Branch Lake

Ellsworth, Hancock, Maine
MIDAS 4328

Secchi transparency (mean, maximum & minimum annual values)

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Branch Lake
MIDAS 4328 - Station 1
Year Depth - Meters Depth - Feet
Min Avg Max Min Avg Max
1974 6.4 7.8 9.5 21.0 25.7 31.2
1975 6.6 7.8 8.6 21.7 25.5 28.2
1976 6 7.3 9.5 19.7 23.9 31.2
1977 6.7 6.7 6.7 22.0 22.0 22.0
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 6.5 8.4 11.5 21.3 27.5 37.7
1981 7 7.0 7 23.0 23.0 23.0
1982 n/a n/a n/a n/a n/a n/a
1983 n/a n/a n/a n/a n/a n/a
1984 6.5 7.8 9.2 21.3 25.4 30.2
1985 7.1 8.3 10 23.3 27.2 32.8
1986 7 7.8 8.4 23.0 25.5 27.6
1987 7.9 8.2 8.6 25.9 26.7 28.2
1988 9.5 9.5 9.5 31.2 31.2 31.2
1989 7 7.3 8.1 23.0 24.0 26.6
1990 6.1 7.2 8.5 20.0 23.7 27.9
1991 6.5 7.4 7.7 21.3 24.2 25.3
1992 n/a n/a n/a n/a n/a n/a
1993 n/a n/a n/a n/a n/a n/a
1994 n/a n/a n/a n/a n/a n/a
1995 8.2 9.4 10.3 26.9 30.8 33.8
1996 6.7 7.2 8.2 22.0 23.5 26.9
1997 6.2 8.7 10.1 20.3 28.4 33.1
1998 6.4 9.3 10.4 21.0 30.4 34.1
1999 8.7 9.8 10.5 28.5 32.2 34.4
2000 6.9 9.0 10.9 22.6 29.6 35.8
2001 8.7 9.5 10.9 28.5 31.1 35.8
2002 8.2 9.5 10 26.9 31.0 32.8
2003 8.7 9.8 10.4 28.5 32.2 34.1
2004 n/a n/a n/a n/a n/a n/a
2005 n/a n/a n/a n/a n/a n/a
2006 6.5 7.7 8.3 21.3 25.3 27.2
2007 7.2 8.5 9.7 23.6 27.7 31.8
2008 8.5 9.2 9.8 27.9 30.2 32.2
2009 7.1 8.7 9.6 23.3 28.5 31.5
2010 10.6 11.3 12 34.8 37.1 39.4
2011 8.4 9.4 11 27.6 30.9 36.1
2012 7.8 10.2 11.3 25.6 33.5 37.1
2013 8.4 9.9 11.6 27.6 32.4 38.1
2014 9.5 10.4 11.2 31.2 34.1 36.7
2015 8.9 10.6 12.2 29.2 34.6 40.0
2016 9.1 10.4 11.3 29.9 34.3 37.1
2017 8.5 10.3 11.4 27.9 33.6 37.4
2018 9.3 11.0 12.6 30.5 36.1 41.3
2019 n/a n/a n/a n/a n/a n/a
2020 8.8 9.8 10.7 28.9 32.3 35.1
2021 8.8 10.1 11.8 28.9 33.1 38.7
2022 8.8 10.7 14.1 28.9 35.1 46.3


Understanding Transparency

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

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