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Air quality in the Canterbury region: Rangiora Airshed

Rangiora Airshed

Rangiora Airshed PM₁₀ Exceedences

Rangiora Airshed PM10 Exceedences

Note: The NES targets for this airshed are provisional.

Source data for PM₁₀ - Rangiora
Year	2005	2006	2007	2008	2009	2010
Method	TEOM (Adjusted)	TEOM (Adjusted)	TEOM & FDMS	TEOM & FDMS	TEOM FDMS	TEOM FDMS
Valid data (%)	99%	100%	97%	74% annual; 99% during May to August	95%	100%
No of exceedences PM₁₀	9	15	4	6	2	13
2^nd highest 24 hour average	78	102	74	59	54	84
Highest 24-hr average	99	138	107	61	88	91
Annual average	19	20	20	<75% valid data	18	17

Source: Environment Canterbury

Note:
(1) The 2009 highest 24-hour average value for this airshed was due to transboundary pollution from the Australian dust storms. The exceedance due to this event has not been included in this table.

Last updated: 2 August 2011