Readings on 07 Jul 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	6(4)	34(34)	44(-)	43(18)	0.5(5)	22(62)
South	10(6)	34(34)	7(-)	49(21)	0.4(4)	22(62)
East	12(8)	29(29)	3(-)	56(24)	0.6(6)	21(61)
West	44(27)	41(41)	33(-)	46(20)	0.8(8)	27(68)
Central	8(5)	32(32)	39(-)	46(20)	0.3(3)	20(60)

1-hr PM_2.5 (µg/m³)^b Readings on 06 Jul 2015

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Time	1am	2am	3am	4am	5am	6am	7am	8am	9am	10am	11am	12pm
North	17	16	14	16	18	22	22	27	23	18	25	25
South	19	13	16	23	18	21	20	24	22	23	22	15
East	16	20	22	21	22	19	23	22	18	13	17	21
West	19	25	18	23	23	18	24	28	28	31	23	23
Central	16	17	19	21	20	20	18	22	18	12	20	15
Time	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm	10pm	11pm	12am
North	30	24	18	20	26	22	24	27	30	30	23	6
South	23	22	16	20	15	24	32	29	31	24	29	26
East	22	28	15	21	20	29	29	37	14	19	18	24
West	23	38	36	24	14	17	24	38	50	44	36	28
Central	23	22	16	19	18	21	29	27	20	18	22	18

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 06 Jul 2015

Time	1am	2am	3am	4am	5am	6am	7am	8am	9am	10am	11am	12pm
3-hr PSI	59	58	57	59	59	60	61	62	63	62	61	60
Time	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm	10pm	11pm	12am
3-hr PSI	62	64	64	63	60	60	63	68	71	70	68	65

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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