Data from past years

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High pollution data from previous years

Read the number of high pollution nights during previous years across our monitoring sites in Canterbury.

Number of high pollution nights during previous years:

	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008	2009	2010	2011
Rangiora	10	7				6	9	15	4	6	3	13	11
Kaiapoi			39	29	35	17	17	28	20	19	24	23	24
Christchurch (St Albans)	50	31	51	28	35	36	32	27	14	18	13	12	28
Ashburton	13	16					18	26	13	15	9	11	15
Timaru	48	50	48	33	50	39	46	36	36	37	38	49	26
Waimate				1	6			10	0	7	10	9	8
Geraldine					5	3			2	6	8	4	3

Highest daily concentrations of PM₁₀ during previous years:

	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008	2009	2010	2011
Rangiora	87	97				78	99	138	107	61	88*	91	70
Kaiapoi			153	138	163	99	152	161	104	86	86	98	110
Christchurch (St Albans)	194	182	220	214	136	135	147	184	120	87	85	91	112
Ashburton	94	97					89	136	90	90	128*	79	86
Timaru	152	162	154	107	155	117	109	190	128	109	134	148	113
Waimate				51	82			95	50	59	112*	97	64
Geraldine					63	55			55	72	94*	58	56

Second highest daily concentrations of PM₁₀ during previous years:

	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008	2009	2010	2011
Rangiora	77	95				67	78	102	74	59	54	84	68
Kaiapoi			126	126	116	89	94	145	90	85	84*	94	86
Christchurch (St Albans)	179	143	174	163	135	135	141	172	99	85	82	72	98
Ashburton	79	85					80	104	72	84	76	78	78
Timaru	109	142	131	106	122	110	107	130	99	96	124	124	108
Waimate				50	73			62	44	59	89	69	60
Geraldine					56	54			51	59	67	58	53

* September 14th 2009 Dust Event