Current issues

Brooklyn air monitoring results for May and June 2014


Two days were measured to have exceeded the PM10 air quality objective in Brooklyn during May and June. This is an improvement on the same period last year, when there were seven days that exceeded the objective.

Dry conditions and consistent northerly winds are factors that influence PM10 levels in Brooklyn. It is significant that there were fewer poor air quality days in Brooklyn during May–June 2014 than in the same months in 2013 because there was less rain in the Brooklyn region during the 2014 months. The improvement in Brooklyn’s air quality this May–June compared to last year is most likely due to a combination of improved dust management on industrial sites and targeted works to reduce road dust.

Despite the good results for May and June, more days have been recorded exceeding the PM10 air quality objective so far in 2014 (to the end of June) than at the same stage of any year since 2010. This is a disappointing result, but it is due to weather influences and bushfire smoke impacts rather than an increase in dust emissions from within the Brooklyn Industrial Precinct.

There have been significantly more dry days with northerly winds during 2014 than in any year since 2010, increasing the movement of PM10 from the industrial precinct to the neighbouring residential area to the south. Furthermore, there were four consecutive days in February 2014 when the PM10 air quality objective was exceeded in Brooklyn due to bushfire smoke. These had nothing to do with activities in the precinct. Ignoring those four days, only 2011 would have recorded fewer days exceeding the PM10 air quality objective up to June than 2014.

Air monitoring statistics for Brooklyn Industrial Precinct  May–June 2014 January–June 2014 
Number of days exceeding the PM10 air quality objective  18
Number of days with consistent northerly winds and no recent rain 17  35
Number of hours of poor air quality 25  155
% of poor air quality occurring between 7–11 am  80%  57%
% of poor air quality occuring during northerly winds 84%  73%
Number of poor air quality alerts issued for Brooklyn 8  19
     

Number of days exceeding the PM10 air quality objective 
May–June 2014  January–June 2014  18
May–June 2013 7  January–June 2013  17
May–June 2012 3  January–June 2012  14
May–June 2011 1  January–June 2011  7
May–June 2010 10  January–June 2010  20

List days that exceeded the PM10 air quality objective 
9 May 2014
20 May 2014
 

Number of days with consistent northerly winds and no recent rain 
May–June 2014 17  January–June 2014  35
May–June 2013 17  January–June 2013  29
May–June 2012 14  January–June 2012  26
May–June 2011 8  January–June 2011  21
May–June 2010 9  January–June 2010  27

Rainfall (mm) 
May–June 2014 64.4  January–June 2014   174.4 
May–June 2013 100.8  January–June 2013  200.2
May–June 2012 136.6  January–June 2012  279.4
May–June 2011 73.6  January–June 2011  435.6
May–June 2010 60.2  January–June 2010  198.6

Page last updated on 19 May 2016