Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
BRIDGTON CUMBERLAND 4 1 0.97 flushes/yr 470 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
8 m
(28 ft) 		5 m
(17 ft) 		55 ha
(136 ac) 		2,941,178 m3
(2,384 ac-ft) 		4 km2
(1.7 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
1984 6.0 7.4 8.0 5
1985 3.0 20 7.0 6.8 6.8 6.8 1
1986 5.7 7.0 7.5 3 2
1987 7.0 7.5 8.0 3 1
1988 6.0 8.5 13 7.0 4.0 5.2 7.4 2
1989 3.5 5.8 6.6 4
1990 7.3 6.7 6.0 7.0 7.5 7
1991 4.5 5.5 6.0 6 2.1 2.1 2.1
1992 7.0 5.3 6.4 7.2 5
1993 10.0 6.8 13.0 6.7 6.0 7.3 8.5 5 2 1.5 1.5 1.5
1994 7.0 6.7 8.5 7.5 4.8 6.4 8.5 5
1995 8.0 6.9 7.7 9.5 3.7 5.6 7.6 6
1996 9.2 6.3 6.4 4.4 6.0 7.6 6 1.0 2.5 4.0
1997 5.0 27 7.0 4.0 7.3 5.2 6.7 8.3 8 1.1 2.2 3.0
1998 6.2 6.3 6.0 5.2 6.5 8.3 10 1.5 3.0 4.4
1999 5.0 6.3 5.5 6.2 3.1 6.8 8.3 9 1 3.1 3.1 3.1
2000 10.2 4.4 27 6.6 7.8 5.3 6.5 7.6 8 1.1 2.4 3.1
2001 4.8 6.2 25 6.7 5.7 25.0 6.1 7.6 8.4 5 2 1.0 1.4 1.9
2002 6.9 6.4 30 6.8 7.6 5.9 7.0 8.2 6 1 1.1 2.0 3.8
2003 6.0 6.1 21 6.7 6.8 5.1 7.4 8.1 7 2 0.9 2.1 2.7
2004 14.2 5.6 18 6.7 7.2 6.9 7.4 8.1 10 2 0.9 2.1 3.3
2005 12.9 6.1 18 6.8 6.7 19.0 5.3 6.8 8.0 10 1.2 2.4 3.4
2006 9.8 6.6 18 6.8 11.2 11.0 6.1 7.3 8.2 10 1.3 2.8 4.1
2007 9.0 5.6 18 6.8 6.0 6.8 7.6 8.2 8 2 1.2 1.8 3.2
2008 4.8 6.0 15 6.7 5.7 13.0 6.6 7.7 9.0 8 2 1.3 2.6 3.9
2009 7.1 7.3 16 6.7 6.6 6.6 7.6 8.5 9 2 1.1 2.1 3.3
2010 4.9 7.5 16 6.7 6.8 6.0 7.6 8.6 6 4 0.7 1.7 2.9
2011 10.8 7.6 16 6.8 6.9 13.0 4.2 6.5 7.7 9 0.5 1.9 3.3
2012 9.6 5.8 18 6.8 7.6 5.1 6.7 7.9 6 1.4 2.5 3.3
2013 10.6 5.5 16 6.7 7.6 5.2 6.7 8.1 11 1 1.4 2.9 6.1
2014 16.7 4.8 18 6.7 6.4 5.1 6.6 8.2 12 1.4 3.2 6.9
2015 18.2 5.8 19 6.8 7.0 5.5 6.5 7.8 8 1.2 2.6 3.8
2016 15.8 5.7 18 6.9 7.6 4.3 6.3 7.6 9 1.1 2.1 3.3
2017 14.6 5.8 18 6.8 6.9 5.3 6.7 7.5 12 1.4 2.3 3.9
2018 17.0 5.2 18 6.8 6.8 8.0 4.9 6.6 7.8 11 1.0 1.9 2.0

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
11 6.2 20 6.7 7.3 13 12 7.2 3.1 6.8 9 7.1 0.5 2.3 6.9

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2016-08-02
2016-08-17
2016-09-06
2017-08-14
2017-09-01
2018-08-02
2018-08-16
2018-09-05
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 26 7.5 25 7.5 23 8.2 25 8.4 22 8.8 26 8.3 26 8.3 26 8.3
1 26 7.8 25 7.5 23 8.2 24 8.4 22 8.7 26 8.3 26 8.3 25 8.3
2 26 7.8 25 7.5 23 8.2 24 8.3 22 8.8 26 8.3 26 8.3 25 8.3
3 26 7.7 25 7.5 23 8.2 24 8.3 22 8.7 26 8.2 26 8.3 25 8.2
4 26 7.7 25 7.5 23 8.1 24 8.3 22 8.6 25 8.2 26 8.3 25 8.4
5 26 7.3 25 7.5 23 8.1 24 8.1 22 8.6 24 8.8 25 8.2 24 8.3
6 24 7.2 24 7.2 23 8.0 20 11.9 22 8.5 19 12.8 20 13.1 24 9.3
7 20 10.2 22 6.2 23 6.6 16 11.5 18 10.4 15 12.7 17 13.3 20 13.1
8 18 1.8 20 0.7 22 1.1 14 2.9 16 1.9 15 7.3 17 1.6

Most recent temperature and dissolved oxygen profile plots

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