Temperature 37° F = 3°C
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  Spring Brook & Clinton |
  Spring Brook & Gustafson |
  Spring Brook & Townhall |
  Spring Brook & Colley |
 Water Sampling |
 Road Salt |
  Turtle Creek & Butterfly |
  Turtle Creek & Colley |
  Turtle Creek & Blackhawk |
  Rock River & Henry |
  Rock River & Shirland |
  Rock River & Prairie Hill |
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Sampling Sites: 2023 2021 2020 2019 2018 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2000 1999