Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
WINTHROP KENNEBEC 12 1 0.81 flushes/yr 210 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
36 m
(118 ft) 		8 m
(27 ft) 		472 ha
(1,166 ac) 		51,158,452 m3
(41,475 ac-ft) 		23 km2
(8.9 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
1975 4.9 5.8 6.7 3
1976 8.7 4.8 5.6 6.8 7 2.3 3.9 5.8
1978 11.5 5.2 5.7 6.5 4 1.3 1.9 2.6
1979 6.0 5.3 6.4 8.6 6 2.4 3.3 4.1
1980 16.0 5.7 6.2 7.3 4 2.6 4.7 6.8
1981 11.0 10 4.7 5.9 6.7 5 1.7 2.4 3.1
1982 7.5 9 5.9 6.8 8.5 7 1.8 3.2 4.9
1983 6.0 4.5 5.6 6.1 6 2.4 3.7 6.4
1984 5.1 6.1 6.9 5
1985 46 7.8 5.2 6.2 7.5 6 2.4 2.4 2.4
1986 9.0 5.4 6.0 7.0 6
1987 13 13.5 4.7 6.0 6.9 6
1988 6.5 7.2 8.7 4
1989 4.7 5.5 6.5 4
1990 16 7.0 7.7 9.2 5.5 6.4 7.6 6
1991 15 7.0 25 3.0 5.8 7.9 5
1992 15 57 6.8 5.0 5.4 6.0 5 2.9 4.6 5.8
1993 16 6.9 9.5 4.2 6.4 8.3 6 2.2 3.8 6.8
1994 5.4 6.2 7.2 5
1995 17 6.9 8.0 3.3 6.4 7.6 6
1996 3.1 5.1 6.7 6
1997 3.9 5.8 6.9 6
1998 15 6.9 9.8 4.6 5.5 6.5 6 4.0 4.8 7.4
1999 3.8 5.8 8.8 12
2000 4.5 6.0 7.2 6
2001 15 7.0 9.4 5.6 7.2 8.4 6 2.0 5.0 6.7
2002 16 7.0 7.5 6.4 7.2 7.9 6 2.3 3.8 6.0
2003 6.0 7.3 8.8 6
2004 5.5 7.3 8.9 6
2005 12 7.6 5.2 6.1 7.2 5 2.1 4.4 11.3
2006 11 16 77 7.4 8.0 5.2 6.1 7.0 6
2007 5.8 6.8 7.6 6
2008 17 7.0 8.2 4.8 6.2 7.7 6 3.7 5.2 6.6
2009 19 5.1 5.4 5.8 6
2010 5.2 6.3 7.7 6
2011 16 9.6 5.5 6.2 7.0 5 3.1 3.6 3.9
2012 10 18 73 7.6 6.0 6.0 6.7 7.7 7
2013 5.2 6.1 7.1 7
2014 18 8.4 4.2 6.7 7.5 10 3.2 4.9 6.0
2015 5.5 6.8 8.1 8
2016 5.8 7.4 9.4 9
2017 19 8.0 6.0 5.8 6.8 7.7 7 3.1 4.5 5.8
2018 6.3 7.4 8.4 6

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 16 63 7 8.9 7.6 15 3 6.3 9.4 6 1.3 3.9 11

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2015-09-01
2016-08-05
2016-08-18
2016-09-13
2017-08-14
2017-09-05
2018-08-13
2018-09-14
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 25.3 8.4 25.6 8.1 25.2 8.1 22.9 8.1 24.0 8.2 20.0 9.0 25.9 8.1 23.4 8.3
1 24.5 8.5 25.6 8.1 25.1 8.2 22.9 8.0 24.1 8.3 20.0 8.9 25.8 8.1 22.9 8.4
2 24.4 8.6 25.4 8.2 25.0 8.2 22.8 8.0 24.0 8.2 20.0 8.9 25.8 8.1 22.5 8.5
3 24.2 8.6 25.1 8.3 24.8 8.2 22.6 8.1 23.9 8.3 20.0 8.9 25.7 8.1 22.3 8.5
4 24.2 8.6 24.9 8.2 24.4 8.2 22.4 8.1 23.8 8.2 20.0 8.9 25.7 8.1 22.1 8.5
5 24.0 8.6 24.7 8.2 24.3 8.2 22.4 8.0 23.7 8.2 19.9 8.8 25.6 8.0 21.9 8.4
6 23.8 8.6 22.5 8.7 24.2 8.2 22.4 8.0 22.2 8.6 19.7 8.9 24.6 7.9 21.8 8.3
7 19.9 6.6 16.2 8.2 18.2 7.2 22.1 7.8 15.9 6.5 19.5 8.4 18.5 8.1 21.1 8.1
8 15.0 3.8 13.9 7.3 15.1 7.0 16.6 4.9 13.0 6.1 14.2 5.0 13.7 6.8 15.6 6.1
9 12.1 4.1 12.1 7.1 13.1 6.7 13.1 5.2 11.3 6.2 12.1 5.5 11.1 6.2 12.0 4.1
10 10.1 4.6 11.4 7.4 11.6 6.9 12.1 4.8 10.2 6.2 10.7 5.3 9.8 5.7 10.3 3.8
11 9.1 5.7 10.8 7.4 10.6 6.3 11.1 4.6 9.7 6.0 9.9 5.0 8.9 5.9 9.2 4.1
12 8.6 5.6 9.9 6.9 10.2 6.3 10.2 5.2 9.2 6.3 9.6 5.2 8.3 6.0 8.6 3.6
13 8.2 6.9 9.6 7.2 9.5 6.9 9.9 5.2 8.6 6.8 9.0 5.6 7.8 6.6 7.9 5.2
14 7.7 8.3 9.1 7.1 9.0 7.0 8.8 6.5 8.1 7.2 8.6 6.3 7.2 6.6 7.3 6.1
15 7.3 8.1 8.1 7.8 8.4 7.5 8.3 6.5 7.1 7.2 7.6 6.9 6.8 7.1 6.8 5.9
16 7.0 7.9 7.7 8.0 8.1 7.8 7.9 6.4 6.9 7.5 7.2 6.9 6.5 6.9 6.5 5.7
17 6.9 7.7 7.6 8.2 7.9 7.7 7.7 6.4 6.7 7.4 6.8 6.6 6.3 6.6 6.3 5.7
18 6.7 8.1 7.4 8.4 7.6 6.5 6.5 7.6 6.7 6.9 6.2 6.9 6.2 5.8
19 6.6 8.3 7.3 8.3 7.4 8.1 7.4 6.6 6.5 7.3 6.5 7.1 6.0 7.3 6.1 6.0
20 6.6 8.2 7.3 8.3 7.3 6.5 6.4 7.3 6.4 7.2 6.0 7.2 6.0 6.0
21 6.5 7.7 7.3 8.3 7.3 7.6 7.3 6.5 6.4 7.2 6.4 7.1 6.0 7.0 6.0 5.7
22 6.5 7.7 7.2 8.2 7.3 6.4 6.3 6.4 6.4 7.1 5.9 7.1 6.0 5.6
23 6.5 7.8 7.2 8.2 7.2 7.6 7.2 6.3 6.3 7.4 6.3 7.0 5.9 7.1 5.9 5.7
24 6.4 7.8 7.1 8.1 7.2 6.3 6.2 7.2 6.3 6.9 5.8 7.4 5.9 5.6
25 6.4 7.8 7.0 7.7 7.1 7.4 7.1 6.2 6.2 7.1 6.2 6.9 5.7 7.2 5.8 5.4
26 6.3 7.6 7.0 7.4 7.1 6.2 6.1 6.9 6.2 6.9 5.7 6.6 5.8 5.0
27 6.3 7.5 7.0 7.3 7.0 7.3 7.0 5.6 6.1 6.7 6.1 6.4 5.7 6.1 5.7 5.0
28 6.2 6.7 7.0 7.2 7.0 5.3 6.0 6.7 6.1 6.4 5.6 5.9 5.7 4.6
29 6.2 6.2 7.0 7.1 7.0 6.6 7.0 5.4 6.0 6.6 6.1 6.2 5.6 5.6 5.7 4.6
30 6.2 5.4 6.9 6.7 6.9 6.2 6.9 4.4 6.0 6.3 6.0 5.3 5.6 4.9 5.6 3.4
31
32
33
34
35 6.1 3.5 6.9 6.2 6.9 5.2 6.9 3.0 6.0 5.7 6.0 3.9 5.6 3.6 5.6 1.7

Most recent temperature and dissolved oxygen profile plots

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