You are here: Environmental reporting > Air > Air quality > PM10 > By region > Canterbury > Ashburton Airshed

Air quality in the Canterbury region: Ashburton Airshed

Ashburton Airshed

Ashburton Airshed PM₁₀ Exceedences

Ashburton Airshed PM10 Exceedences

Note: The NES targets for this airshed are provisional.

Source data for PM₁₀ - Ashburton
Year	2005	2006	2007	2008	2009	2010
Method	TEOM (Adjusted)	TEOM & FDMS	TEOM FDMS	TEOM FDMS	TEOM FDMS	TEOM FDMS
Valid data (%)	99%	99%	94%	94%	86%	94%
No of exceedences PM₁₀	18	26	13	15	8	11
2^nd highest 24 hour average	80	104	72	84	76	78
Highest 24-hr average	89	136	90	90	128	79
Annual average	23	23	19	22	22	19

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 from this event has not been included in this table.

Last updated: 2 August 2011