Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
BRIDGTON CUMBERLAND 4 1 0.94 flushes/yr
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 8.2 8.2 8.2 1
1978 5.5 5.5 5.5 1
1979 5.0 5.9 6.5 5
1980 5.5 6.2 7.0 3
1981 10.5 10.5 10.5 1
1982 5.2 5.6 6.4 4
1983 3.9 6.0 6.9 6
1984 5.8 5.0 8 4.5 5.5 6.5 7 4.4 4.4 4.4
1985 6.0 7.2 9.5 6
1986 5.3 6.6 7.5 8
1987 9.0 48 5.0 6 5.0 6.2 8.2 6
1988 10.4 13.4 10 5.5 6.7 8.0 6 2.2 2.2 2.2
1989 6.8 3.5 5.6 8.4 4 1.0 2.3 3.0
1990 7.7 6.6 4.5 5.9 7.0 4
1991 6.0 4.5 5.3 6.0 5 2.0 2.0 2.0
1992 5.2 5.0 6.2 8.2 5 2.4 2.4 2.4
1993 9.0 7.0 7.0 6.8 4.7 6.3 7.5 4
1994 8.5 4 5.9 4.5 5.8 7.5 5
1995 9.7 7.0 7.0 7.1 4.5 7.0 9.6 6
1996 7.0 6.8 4.0 9.3 4.4 5.6 6.7 5 3.6 3.6 3.6
1997 5.8 5.4 6.7 7.5 6 2.7 3.3 3.8
1998 7.5 6.2 8.0 7.0 5.5 6.2 7.2 4 2.6 2.6 2.6
1999 7.2 6.6 8.0 6.0 5.3 6.8 7.9 5 2.0 2.4 2.6
2000 14 7.8 53 6.6 6.4 7.7 5.1 6.3 7.2 6 3.0 3.9 7.7
2001 12 9.2 55 6.9 6.2 7 6.0 7.1 7.8 4 2.3 2.8 4.4
2002 10 8.3 66 6.9 6.7 5.7 7.2 8.5 6 1.7 2.6 3.6
2003 13 8.3 53 6.7 5.3 5.4 7.3 8.4 5 1.9 2.4 3.0
2004 20 8.1 41 6.6 6.7 8 5.1 6.2 7.0 7 1.7 2.7 4.0
2005 17 7.9 43 6.7 7.5 6.8 4.7 6.0 7.0 5 2.2 3.3 5.6
2006 14 7.4 40 6.7 7.3 7.0 5.5 6.2 6.8 6 1.8 2.7 3.7
2007 13 7.6 37 6.8 5.5 7.6 5.6 6.3 7.2 6 1.9 2.5 3.2
2008 11 7.9 37 6.7 6.0 6.0 6.0 6.9 8.0 5 2.1 3.1 4.3
2009 13 9.1 38 6.7 6.1 5.6 4.8 5.9 6.6 5 1.6 2.7 3.7
2010 12 10.3 35 6.8 6.3 8.3 5.4 6.7 7.9 6 1.7 2.5 3.5
2011 15 8.6 29 6.7 6.4 6.3 4.8 6.3 8.0 6 1.6 2.5 4.2
2012 16 7.3 38 6.8 5.4 4.5 5.1 6.2 7.4 7 2.3 2.8 4.1
2013 15 7.7 39 6.7 5.8 6.7 5.8 6.7 7.4 6 1.2 2.7 3.5
2014 28 7.5 45 6.6 6.1 6.3 5.4 6.4 7.7 5 2.9 3.7 6.1
2015 24 8.3 48 6.7 6.5 6.8 5.4 6.8 8.3 7 2.4 3.2 4.1
2016 26 8.2 49 6.8 5.9 7.3 6.3 7.1 7.7 5 1.8 2.3 4.2
2017 24 8.1 47 6.6 5.6 5.8 5.6 6.7 7.6 6 2.0 2.9 4.3

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
16 8.2 44 6.7 6.6 7.2 6.6 3.5 6.5 10 5.1 1 2.8 7.7

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2015-09-01
2015-09-16
2016-08-09
2016-08-30
2016-09-13
2017-08-01
2017-08-15
2017-09-12
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 25 7.8 24 8.3 26 8.0 24 8.1 24 8.1 25 8.4 24 8.2 20 7.8
1 25 7.8 24 8.3 25 7.9 24 8.1 23 8.0 25 8.4 24 8.2 20 7.8
2 25 7.8 24 8.3 25 7.9 24 8.0 23 8.0 24 8.3 24 8.2 20 7.8
3 25 7.8 24 8.2 25 7.9 24 7.9 23 8.0 24 8.3 24 8.1 20 7.8
4 25 7.8 23 8.2 25 7.9 24 7.8 23 8.0 24 8.2 24 8.1 20 7.8
5 25 7.8 23 8.2 25 7.9 24 7.7 23 8.0 24 8.1 24 8.0 20 7.8
6 24 7.4 23 8.2 25 7.8 24 7.6 23 7.9 23 7.6 23 7.6 20 7.8
7 24 7.0 23 8.0 25 7.8 24 7.6 23 8.0 19 4.5 21 5.3 20 7.7
8 23 3.9 23 7.9 24 7.4 24 7.6 23 7.9 18 4.2 19 3.4 20 7.7
9 22 2.7 22 1.8 21 4.0 24 7.5 23 7.8 16 4.2 18 3.1 20 7.6
10 20 1.4 20 0.7 20 3.4 24 7.4 23 7.6 15 4.0 16 3.2 20 7.4
11 19 1.1 19 0.4 18 3.2 22 4.4 22 6.8 14 4.6 14 3.2 18 4.8
12 17 0.6 17 0.1 18 3.0 19 1.4 21 4.1 13 4.5 13 2.8 16 2.3
13 16 0.3 16 0.1 17 2.3 18 0.9 18 0.5 13 4.1 13 2.6 14 1.0
14 15 0.1 15 0.1 16 2.1 17 0.6 17 0.4 13 3.9 13 2.2 14 0.8
15 15 0.1 15 0.1 16 1.9 16 0.4 16 0.3 12 3.2 13 2.2 13 0.6
16 15 0.1 15 0.1 16 1.3 16 0.3 16 0.3 12 2.7 13 0.3
17 15 0.1 12 2.3

Recent temperature and dissolved oxygen profile plots

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