21	20	15	15	13	13	20	15	13
South	21	15	19	10	17	22	27	29	23	20	21	22
East	23	18	11	16	19	15	24	19	20	16	19	21
West	24	25	24	22	23	21	26	33	31	18	16	18
Central	17	20	8	17	10	12	14	16	13	12	17	16

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 27 Jul 2015

Time	1am	2am	3am	4am	5am	6am	7am	8am	9am	10am	11am	12pm
3-hr PSI	50	53	55	58	60	61	60	59	59	58	56	56
Time	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm	10pm	11pm	12am
3-hr PSI	59	60	60	58	57	57	58	60	61	60	58	57

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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