​Quarterly summaries of environmental monitoring results are provided below.
2019 April - June 3.8 MB
2019 Jan-March3.6 MB
2018 October - December 3.8 MB
2018 July - September3.1 MB
2018 April-June1.6 MB
2018 Jan-March2.7 MB
2017 Oct-Dec2.7 MB
2017 July-Sept2.7 MB
2017 April-June2.5 MB
2017 Jan-March2.6 MB
2016 Oct-Dec2.5 MB
2016 July-Sept2.2 MB
2016 April-June1.9 MB
2016 Jan-March1.7 MB
2015 Oct-Dec4.8 MB
2015 July-Sept1.8 MB
2015 April-June1.7 MB
2015 Jan-March1.9 MB
2014 Oct-Dec2.2 MB
2014 July-Sept3.9 MB
2014 April-June2.4 MB
2014 Jan-March2.1 MB
2013 Oct-Dec1.5 MB
2013 July-Sept1.8 MB
2013 April-June1.8 MB
2013 Jan-March1.6 MB
2012 Oct-Dec4.0 MB
2012 July-Sept4.0 MB
2012 April-June4.4 MB
2012 Jan-March7.5 MB
2011 Oct-Dec4.0 MB
2011 July-Sept6.7 MB
2011 April-June3.2 MB
2011 Jan-March3.0 MB
2010 Oct-Sept4.4 MB
2010 July-Sept3.8 MB
2010 April-June5.7 MB
2010 Jan-March4.6 MB