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Air quality in the Canterbury region: Christchurch Airshed

Christchurch Airshed

Christchurch Airshed PM₁₀ Exceedences

Christchurch Airshed PM10 Exceedences

Note: The NES targets for this airshed are provisional.

Source data for PM₁₀ - Christchurch
Year	2005	2006	2007	2008	2009	2010
Method	TEOM FDMS	TEOM FDMS	TEOM FDMS	TEOM FDMS	TEOM FDMS	TEOM FDMS
Valid data (%)	98%	99%	99%	98%	97%	99%
No of exceedences PM₁₀	39	29	16	22	15	16
2^nd highest 24 hour average	141	172	115	91	85	92
Highest 24-hr average	154	184	120	139	108	101
Annual average	20	21	18	20	18	17

Source: Environment Canterbury

(1) The Christchurch airshed has multiple monitoring sites. The annual averages reported here are based on the St Albans monitoring site only. Other results are a consolidation of the multiple sites.
(2) In 2009, one exceedance occurred because of transboundary pollution from the Australian dust storms. This exceedance has not been included in this table.

Last updated: 27 January 2012