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
1976 6.0 6.1 6.8 7.3 4 1.0 1.6 3.0
1977 8.5 46 5.0 4.7 5.0 6.1 7.0 3 1.9 1.9 1.9
1978 10.0 8.0 8.0 5.0 5.8 6.5 4
1979 5.0 6.4 10.5 5
1980 1.0 5.0 6.2 7.5 2
1981 10.0 45 8.0 17.0 5.5 8.0 12.0 4 2.5 2.5 2.5
1982 4.4 6.6 10.0 2
1983 3.2 5.2 7.4 3
1984 5.8 6.0 10.0 3.7 4.9 6.0 3 2.5 2.5 2.5
1985 5.9 6.4 6.7 2
1986 4.6 4.6 4.6 1
1987 8.0 4.6 5.5 6.5 3
1988 10.3 10.9 15.5 4.5 5.8 8.0 7 2.3 2.9 3.4
1989 7.3 3.5 5.2 7.8 5 1.4 2.7 4.2
1990 8.5 6.4 4.1 5.5 7.0 6
1991 5.0 9.7 5.0 5.6 6.2 6 0.6 1.2 1.8
1992 7.0 4.5 6.0 7.3 5 3.5 3.5 3.5
1993 11.5 6.9 7.9 5.2 5.9 7.0 6
1994 7.2 6.8 5.3 6.3 6.8 6
1995 9.9 7.0 8.0 7.5 14.2 5.5 6.4 8.0 7
1996 9.0 6.7 7.4 4.0 5.8 7.1 5 3.6 3.6 3.6
1997 7.0 6.1 6.4 7.1 5 2.1 3.7 5.2
1998 7.8 6.3 6.0 6.8 5.0 5.6 6.2 3 2.1 2.1 2.1
1999 7.5 6.5 6.3 4.5 6.2 5.1 6.3 7.9 5 1.9 2.7 3.2
2000 15 7.5 54 6.6 7.1 9.0 5.0 6.4 7.4 5 2.8 4.3 8.7
2001 15 8.5 54 6.8 7.2 8.3 4.9 6.7 7.8 5 2.0 2.7 4.2
2002 11 8.6 67 6.8 7.2 10.0 5.3 6.4 7.6 7 2.3 2.9 3.4
2003 12 8.6 55 6.6 7.9 8.4 5.6 6.5 7.6 5 1.6 2.5 2.9
2004 22 8.5 43 6.7 6.7 10.5 5.0 6.2 6.9 6 1.0 2.7 3.7
2005 16 7.9 42 6.7 6.8 8.0 4.7 5.8 7.4 5 1.9 2.9 4.3
2006 16 7.9 41 6.8 8.1 9.5 4.6 5.6 6.3 5 2.0 3.0 3.8
2007 12 7.8 37 6.7 9.4 8.2 5.0 5.9 6.8 5 3.0 3.4 4.1
2008 11 7.6 38 6.7 6.5 7.5 5.6 6.3 7.4 6 2.2 3.0 4.0
2009 13 8.8 33 6.7 7.1 8.3 5.0 5.7 6.3 5 1.7 2.7 4.3
2010 11 10.3 36 6.8 6.8 8.7 5.0 6.5 7.5 8 1.8 2.6 3.6
2011 14 8.9 33 6.7 8.1 7.0 7.0 4.4 6.4 8.0 7 2.1 3.1 6.0
2012 15 7.5 38 6.7 7.5 8.8 4.7 5.9 6.9 7 2.7 3.0 4.6
2013 17 8.2 40 6.6 8.4 7.4 5.6 6.0 6.7 7 1.4 2.9 4.6
2014 29 7.6 48 6.7 6.7 6.8 5.0 6.1 7.4 7 2.9 3.2 3.8
2015 23 8.8 48 6.7 6.9 8.2 5.3 6.7 8.2 7 2.9 4.2 5.5
2016 25 8.4 48 6.8 6.6 7.0 5.9 6.9 7.8 7 1.6 2.5 4.9
2017 27 8.4 47 6.7 7.9 5.8 5.3 6.0 7.0 6 1.9 2.7 3.5
2018 24 8.4 49 6.7 6.1 7.8 4.0 6.1 7.5 7 2.0 2.2 3.0

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 8.6 45 6.7 7 10 7.9 3.2 6.1 12 5.1 0.6 2.8 8.7

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 7.9 23 8.0 25 8.4 25 8.1 20 7.6 29 8.2 25 7.8 25 8.1
1 24 7.9 23 8.0 25 8.3 25 8.1 20 7.6 28 8.2 25 7.8 25 8.1
2 24 7.9 23 7.9 25 8.3 25 8.1 20 7.6 28 8.2 25 7.8 25 8.0
3 24 7.9 23 7.9 24 8.2 24 8.1 20 7.6 27 8.2 25 7.7 25 8.0
4 24 7.9 23 7.9 24 8.1 24 8.0 20 7.6 27 8.3 25 7.7 25 8.0
5 24 7.8 23 7.9 24 7.3 24 7.7 20 7.6 26 8.1 25 7.7 25 7.9
6 24 7.8 23 7.9 21 5.2 24 7.2 20 7.5 25 6.9 25 7.7 25 7.9
7 24 7.8 23 7.8 19 4.6 20 4.1 20 7.4 24 6.1 25 7.6 25 7.8
8 24 7.7 23 7.5 17 4.6 17 3.4 19 6.8 22 5.1 23 4.1 23 5.8
9 20 3.5 22 5.1 15 4.6 15 3.6 18 5.1 19 3.5 19 2.4 20 2.5
10 18 2.1 18 1.3 14 5.3 14 3.5 16 1.9 16 3.2 16 1.8 18 1.4
11 16 1.7 16 0.8 13 5.4 13 3.9 14 1.9 15 3.2 15 1.6 16 1.0
12 15 1.3 15 0.8 12 5.2 12 3.7 13 1.9 14 3.0 14 1.8 14 0.8
13 14 0.9 14 0.5 12 4.7 12 3.4 12 1.6 14 2.5 13 1.5 14 0.6
14 13 0.9 14 0.4 12 4.7 12 3.3 12 1.4 13 2.4 13 1.3 13 0.4
15 13 0.4 13 0.3 11 4.5 11 2.8 12 1.0 12 2.0 12 0.8 13 0.3
16 13 0.4 13 0.3 11 3.8 11 2.1 12 0.8 12 1.1 12 0.7 13 0.2
17 11 3.2 12 0.6

Most recent temperature and dissolved oxygen profile plots

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