Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
WINTHROP KENNEBEC 12 1 4.62 flushes/yr 166 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
10 m
(33 ft) 		3 m
(11 ft) 		32 ha
(79 ac) 		1,102,867 m3
(894 ac-ft) 		7 km2
(2.6 mi2)

Secchi Disk Transparency Graphs

Graph Legend: Secchi symbols = average Secchi Disk Transparency Values; tick marks = maximum and minimum values for each year.

Water Chemistry and Trophic State Parameters

Table Legend:

Color: Color (SPU), Alk: Alkalinity (mg/l CaCO3), SpCon: Specific Conductivity (\(\mu\)S/cm), pH: pH (standard units)

TP = Total Phosphorus (\(\mu\)g/L) – EC: Epilimnion Core, SG: Surface Grab, BG: Bottom Grab, PG: Profile Grab

SDT = Secchi Disk Transparency (m) – Min: minimum value, Avg: average value, Max: maximum value, n: number of months with Secchi readings per year, b: number of times Secchi disk was observed touching the bottom of the lake per year

Chl = Chlorophyll-a (\(\mu\)g/L) – Min: minimum value, Avg: average value, Max: maximum value
Year Color Alk SpCon pH TP-EC TP-SG TP-BG TP-PG SDT-Min SDT-Avg SDT-Max SDT-n SDT-b Chl-Min Chl-Avg Chl-Max
1976 51 2.0 3.3 4.1 7 2.6 5.2 7.7
1978 28 3.0 3.0 3.0 2
1979 22 34 2.2 3.2 4.3 7 3.1 8.2 17.4
1980 46 94 1.6 3.0 4.5 7 5.9 20.0 59.7
1981 75 1.8 2.4 3.0 6 8.4 14.0 23.9
1982 38 54 0.8 2.7 4.4 7 5.4 21.6 45.6
1983 19 80 28 0.9 2.6 4.1 6 4.0 16.0 48.8
1985 62 20 1.4 2.6 4.1 5
1986 27 1.3 2.8 4.8 5
1987 18 38 1.8 2.9 4.4 5
1988 13 2.2 3.2 4.9 6
1990 23 6.9 2.6 3.5 4.6 3
1991 17 7.0 145 2.1 3.3 3.8 5
1992 19 7.1 2.9 3.7 4.8 5
1993 20 7.0 127 3.4 3.7 4.2 5 1.1 5.0 10.0
1994 19 6.9 130 2.1 3.2 4.4 5 9.5 15.9 28.6
1995 18 6.8 91 3.4 3.9 4.7 5
1996 76 2.7 3.3 3.6 5 1.6 11.6 18.0
1997 20 6.8 58 2.1 2.8 3.4 5 7.5 11.0 14.5
1998 103 2.0 3.1 4.3 6 2.7 22.8 53.6
1999 96 1.5 2.8 5.0 6 5.3 23.7 58.1
2000 16 7.0 91 2.0 3.0 4.2 6 5.1 10.6 15.0
2001 17 7.0 58 2.7 4.1 5.0 6 3.9 8.6 16.6
2002 16 7.0 25 60 2.0 3.2 4.8 8 2.5 9.8 15.6
2003 20 7.1 140 85 1.7 2.9 4.0 6 8.9 13.9 27.5
2004 16 7.0 93 2.4 3.5 4.5 4 5.7 10.1 14.2
2005 17 87 3.0 4.0 4.5 5 6.6 8.1 12.1
2006 35 22 74 6.8 160 2.9 3.6 4.1 4 4.0 7.0 10.0
2007 20 7.1 88 3.7 4.2 4.8 4 3.5 6.9 11.0
2008 20 6.9 50 2.6 3.8 4.3 6 3.6 9.7 21.0
2009 24 44 2.8 3.2 3.5 5 6.8 12.0 24.0
2010 22 46 2.2 3.4 5.1 6 4.0 11.4 19.0
2011 21 33 2.8 3.5 3.8 4 5.3 9.6 15.0
2012 22 21 68 7.6 13 72 2.0 3.8 4.9 4 3.5 10.7 27.0
2013 22 18 147 3.0 4.1 5.1 4 4.9 9.3 18.0
2014 22 15 77 3.2 4.8 6.2 5 3.7 7.8 14.0
2015 21 17 142 3.1 4.0 4.6 5 5.7 10.2 15.0
2016 21 19 50 2.1 4.1 6.4 6 1.4 8.7 19.0
2017 20 13 195 3.8 4.6 5.6 5 3.8 6.6 12.0
2018 27 22 91 7.2 14 129 2.9 4.6 6.7 5 2.0 7.2 13.0

Lake Chemistry and Trophic Summary Data - Overall Summary Values:

Avg Color Avg Alk Avg SpCon pH Avg TP-EC Avg TP-SG Avg TP-BG Avg TP-PG SDT-Min SDT-Avg SDT-Max SDT-n Chl-Min Chl-Avg Chl-Max
28 20 75 7 32 123 82 0.8 3.4 6.7 5.3 1.1 11 60

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2013-08-12
2014-08-14
2015-08-17
2016-08-15
2016-09-12
2017-08-11
2017-09-14
2018-08-28
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 24 7.8 23.9 6.8 27.1 8.0 25.4 8.5 23 8.3 25.4 8.3 21.6 25.0 9.1
1 23 7.9 23.1 6.9 25.8 8.2 25.4 8.5 23 8.3 24.4 8.3 20.7 24.8 9.0
2 22 7.7 22.8 6.6 24.8 8.4 24.9 8.8 23 8.3 24.3 8.4 20.5 24.4 9.2
3 22 6.0 22.4 5.9 23.5 7.8 24.0 8.5 23 8.0 24.0 8.3 19.7 23.6 7.6
4 20 2.5 20.9 2.4 17.0 12.4 23.3 6.4 22 7.6 20.5 9.2 18.8 21.9 4.8
5 15 0.2 17.5 0.7 13.1 1.7 19.0 0.8 19 0.5 13.9 0.7 17.1 17.6 1.2
6 13 1.0 13.0 0.3 10.3 0.4 14.4 7.1 15 0.5 9.4 3.5 12.5 10.1 0.4
7 11 0.2 10.4 0.3 9.1 0.4 11.2 0.4 12 0.5 7.9 0.3 8.9 7.9 0.4
8 10 0.2 9.3 0.3 8.6 0.4 10.0 0.4 10 0.5 7.3 0.3 7.8 6.8 0.4
9 10 0.2 8.8 0.3 8.4 0.4 9.8 0.4 6.5 0.5
10 8.4 0.3

Most recent temperature and dissolved oxygen profile plots

Temperature (°C), Dissolved Oxygen (mg/L)