Processing math: 100%

Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
WINTHROP KENNEBEC 12 1 1.07 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
30 m
(100 ft) 		7 m
(24 ft) 		2,119 ha
(5,236 ac) 		157,109,008 m3
(127,370 ac-ft) 		84 km2
(32 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 (μS/cm), pH: pH (standard units)

TP = Total Phosphorus (μg/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 (μg/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
1975 18 4.3 4.3 4.3 1
1976 16.6 1.6 4.0 8.2 7 1.7 6.4 14.5
1977 13.8 17 19 1.5 3.4 5.2 7 1.8 9.2 20.0
1978 2.1 3.7 5.2 8 1.9 8.8 14.4
1979 28 1.1 3.8 5.3 9 2.7 11.7 37.9
1980 39 1.1 4.6 6.9 9 2.9 10.3 34.7
1981 26 1.0 3.6 6.3 9 2.1 8.6 20.3
1982 17.0 22 3.7 4.5 5.9 9 2.9 4.2 6.2
1983 27 1.5 3.6 6.1 8 3.9 8.0 17.8
1984 49 35 2.1 3.8 5.6 6 3.7 8.2 13.2
1985 48 26 2.0 4.4 7.5 7 2.6 8.8 12.3
1986 33 2.5 4.1 5.6 7 4.0 7.7 11.5
1987 16 24 2.0 3.4 4.6 6 2.9 5.4 9.5
1988 23 2.1 3.9 6.5 6 2.6 9.2 16.0
1989 2.5 4.3 5.5 5
1990 18 55 7.1 24.0 28 1.6 3.6 5.9 6
1991 18 7.2 30 2.0 3.6 5.5 5
1992 18 7.1 1.5 2.6 3.8 6
1993 19 7.0 38 1.8 2.7 4.5 6
1994 17 6.9 37 1.9 3.2 5.6 7 6.7 10.9 19.7
1995 16 6.9 15 2.4 4.4 6.8 6
1996 20 1.8 3.6 5.2 6 4.2 7.2 10.0
1997 18 6.9 16 2.5 4.0 6.3 10 5.0 8.3 13.2
1998 20 2.4 4.4 5.8 8 3.9 8.9 14.0
1999 18 2.4 3.7 6.7 11 4.4 10.8 18.9
2000 16 7.0 18 2.7 4.3 6.4 7 4.0 7.3 14.0
2001 15 7.0 15.0 15 2.6 4.3 6.8 6 3.4 9.2 13.8
2002 14 7.0 20 2.6 4.8 7.4 6 4.5 7.7 15.9
2003 18 7.1 28 2.8 4.5 5.6 8 5.5 7.7 10.3
2004 16 7.0 34 2.6 4.9 6.8 5 2.9 6.9 11.4
2005 12 6.9 28 2.2 3.6 5.6 6 4.5 8.2 13.9
2006 10 19 82 7.0 28 2.5 4.3 6.9 7 3.7 7.3 12.0
2007 20 7.0 16.0 35 2.4 4.2 5.7 7 3.6 6.8 12.0
2008 20 7.1 27 2.5 3.9 6.2 6 3.9 9.9 17.0
2009 21 21 1.9 3.6 4.7 8 6.9 9.5 14.0
2010 20 15.0 33 2.1 4.8 7.5 8 3.9 8.3 16.0
2011 20 13.0 130 16 2.6 3.9 6.4 7 2.5 7.0 10.0
2012 21 25 3.3 5.4 7.0 10 3.1 8.0 12.0
2013 22 14.0 51 36 1.9 4.4 7.9 8 2.7 7.6 12.0
2014 20 15.8 52 51 3.2 5.3 7.4 9 4.9 9.1 14.0
2015 21 16.2 12 91 45 2.2 4.3 6.9 8 5.9 9.6 15.0
2016 21 8.8 113 57 4.4 6.5 8.3 10 2.2 3.1 4.2
2017 21 14.8 79 49 2.8 5.5 7.3 8 3.1 6.6 12.0

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
10 18 58 7 15 15 76 29 1 4.1 8.3 7.2 1.7 8.1 38

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2015-08-25
2015-09-24
2016-08-11
2016-08-24
2016-09-07
2016-09-21
2017-08-10
2017-09-07
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 25.4 8.6 22.0 9.3 25.7 7.7 24.6 8.2 23.6 8.2 22.7 8.9 24.9 8.5 20.3 10.0
1 25.5 8.6 22.0 9.2 24.8 7.9 24.4 8.2 23.6 8.1 22.7 9.0 24.9 8.4 20.2 10.0
2 25.5 8.6 21.9 9.4 24.7 7.7 24.2 8.2 23.5 8.1 22.6 9.0 24.9 8.4 20.2 10.0
3 25.5 8.6 21.8 9.4 24.6 7.7 24.1 8.2 23.3 8.1 22.5 9.0 24.8 8.4 20.1 10.0
4 25.2 8.6 21.7 8.9 24.5 7.9 24.0 8.2 23.1 8.1 22.1 8.9 24.7 8.4 20.1 10.0
5 25.0 8.7 21.4 8.0 24.5 7.8 23.9 8.2 23.1 8.1 21.9 8.7 24.1 8.5 20.1 9.9
6 24.3 8.1 20.8 5.6 24.5 7.8 23.9 8.1 23.0 7.9 21.8 8.6 24.0 8.3 20.0 9.9
7 21.3 4.0 19.8 1.8 23.8 7.4 23.8 8.1 22.9 7.9 21.8 8.5 23.8 8.2 20.0 9.8
8 20.0 2.1 17.1 0.4 17.7 3.1 21.4 4.0 22.8 7.6 21.3 7.5 18.6 3.6 19.7 9.2
9 16.9 0.4 15.5 0.3 15.9 1.6 16.5 0.5 19.9 0.7 19.4 3.8 15.7 2.2 18.0 4.6
10 14.7 0.4 14.5 0.3 14.7 0.9 15.3 0.5 16.0 0.4 16.1 0.6 14.4 1.4 15.7 0.2
11 13.5 0.4 13.6 0.3 13.9 0.8 14.1 0.6 14.2 0.4 14.8 0.5 13.4 1.1 13.8 0.2
12 12.8 0.4 13.1 0.3 13.1 0.6 13.6 0.5 13.5 0.4 13.9 0.5 12.7 1.5 13.1 0.2
13 12.1 0.5 12.6 0.3 12.6 0.7 12.8 0.5 13.2 0.4 13.3 0.5 12.1 1.3 12.5 0.1
14 11.4 0.5 11.8 0.3 11.9 0.5 12.1 0.6 12.3 0.4 12.5 0.6 11.4 0.9 11.8 0.1
15 11.0 0.5 10.9 0.3 11.0 0.5 11.4 0.6 11.5 0.4 11.9 0.6 10.0 0.4 10.3 0.1
16 9.3 0.6 9.8 0.3 9.7 0.5 9.9 0.7 10.0 0.4 10.2 0.6 8.8 0.4 8.6 0.1
17 8.7 0.6 8.6 0.3 9.2 0.6 9.2 0.7 9.2 0.4 9.5 0.6 7.7 0.5 8.0 0.1
18 8.3 0.6 8.3 0.3 8.8 0.6 8.9 0.6 8.9 0.4 8.8 0.7 7.4 0.5 7.7 0.1
19 8.0 0.6 8.1 0.3 8.5 0.6 8.7 0.6 8.7 0.4

Recent temperature and dissolved oxygen profile plots

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