"TetraBDE concentrations in Lake Trout from Lake Ontario, Canada, 1997 to 2018",, ,, Year,Number of samples,Average concentration (nanograms per gram wet weight) 1997,4,67 1998,4,61 1999,8,66 2000,7,147 2001,4,92 2002,4,107 2003,8,89 2004,8,65 2005,12,60 2006,14,47 2007,11,54 2008,24,54 2009,24,36 2010,10,47 2011,10,28 2012,10,25 2013,10,22 2014,15,33 2015,10,33 2017,37,17 2018,10,23 ,, "Note: In the table, tetraBDE concentrations are expressed as an annual geometric average. In 2013, Environment and Climate Change Canada published Federal Environmental Quality Guidelines for PBDEs to assess the ecological significance of levels of PBDEs in the environment. The Federal Environmental Quality Guideline for tetraBDE in fish tissues is 88 nanograms per gram of wet weight.",, Source: Environment and Climate Change Canada (2019) National Fish Contaminants Monitoring and Surveillance Program.,, Available on the Environmental indicators website (www.canada.ca/environmental-indicators).,,