Air quality in the Otago region: Airshed 1 - Alexandra
More detailed air quality information, including data for other towns, can be found on the Otago Regional Council website.
Otago Airshed 1 (Alexandra, Arrowtown, Clyde and Cromwell)
Otago Airshed 1 - (Alexandra, Arrowtown, Clyde and Cromwell) PM10 Exceedences
Note: The NES targets for this airshed are provisional.
| Year | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
|---|---|---|---|---|---|---|
| Method | MetOne BAM | MetOne BAM1020 | MetOne BAM1020 | MetOne BAM1020 and EBAM | MetOne BAM1020 and EBAM | MetOne BAM1020 and EBAM |
| Valid data (%) | 52% | 97% annual, 100% winter (Jun-Aug) | 99% annual; 100% winter | 96% annual; 98% winter (May-Aug) | 98% annual; 96% winter (May-Aug) | Varies; annual; 100% winter |
| No of exceedences PM10 | 42 | 50 | 55 | 91 | 60 | 76 |
| 2nd highest 24 hour average | 92 | 130 | 138 | 126 | 131 | 128 |
| Highest 24-hour average | 103 | 149 | 168 | 150 | 137 | 133 |
| Annual average | <75% valid data | 23 | 19 | 25 | 20 | 24 |
Source: Otago Regional Council
Notes:
(1) From 2006 results represent the consolidation of Alexandra and Arrowtown data. In 2005, the results represent Alexandra only.
(2) From 2008, results represent the consolidation of Alexandra, Arrowtown, Clyde, and Cromwell.
(3) The 2008 annual average does not include Clyde because it does not have the required 75% data capture.
(4) The 2010 annual average is taken from Alexandra.
Last updated: 2 August 2011
