Crawford Pond

Union, Warren, Knox, Maine
MIDAS 4810

Secchi transparency (mean, maximum & minimum annual values)

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Crawford Pond
MIDAS 4810 - Station 1
Year Depth - Meters Depth - Feet
Min Avg Max Min Avg Max
1974 4 4.8 5.5 13.1 15.9 18.0
1975 4.9 5.2 5.5 16.1 17.1 18.0
1976 5.2 5.2 5.2 17.1 17.1 17.1
1977 n/a n/a n/a n/a n/a n/a
1978 n/a n/a n/a n/a n/a n/a
1979 n/a n/a n/a n/a n/a n/a
1980 4 5.5 6.6 13.1 18.0 21.7
1981 5.3 5.9 7.2 17.4 19.4 23.6
1982 4.5 5.2 5.8 14.8 16.9 19.0
1983 4.6 5.2 6.1 15.1 17.1 20.0
1984 5 5.3 5.6 16.4 17.4 18.4
1985 5 5.3 6.3 16.4 17.5 20.7
1986 4.1 4.6 5.4 13.5 15.0 17.7
1987 3.6 5.3 6.3 11.8 17.5 20.7
1988 n/a n/a n/a n/a n/a n/a
1989 3.7 4.5 5.5 12.1 14.6 18.0
1990 4.6 4.9 5.5 15.1 16.1 18.0
1991 4.3 5.3 5.8 14.1 17.4 19.0
1992 2.4 5.1 6.4 7.9 16.8 21.0
1993 2 5.8 8 6.6 19.2 26.2
1994 n/a n/a n/a n/a n/a n/a
1995 4.4 5.5 6.3 14.4 17.9 20.7
1996 n/a n/a n/a n/a n/a n/a
1997 4.5 5.1 5.8 14.8 16.7 19.0
1998 4 4.6 5.1 13.1 14.9 16.7
1999 n/a n/a n/a n/a n/a n/a
2000 4.2 4.5 5 13.8 14.8 16.4
2001 4.4 5.3 6.2 14.4 17.5 20.3
2002 4.4 5.2 5.7 14.4 17.0 18.7
2003 3.7 5.1 7.2 12.1 16.9 23.6
2004 5.1 5.2 5.3 16.7 17.1 17.4
2005 4.8 5.0 5.2 15.7 16.3 17.1
2006 4.6 5.0 5.3 15.1 16.3 17.4
2007 4.9 5.8 6.6 16.1 19.2 21.7
2008 5.4 5.8 6 17.7 19.0 19.7
2009 4.2 4.3 4.5 13.8 14.2 14.8
2010 5.6 6.3 6.9 18.4 20.7 22.6
2011 5.5 6.0 6.3 18.0 19.7 20.7
2012 4.1 5.4 6 13.5 17.6 19.7
2013 4.3 5.1 5.7 14.1 16.6 18.7
2014 n/a n/a n/a n/a n/a n/a
2015 6.5 6.5 6.5 21.3 21.3 21.3
2016 5.1 5.9 6.7 16.7 19.4 22.0
2017 4.8 5.6 6 15.7 18.3 19.7
2018 4.6 5.5 6.1 15.1 18.2 20.0
2019 4.8 4.9 5.1 15.7 16.2 16.7
2020 n/a n/a n/a n/a n/a n/a
2021 3.7 4.3 4.8 12.1 13.9 15.7
2022 4.6 5.8 6.5 15.1 18.9 21.3


Understanding Transparency

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Distribution of Secchi Disk Transparency in All Maine Lakes

Source Data:
Maine Lakes Transparency, Color & Chemistry: Annual Mean Values

Date-specific Secchi data for this and other Maine lakes can be found HERE