McGrath Pond

Belgrade, Oakland, Kennebec, Maine
MIDAS 5348

Secchi transparency (mean, maximum & minimum annual values)

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McGrath Pond
MIDAS 5348 - Station 1
Year Depth - Meters Depth - Feet
Min Avg Max Min Avg Max
1975 4 4.0 4 13.1 13.1 13.1
1976 4.3 4.5 4.7 14.1 14.8 15.4
1977 4.5 5.3 7 14.8 17.3 23.0
1978 3.5 4.9 6.7 11.5 16.2 22.0
1979 3.4 5.2 6.9 11.2 17.1 22.6
1980 2.3 4.6 6.9 7.5 15.0 22.6
1981 4.3 5.5 6.5 14.1 17.9 21.3
1982 4.5 5.2 6 14.8 17.0 19.7
1983 3.5 4.9 5.5 11.5 16.2 18.0
1984 2.5 4.6 6 8.2 14.9 19.7
1985 4.5 5.3 6.5 14.8 17.5 21.3
1986 4 4.8 6 13.1 15.7 19.7
1987 5 5.8 6.5 16.4 19.0 21.3
1988 5 6.0 7 16.4 19.8 23.0
1989 3.5 5.6 7 11.5 18.5 23.0
1990 4 6.7 7.5 13.1 21.9 24.6
1991 5.5 6.3 8 18.0 20.7 26.2
1992 5 6.9 8 16.4 22.5 26.2
1993 5.5 6.8 7.5 18.0 22.4 24.6
1994 4.6 5.9 6.9 15.1 19.2 22.6
1995 4.7 6.4 8 15.4 21.0 26.2
1996 5.3 6.0 6.9 17.4 19.5 22.6
1997 4.9 5.9 7.2 16.1 19.4 23.6
1998 4.4 6.2 7.2 14.4 20.5 23.6
1999 3.9 5.4 6.9 12.8 17.8 22.6
2000 3.8 5.4 6.4 12.5 17.7 21.0
2001 6 6.5 6.9 19.7 21.4 22.6
2002 n/a n/a n/a n/a n/a n/a
2003 5 5.7 6.5 16.4 18.7 21.3
2004 4.7 5.6 6.4 15.4 18.2 21.0
2005 4.9 6.1 6.7 16.1 20.1 22.0
2006 5.2 6.3 6.9 17.1 20.8 22.6
2007 5.7 6.5 7 18.7 21.5 23.0
2008 5.4 6.2 6.8 17.7 20.2 22.3
2009 5.5 6.1 6.8 18.0 20.0 22.3
2010 4.1 5.7 6.4 13.5 18.8 21.0
2011 5.5 6.3 7 18.0 20.8 23.0
2012 5.4 5.4 5.4 17.7 17.7 17.7
2013 6.8 6.8 6.8 22.3 22.3 22.3
2014 5.1 5.1 5.1 16.7 16.7 16.7
2015 6.1 6.6 7 20.0 21.5 23.0
2016 6.2 6.7 7.1 20.3 22.0 23.3
2017 6.4 7.0 7.2 21.0 23.1 23.6
2018 5.9 6.9 9.5 19.4 22.5 31.2
2019 6 6.5 7.2 19.7 21.2 23.6
2020 6.1 6.7 7 20.0 21.9 23.0
2021 3.8 5.2 6.6 12.5 17.1 21.7
2022 5 6.2 7.2 16.4 20.3 23.6


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