Current issues

Brooklyn air monitoring results for September and October 2015


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

Observations

Two days exceeded the PM10 objective during September and October this year, which were the first two days to do so since April. As we approach a summer that is projected to be much hotter and drier than the long-term average, this is a timely reminder that, even though Brooklyn’s air quality has improved considerably this year, dust from the Brooklyn Industrial Precinct can still be blown into neighbouring residential areas to the south by dry, northerly winds. This was best demonstrated on 6 October when PM10 levels in Brooklyn spiked during the strongest northerly winds of the year after a week without any rain.

The results for 2015 so far show there have been nearly three times fewer days exceeding the PM10 objective this year than in previous years, except for the very wet year in 2011.

Work to seal two dusty roads in the Brooklyn Industrial Precinct has been completed and this has helped drive the air quality improvements over the past six months. Despite the promising results over this period, nine days have still exceeded the PM10 air quality objective so far in 2015, which is 50 per cent more than anywhere else monitored by EPA. This shows that more actions are needed to improve Brooklyn’s air quality. With the reduction in PM10 coming from the roads, EPA officers will be better able to target businesses contributing to poor air quality through substandard onsite practices.

Statistics

Air monitoring statistics for Brooklyn Industrial Precinct September–
October 2015
2015 so far
Number of days that exceeded the PM10 air quality objective 2 9
Number of weekdays with consistent northerly winds and no recent rain 10 37
Number of hours of poor air quality 36 163
Percentage of poor air quality occurring between 7 and 11 am 53% 60%
Percentage of poor air quality occurring during northerly winds 78% 83%
Number of poor air quality alerts issued for Brooklyn 3 16
     
List of days that exceeded the PM10 air quality objective (September–October 2015)
6 October 20 October 2015
Number of days that exceeded the PM10 air quality objective
September–October 2015 2 2015 so far (up to October) 9
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 weekdays with consistent northerly winds and no recent rain
September–October 2015 10 2015 so far (up to October) 37
September–October 2014 14 2014 (up to October) 63
September–October 2013 3 2013 (up to October) 45
September–October 2012 11 2012 (up to October) 53
September–October 2011 14 2011 (up to October) 45
September–October 2010 4 2010 (up to October) 40
       
Rainfall (mm)
September–October 2015 44.4 2015 so far (up to October) 287.8
September–October 2014 46.0 2014 (up to October) 270.6
September–October 2013 105.0 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