Current issues

Brooklyn air monitoring results for September and October 2014


Three days exceeded the PM10 air quality objective in Brooklyn during September and October.

Observations on the air monitoring results

The results for September and October are a slight improvement on the same period last year, when there were four days that exceeded the objective. This continues the trend of air quality improvements – relative to recent years – that have been recorded in Brooklyn since the middle of February 2014.

With two months of 2014 still to go, Brooklyn has already experienced more dry days with northerly winds than in any other year since air monitoring began in the suburb. This is significant because those are the weather conditions that facilitate the transport of PM10 from the Brooklyn Industrial Precinct to the neighbouring residential area to the south.

An increase in poor air quality in Brooklyn would be expected this year given the prevalence of those weather conditions, so it is encouraging to report there have been slightly fewer poor air quality days this year than in 2010, 2012 and 2013. Only the very wet year of 2011 had fewer poor air quality days than this year. The results for 2014 would be even better except for the four consecutive poor air quality days that occurred due to bushfire smoke in February.

As discussed in the summary for July and August, the gradual improvement in Brooklyn’s air quality during the 2014 autumn, winter and spring seasons compared to the same seasons in previous years is most likely due to a combination of better dust management on industrial sites and targeted works to reduce road dust.

Forecast for the rest of 2014

Despite the improvements during autumn, winter and spring, it is still looking like there will be 25 to 30 days exceeding the PM10 air quality objective in Brooklyn for the third year in a row, which would mean Brooklyn’s air quality remains worse than anywhere else monitored by EPA in Victoria.

Statistics

Air monitoring statistics for Brooklyn Industrial Precinct September–
October 2014
2014 so far
(up to October)
Number of days that exceeded the PM10 air quality objective 3 24
Number of days with consistent northerly winds and no recent rain 14 63
Number of hours of poor air quality 36 213
Percentage of poor air quality occurring between 7 and 11 am 50% 58%
Percentage of poor air quality occurring during northerly winds 92% 77%
Number of poor air quality alerts issued for Brooklyn 4 29

List of days that exceeded the PM10 air quality objective (September–October 2014)
8 September 2014
6 October 2014
22 October 2014

Number of days that exceeded the PM10 air quality objective
September–October 2014 3 2014 (up to October) 24
September–October 2013 4 2013 (up to October) 25
September–October 2012 8 2012 (up to October) 27
September–October 2011 3 2011 (up to October) 12
September–October 2010 2 2010 (up to October) 28

Number of days with consistent northerly winds and no recent rain
September–October 2014 14 2014 (up to October) 63
September–October 2013 3 2013 (up to October) 45
September–October 2012 12 2012 (up to October) 54
September–October 2011 14 2011 (up to October) 45
September–October 2010 4 2010 (up to October) 40

Rainfall (mm)
September–October 2014 46.0 2014 (up to October) 270.6
September–October 2013 96.4 2013 (up to October) 390.6
September–October 2012 47.0 2012 (up to October) 396.6
September–October 2011 102.8 2011 (up to October) 573.0
September–October 2010 157.4 2010 (up to October) 438.0

Page last updated on 19 May 2016