Hidden Lake All Years
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| Sample Date | E. Coli | Fecal Coliform | Temperature (C) | Temperature (F) |
| 9/15/2009 | | 33 | 13.0 | 55.0 |
| 9/8/2009 | | 99 | 13.0 | 55.0 |
| 8/31/2009 | | 1,300 | 14.0 | 57.0 |
| 8/24/2009 | | 38 | 13.0 | 55.0 |
| 8/18/2009 | | 34 | 13.0 | 55.0 |
| 8/11/2009 | | 4,100 | 14.0 | 57.0 |
| 8/4/2009 | | 94 | 15.0 | 59.0 |
| 7/28/2009 | | 260 | 16.0 | 61.0 |
| 7/21/2009 | | 88 | 14.0 | 57.0 |
| 7/14/2009 | | 180 | 13.0 | 56.0 |
| 7/7/2009 | | 67 | 14.0 | 57.0 |
| 6/29/2009 | | 38 | 13.0 | 55.0 |
| 6/23/2009 | | 14 | 13.0 | 55.0 |
| 6/15/2009 | | 12 | 14.0 | 57.0 |
| 6/9/2009 | | 22 | 14.0 | 57.0 |
| 6/2/2009 | | 2 | 14.0 | 57.0 |
| 5/26/2009 | | 57 | 14.0 | 56.0 |
| 5/18/2009 | | 22 | 13.0 | 55.0 |
| 5/12/2009 | | 23 | | |
| 9/16/2008 | 270 | 180 | 12.0 | 54.0 |
| 9/9/2008 | 82 | 69 | 16.0 | 61.0 |
| 9/2/2008 | 27 | 19 | 12.0 | 54.0 |
| 8/26/2008 | 3,300 | 1,400 | 15.0 | 59.0 |
| 8/19/2008 | 3,000 | 2,700 | 13.0 | 55.0 |
| 8/12/2008 | 66 | 130 | 12.0 | 54.0 |
| 8/5/2008 | 34 | 30 | 12.0 | 54.0 |
| 7/29/2008 | 51 | 71 | 12.0 | 54.0 |
| 7/22/2008 | 14 | 14 | 12.0 | 54.0 |
| 7/15/2008 | 15 | 9 | 12.0 | 54.0 |
| 7/8/2008 | 31 | 38 | 13.0 | 55.0 |
| 7/1/2008 | 61 | 66 | 13.0 | 55.0 |
| 6/24/2008 | 43 | 39 | 12.0 | 54.0 |
| 6/17/2008 | 35 | 32 | 12.0 | 54.0 |
| 6/10/2008 | 170 | 180 | 10.0 | 50.0 |
| 6/3/2008 | 4,000 | 2,800 | 12.0 | 54.0 |
| 5/27/2008 | 82 | 40 | 14.0 | 57.0 |
| 5/20/2008 | 300 | 280 | | |
| 5/13/2008 | 25 | 21 | | |
| 9/24/2007 | 250 | 240 | | |
| 9/18/2007 | 680 | 890 | 13.0 | 55.0 |
| 9/11/2007 | 250 | 120 | 13.0 | 55.0 |
| 9/4/2007 | 3,000 | 15,000 | 15.0 | 59.0 |
| 8/28/2007 | 32 | 31 | 14.0 | 57.0 |
| 8/21/2007 | 2,400 | 3,000 | | |
| 8/14/2007 | 190 | 140 | 12.0 | 54.0 |
| 8/7/2007 | 99 | 80 | 14.0 | 57.0 |
| 7/31/2007 | 22 | 54 | 15.0 | 59.0 |
| 7/24/2007 | 100 | 160 | 13.0 | 55.0 |
| 7/17/2007 | 180 | 100 | 16.0 | 61.0 |
| 7/10/2007 | 35 | 31 | 15.0 | 59.0 |
| 7/2/2007 | 32 | 37 | 15.0 | 59.0 |
| 6/26/2007 | 80 | 100 | 14.0 | 57.0 |
| 6/19/2007 | 72 | 27 | 13.0 | 55.0 |
| 6/12/2007 | 5 | 6 | 13.0 | 55.0 |
| 6/5/2007 | 34 | 40 | 13.0 | 55.0 |
| 5/29/2007 | 41 | 50 | 11.0 | 52.0 |
| 5/22/2007 | 1,500 | 2,100 | 12.0 | 54.0 |
| 5/15/2007 | 10 | 18 | 13.0 | 55.0 |
| 9/19/2006 | 3,000 | 3,800 | 13.0 | 55.0 |
| 9/12/2006 | 11 | 11 | 13.0 | 55.0 |
| 9/5/2006 | 18 | 27 | 13.0 | 55.0 |
| 8/28/2006 | 46 | 44 | 12.0 | 54.0 |
| 8/22/2006 | 22 | 26 | 13.0 | 55.0 |
| 8/15/2006 | 23 | 21 | 16.0 | 61.0 |
| 8/8/2006 | 41 | 48 | 14.0 | 57.0 |
| 8/1/2006 | 200 | 790 | 13.0 | 55.0 |
| 7/25/2006 | 80 | 79 | 15.0 | 59.0 |
| 7/18/2006 | 48 | 49 | 14.0 | 57.0 |
| 7/11/2006 | 28 | 39 | 14.0 | 57.0 |
| 7/5/2006 | 110 | 170 | 13.0 | 55.0 |
| 6/27/2006 | 120 | 82 | 16.0 | 61.0 |
| 6/19/2006 | 26 | 23 | 15.0 | 59.0 |
| 6/13/2006 | 56 | 83 | 13.0 | 55.0 |
| 6/6/2006 | 90 | 170 | 13.0 | 55.0 |
| 5/30/2006 | 270 | 600 | 12.0 | 54.0 |
| 5/25/2006 | 64 | 106 | 14.0 | 57.0 |
| 5/23/2006 | 4,500 | 5,700 | 13.0 | 55.0 |
| 5/16/2006 | 5 | 5 | 14.0 | 57.0 |
| 9/20/2005 | 6 | 7 | 12.0 | 54.0 |
| 9/13/2005 | 13 | 16 | 11.0 | 52.0 |
| 9/6/2005 | 23 | 22 | 12.0 | 54.0 |
| 8/30/2005 | 180 | 250 | 14.0 | 57.0 |
| 8/23/2005 | 36 | 32 | 14.0 | 57.0 |
| 8/16/2005 | 14 | 12 | 15.0 | 59.0 |
| 8/9/2005 | 26 | 24 | 14.0 | 57.0 |
| 8/2/2005 | 14 | 17 | 15.0 | 59.0 |
| 7/26/2005 | 16 | 18 | 15.0 | 59.0 |
| 7/19/2005 | 41 | 32 | 15.0 | 59.0 |
| 7/12/2005 | 86 | 62 | 15.0 | 59.0 |
| 6/28/2005 | 32 | 35 | 12.0 | 54.0 |
| 6/21/2005 | 140 | 140 | 13.0 | 55.0 |
| 6/14/2005 | 21 | 17 | 14.0 | 57.0 |
| 6/7/2005 | 18 | 23 | 12.0 | 54.0 |
| 5/31/2005 | 60 | 55 | 13.0 | 55.0 |
| 5/24/2005 | 1 | 6 | 14.0 | 57.0 |
| 5/17/2005 | 140 | 170 | 13.0 | 55.0 |
| 9/21/2004 | 11 | 14 | 11.0 | 52.0 |
| 9/16/2004 | 68 | 86 | 12.0 | 54.0 |
| 9/14/2004 | 220 | 470 | 13.0 | 55.0 |
| 9/7/2004 | 33 | 30 | 12.0 | 54.0 |
| 8/31/2004 | 46 | 49 | 13.0 | 55.0 |
| 8/26/2004 | 190 | 280 | 14.0 | 57.0 |
| 8/24/2004 | 1,300 | 4,800 | 15.0 | 59.0 |
| 8/17/2004 | 24 | 15 | 14.0 | 57.0 |
| 8/10/2004 | 23 | 26 | 14.0 | 57.0 |
| 8/3/2004 | 12 | 14 | 13.0 | 55.0 |
| 7/27/2004 | 35 | 44 | 15.0 | 59.0 |
| 7/20/2004 | 16 | 20 | 15.0 | 59.0 |
| 7/13/2004 | 470 | 480 | | |
| 7/6/2004 | 340 | 370 | 14.0 | 57.0 |
| 6/29/2004 | 10 | 6 | 15.0 | 59.0 |
| 6/22/2004 | 17 | 21 | 16.0 | 61.0 |
| 6/15/2004 | 35 | 26 | 13.0 | 55.0 |
| 6/8/2004 | 29 | 34 | 13.0 | 55.0 |
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