Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
BRIDGTON CUMBERLAND 4 1 0.94 flushes/yr 268 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
18 m
(60 ft) 		8 m
(25 ft) 		2,096 ha
(5,180 ac) 		160,013,184 m3
(129,725 ac-ft) 		138 km2
(53 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
1977 7.3 7.3 7.3 1
1978 6.5 45 5.5 5.5 5.5 1
1979 4.0 5.2 7.1 4
1980 3.8 5.4 6.6 5
1981 5.0 5.6 7.0 6
1983 4.6 5.2 5.8 5
1984 4.0 5.0 6.0 2
1985 5.5 6.1 6.5 4
1986 5.0 5.4 5.5 3
1987 9.0 45 4.0 5.0 5.8 7.8 4
1988 10.5 9.2 9.0 4.5 6.0 8.0 9 2.4 2.4 2.5
1989 6.2 4.0 5.0 7.3 5 0.8 2.2 3.5
1990 9.0 6.6 4.5 5.8 7.0 4
1991 6.0 4.0 3.5 4.9 6.0 10 1.9 1.9 1.9
1992 5.5 3.2 5.5 8.8 5 3.2 3.2 3.2
1993 14.0 7.0 6.0 5.9 4.5 5.7 7.0 5 3.6 3.6 3.6
1994 6.3 6.3 5.0 6.0 7.8 6
1995 10.0 6.9 6.0 7.5 7.4 4.5 7.0 9.5 7
1996 7.0 6.8 6.4 4.0 5.5 6.7 7 3.9 3.9 3.9
1997 6.5 3.9 6.2 7.4 7 2.0 3.4 4.7
1998 7.4 6.2 6.3 7.0 5.1 5.8 6.3 6 1.5 2.6 3.6
1999 7.4 6.5 7.0 6.6 4.8 6.0 7.6 6 1.7 2.3 2.8
2000 13.5 6.3 55 6.6 6.8 9.5 4.8 6.4 7.5 6 2.5 3.9 7.6
2001 14.8 8.1 52 6.8 6.4 8.7 5.4 6.5 8.0 5 2.2 3.0 4.5
2002 9.4 8.2 65 6.8 6.3 5.5 7.0 8.9 8 2.0 2.6 3.3
2003 14.1 8.8 54 6.7 6.8 5.5 7.0 7.8 5 1.7 2.4 3.4
2004 20.8 7.8 41 6.6 6.7 14.0 5.4 6.0 6.8 7 1.3 2.6 3.6
2005 16.8 8.1 42 6.7 7.8 7.2 4.3 5.4 6.8 6 2.1 3.4 6.8
2006 15.5 7.8 41 6.8 6.4 8.5 5.1 5.9 6.5 6 1.7 2.6 3.3
2007 12.1 7.2 37 6.7 6.8 7.3 5.3 6.0 6.9 5 1.7 2.9 3.8
2008 10.7 7.8 37 6.7 5.7 8.0 5.6 6.5 7.8 5 1.9 2.9 4.0
2009 14.7 9.1 34 6.6 6.9 4.5 5.0 6.1 6.8 6 1.4 2.4 4.0
2010 11.0 10.6 34 6.8 7.0 6.3 5.4 6.6 7.4 8 1.7 2.7 3.3
2011 16.2 8.8 34 6.7 8.0 7.7 4.1 6.2 7.7 8 1.8 2.8 6.8
2012 16.6 7.4 36 6.8 5.3 9.7 4.6 6.1 7.1 6 2.3 2.9 4.5
2013 15.4 8.1 39 6.6 6.9 6.0 5.4 6.2 6.9 6 1.6 2.9 3.8
2014 30.0 7.7 44 6.7 6.8 7.0 5.5 6.4 8.0 6 2.7 3.3 5.3
2015 24.3 8.2 47 6.7 5.5 7.3 6.1 6.9 7.8 6 2.8 3.8 5.3
2016 24.6 8.6 48 6.8 6.2 6.0 5.8 7.2 8.0 7 1 1.8 2.4 4.8
2017 25.9 8.1 48 6.6 7.1 6.2 5.1 6.2 6.8 6 1.9 2.8 4.4
2018 24.1 8.2 49 6.7 5.8 9.0 4.0 6.4 8.1 7 2.0 2.7 4.0

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
17 8.4 44 6.7 6.5 8.8 7 3.2 6 9.5 5.6 0.8 2.9 7.6

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2016-08-30
2016-09-13
2017-08-01
2017-08-15
2017-09-12
2018-08-07
2018-08-21
2018-09-07
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 24 7.7 23 8.1 25 8.3 24 8.2 20 7.4 28 8.2 25 7.8 25 8.0
1 24 7.7 23 8.0 25 8.3 24 8.2 20 7.4 28 8.2 25 7.7 25 7.9
2 24 7.7 23 8.0 25 8.3 24 8.1 20 7.4 27 8.2 25 7.7 25 7.9
3 24 7.6 23 7.9 24 8.3 24 7.8 20 7.4 27 8.2 25 7.7 25 7.9
4 24 7.6 23 7.9 24 8.2 24 7.8 20 7.4 27 8.2 25 7.7 25 7.9
5 24 7.6 23 7.9 24 7.9 24 7.5 20 7.4 26 8.0 25 7.7 25 7.8
6 24 7.6 23 7.9 22 6.1 23 7.1 20 7.4 25 7.2 25 7.7 25 7.7
7 24 7.6 23 7.9 20 4.7 22 5.6 20 7.4 24 6.3 25 7.2 24 7.1
8 24 7.6 23 7.9 18 4.0 20 3.5 20 7.4 23 5.3 25 6.6 24 6.5
9 24 7.6 23 7.8 17 3.7 18 2.9 20 7.4 22 4.4 22 2.9 24 5.7
10 24 7.6 23 7.8 16 3.6 18 2.7 20 7.4 21 3.8 22 2.6 24 5.3
11 24 7.6 23 7.8 16 3.3 17 2.4 20 7.4 21 3.0 21 2.0 23 4.5
12 24 6.9 23 7.8 16 3.0 17 2.0 20 7.3 20 2.4 21 1.4 23 3.6
13 23 5.6 23 7.6 15 2.4 17 1.9 20 7.3 20 1.8 20 0.6 22 2.7
14 23 4.7 23 7.5 15 2.4 16 1.8 20 7.3 19 1.3 20 0.5 21 1.0
15 23 4.6 23 7.3 15 2.2 16 1.7 20 7.3 19 0.9 20 0.4 21 0.3
16 23 4.5 23 7.1 15 2.2 16 1.6 20 7.3 19 0.7 19 0.3 20 0.3
17 23 3.4 22 6.7 15 2.0 16 1.5 20 7.3 18 0.6 19 0.2

Most recent temperature and dissolved oxygen profile plots

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