Pollution nearly double health limits
Christchurch's pollution reached nearly double the guideline maximum yesterday.
Yesterday was the 18th day of polluted air recorded in the city this year and the highest level recorded this winter by Environment Canterbury.
Air pollution is considered high when the daily concentration of tiny particulates is greater than 50 micrograms per cubic metre of air, as measured from midnight to midnight.
A Woolston monitoring station in King Edward Tce yesterday recorded 94mcg, nearly double the guideline maximum.
A monitoring station in Coles Pl, St Albans, recorded 81mcg.
On Wednesday, the Christchurch air shed recorded a pollution level of 77mcg, the second highest of the year.
By this time last year, Christchurch had recorded 18 days of high air pollution.
Monitoring stations in Rangiora, Kaiapoi, Ashburton, Waimate and Geraldine all recorded high pollution yesterday.
The highest reading was 131mcg in Timaru, which was the 25th day of polluted air this year.
The target for Canterbury was that by September 2016 there would be only three days a year considered as high pollution and only one a year by September 2020.
Health guidelines have now been exceeded on the following dates in Christchurch:
St Albans Woolston
May 8 43 73
May 24 42 75
May 30 55 53
June 2 52 44
June 3 44 51
June 5 59 66
June 8 47 62
June 10 76 59
June 11 46 60
June 21 53 36
July 7 53 60
July 8 57 60
July 9 62 68
July 10 75 66
July 11 44 62
July 13 26 55
July 18 51 77
July 19 81 94
- © Fairfax NZ News
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