Upper Narrows Pond

Winthrop, Kennebec, Maine
MIDAS 0098

Secchi transparency (mean, maximum & minimum annual values)

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Upper Narrows Pond
MIDAS 0098 - Station 1
Year Depth - Meters Depth - Feet
Min Avg Max Min Avg Max
1976 4.7 6.0 8.3 15.4 19.8 27.2
1977 5.5 6.5 9.1 18.0 21.3 29.9
1978 4 5.3 6 13.1 17.3 19.7
1979 5.4 6.0 6.9 17.7 19.5 22.6
1980 5 5.8 6.4 16.4 19.0 21.0
1981 3.4 5.6 6.5 11.2 18.3 21.3
1982 4.5 6.2 7.6 14.8 20.2 24.9
1983 3.9 5.2 6 12.8 17.0 19.7
1984 3 4.8 6.9 9.8 15.8 22.6
1985 2.5 5.5 7.5 8.2 18.0 24.6
1986 4.2 5.6 7.4 13.8 18.3 24.3
1987 4.5 6.4 7.5 14.8 21.0 24.6
1988 4.6 6.1 7.5 15.1 19.9 24.6
1989 4 5.0 6 13.1 16.5 19.7
1990 4 5.5 7.5 13.1 18.1 24.6
1991 4.5 5.7 7 14.8 18.7 23.0
1992 3.6 5.6 7 11.8 18.5 23.0
1993 5 6.6 7.5 16.4 21.5 24.6
1994 4.2 6.5 7.9 13.8 21.5 25.9
1995 5.4 7.0 8.3 17.7 23.0 27.2
1996 3.5 5.4 6.5 11.5 17.7 21.3
1997 5.3 6.5 7.3 17.4 21.3 24.0
1998 3.3 5.4 6.6 10.8 17.9 21.7
1999 5 6.6 7.7 16.4 21.7 25.3
2000 4.7 6.0 7.2 15.4 19.6 23.6
2001 4.8 6.7 7.7 15.7 22.0 25.3
2002 4.2 6.4 7.6 13.8 21.0 24.9
2003 5 6.6 8.1 16.4 21.7 26.6
2004 4.9 6.1 6.8 16.1 19.9 22.3
2005 4.4 5.6 7.1 14.4 18.5 23.3
2006 3 5.2 6.3 9.8 17.2 20.7
2007 3.8 6.5 7.7 12.5 21.4 25.3
2008 6 7.0 7.7 19.7 23.0 25.3
2009 5.3 6.5 8.7 17.4 21.5 28.5
2010 6.7 7.7 8.4 22.0 25.4 27.6
2011 5 5.6 6.2 16.4 18.3 20.3
2012 4.6 6.0 6.9 15.1 19.6 22.6
2013 5 5.8 6.5 16.4 19.0 21.3
2014 5.5 6.0 6.8 18.0 19.5 22.3
2015 5.6 6.2 6.8 18.4 20.2 22.3
2016 4.3 6.4 7.6 14.1 20.9 24.9
2017 5 6.3 7.3 16.4 20.7 24.0
2018 4.7 6.7 7.8 15.4 22.0 25.6
2019 5.1 5.8 6.8 16.7 19.1 22.3
2020 5.6 6.5 7.6 18.4 21.2 24.9
2021 6.1 6.6 7 20.0 21.7 23.0
2022 6.9 6.9 6.9 22.6 22.6 22.6


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