Readings on 22 Sep 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	4(3)	55(53)	25(-)	15(6)	0.9(9)	37(80)
South	14(9)	48(48)	26(-)	19(8)	0.8(8)	37(79)
East	22(14)	41(41)	17(-)	27(12)	0.6(6)	34(76)
West	55(34)	60(55)	13(-)	17(7)	0.6(6)	46(90)
Central	12(7)	43(43)	39(-)	20(8)	0.7(7)	31(73)

1-hr PM_2.5 (µg/m³)^b Readings on 21 Sep 2015

View reading for:

Time	1am	2am	3am	4am	5am	6am	7am	8am	9am	10am	11am	12pm
North	37	32	33	40	20	23	26	32	45	42	43	50
South	41	25	38	35	25	32	42	26	33	30	41	44
East	35	33	32	33	32	30	33	25	31	36	44	52
West	43	43	44	36	41	41	50	61	56	48	55	68
Central	30	22	29	25	28	26	31	33	36	27	38	45
Time	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm	10pm	11pm	12am
North	57	50	54	42	37	39	45	28	34	32	31	25
South	55	61	47	39	51	39	31	29	37	36	24	28
East	44	38	34	33	36	37	36	35	39	24	25	30
West	69	69	55	52	39	35	34	31	36	39	35	30
Central	41	41	46	43	38	27	25	25	22	32	21	19

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 21 Sep 2015

Time	1am	2am	3am	4am	5am	6am	7am	8am	9am	10am	11am	12pm
3-hr PSI	80	76	76	75	74	72	73	76	79	80	83	87
Time	1pm	2pm	3pm	4pm	5pm	6pm	7pm	8pm	9pm	10pm	11pm	12am
3-hr PSI	94	96	95	90	86	81	79	75	74	74	73	70

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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