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	6	5				4	6	13	4	6	3	13	11
Kaiapoi			42	30	36	19	23	28	20	19	24	23	23
Christchurch	60	44	57	37	49	36	39	29	17	22	16	16	34
Ashburton	15	16					18	26	13	15	9	11	15
Timaru	51	54	54	34	54	42	46	36	36	37	36	39	30
Waimate				5	10			10	0	7	10	9	8
Geraldine					3	2			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	75	84				66	86	123	102	61	88*	91	70
Kaiapoi			160	144	171	99	159	161	104	86	86	98	110
Christchurch (St Albans)	221	223	222	216	136	135	154	184	120	139	108	101	112
Ashburton	88	91					84	136	90	90	128*	79	86
Timaru	152	162	154	107	155	117	109	190	128	109	131	142	119
Waimate				56	86			95	50	59	112*	97	64
Geraldine					54	53			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	65	83				55	66	89	62	59	54	84	68
Kaiapoi			129	130	119	89	94	145	90	85	84*	94	87
Christchurch (St Albans)	221	161	174	164	135	135	141	172	115	91	85	92	99
Ashburton	73	83					74	104	72	84	76	78	78
Timaru	114	153	139	110	130	115	107	130	99	95	124	118	108
Waimate				56	75			62	44	59	89	69	60
Geraldine					53	52			51	59	67	58	53

* September 14th 2009 Dust Event

Fourth Highest daily concentrations of PM₁₀ during revious years:

	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008	2009	2010	2011
Rangiora	56	56				54	59	85	54	58	50	61	63
Kaiapoi			117	116	102	83	84	103	77	74	78	86	78
Christchurch	173	133	155	145	103	103	103	118	81	85	75	71	92
Ashburton	69	67					68	88	62	80	71	64	69
Timaru	104	125	117	110	124	103	95	112	83	87	95	106	96
Waimate				55	62			56	39	52	67	59	59
Geraldine					50	47			45	56	58	51	49

Annual average concentrations of PM₁₀ during previous years:

	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008	2009	2010	2011
Rangiora	14	13				15	16	17	15	20	18	17	16
Kaiapoi			29	23	26	22	22	22	19	22	21	21	21
Christchurch	34	28	30	27	30	26	26	25	25	25	23	24	28
Ashburton	22	21					23	23	19	22	21	19	21
Timaru	26	27		27	23	28	25	26	23	28	31	31	27
Waimate				17	19			20	14	19	20	21	19
Geraldine					19	17			19	21	19	19	19