Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
BRIDGTON CUMBERLAND 4 1 0.82 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
9 m
(29 ft) 		5 m
(17 ft) 		183 ha
(452 ac) 		9,734,824 m3
(7,892 ac-ft) 		13 km2
(5.1 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
1972 3.5 3.8 4.3 3
1976 8.0 4.6 5.5 6.4 4 1.3 2.0 2.5
1977 6.0 33 6.0 4 4.0 3.6 4.2 4.8 2 3.7 3.7 3.7
1978 10.0 4.0 4.0 4.0 1
1979 4.5 4.5 4.5 1
1980 4.0 4.6 6.0 5 3
1981 5.0 25 10.0 3.5 4.9 5.5 6 2.8 2.8 2.8
1982 5.0 50 6.0 3.0 3.8 4.5 6 2.0 2.8 4.1
1983 2.5 4.2 6.0 6 1
1984 3.0 3.9 4.8 7
1985 4.0 4.5 5.5 8
1986 2.5 4.0 5.5 7
1987 5.0 5.2 5.4 2
1988 7.0 35.2 3.0 3.9 5.0 6 3.6 6.2 8.9
1989 3.8 4.4 5.0 7
1990 4.2 6.3 8.2 4.0 4.6 6.2 7
1991 6.5 6.0 4.0 4.8 6.3 6 3 1.4 2.4 3.9
1992 6.5 3.5 4.8 6.5 7 3.2 3.2 3.2
1993 13.0 6.8 5.6 4.0 5.0 6.5 6
1994 13.0 6.8 4.0 4.9 5.5 6
1995 6.0 6.8 6.5 7.7 4.4 5.5 6.5 6 1
1996 8.0 6.4 6.8 3.6 4.8 6.0 6 4.8 4.8 4.8
1997 7.1 4.0 4.8 6.9 7 2 2.2 2.3 2.3
1998 5.8 6.1 8.5 7.1 3.4 4.6 5.4 9 2.7 5.1 7.4
1999 4.3 23 6.5 6.3 5.2 4.8 5.9 7.5 8 7 1.3 2.0 3.0
2000 28 2.6 33 6.3 8.9 4.0 4.8 5.8 9 2.3 3.6 7.0
2001 20 5.3 30 6.7 6.1 4.5 5.4 6.4 6 1.8 2.7 3.5
2002 23 6.0 36 6.8 8.0 3.9 5.2 6.3 8 2.5 3.6 6.4
2003 29 4.8 26 6.6 8.1 4.6 5.4 6.1 5 2.5 3.7 9.3
2004 23 5.2 25 6.7 8.4 3.5 4.7 5.6 8 1.5 3.8 10.6
2005 30 5.5 22 6.6 7.5 8.0 3.9 4.6 5.3 6 2.4 3.1 3.9
2006 36 4.4 23 6.5 7.8 3.9 4.4 5.4 7 1.6 3.0 5.3
2007 19 5.3 21 6.5 8.4 4.3 5.2 5.9 5 2.4 3.2 4.1
2008 25 5.3 21 6.7 7.6 3.7 4.9 5.6 5 2.1 3.2 3.9
2009 32 6.9 19 6.4 9.8 11.0 3.7 4.3 5.7 7 1.6 2.8 4.1
2010 22 8.3 20 6.6 8.0 4.3 5.2 5.8 8 2.3 2.8 4.1
2011 29 6.7 19 6.6 8.3 4.2 4.8 5.6 6 1.7 2.2 3.0
2012 35 5.1 22 6.5 8.5 16.0 3.0 4.3 5.4 7 2.5 3.2 4.1
2013 37 4.4 20 6.5 8.8 18.0 2.7 4.8 6.2 8 2.5 3.0 3.8
2014 57 4.4 22 6.4 8.4 12.0 4.2 4.7 5.7 5 1.6 2.7 3.8
2015 46 5.3 24 6.8 7.7 9.5 4.5 5.1 5.8 5 2.5 3.5 5.3
2016 43 5.3 25 6.8 7.2 16.0 4.9 5.4 5.8 7 2.9 3.3 3.8
2017 41 5.8 25 6.8 8.4 10.0 4.0 4.9 5.6 8 1.9 2.5 3.5

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
32 5.9 26 6.5 9.1 4 12 6.7 2.5 4.7 7.5 6 1.3 3.2 11

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2015-09-02
2016-08-01
2016-08-16
2016-09-02
2017-08-02
2017-08-17
2017-09-06
2017-09-08
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 25 7.9 26 8.0 26 8.0 23 7.8 25 7.9 24 7.8 20 8.3 20 8.4
1 25 7.9 26 8.0 25 7.9 23 7.8 25 7.9 24 7.8 20 8.3 20 8.3
2 25 7.9 26 7.9 25 7.9 23 7.8 25 7.9 24 7.8 20 8.3 20 8.3
3 25 7.9 26 7.8 25 7.8 23 7.7 24 7.7 24 7.9 20 8.2 20 8.3
4 24 6.4 25 7.3 25 7.7 23 7.7 22 5.8 23 7.9 20 7.9 20 8.1
5 22 3.0 22 4.3 22 3.6 23 7.6 18 2.8 20 2.9 19 7.7 19 7.3
6 20 0.1 19 1.4 20 0.5 23 6.2 15 1.3 17 0.7 19 7.5 19 6.6
7 18 0.1 18 0.4 19 0.4 22 2.0 14 0.6 15 0.3 18 5.4
8 18 2.8

Recent temperature and dissolved oxygen profile plots

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