Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
FALMOUTH CUMBERLAND 5 1 0.7 flushes/yr 190 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
20 m
(67 ft)
7 m
(23 ft)
252 ha
(622 ac)
17,300,000 m3
(14,025 ac-ft)
19 km2
(7.2 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
1974 8.8 4.0 5.4 7.4 6 1.3 2.2 3.3
1975 5.5 34 6.9 4.8 6.2 8.1 7 2.0 2.8 4.4
1976 4.7 26 8.8 4.0 6.3 8.4 9 1.0 2.7 5.5
1977 2 4.5 7.4 9.1 3
1978 4.3 6.8 8.5 5
1979 6.1 7.1 8.2 3
1980 7.0 55 6.0 16 5.2 6.4 8.7 4 2.2 2.2 2.2
1981 5.5 6.8 7.6 5
1982 5.3 5.9 6.8 5
1983 6.0 8.0 11 5.1 5.1 5.1 1 4.1 4.1 4.1
1985 6.1 6.9 7.3 5
1986 6.0 36 2.0 7 5.2 6.0 7.3 6 2.3 2.3 2.3
1987 3.4 5.1 7.0 5
1988 7.4 4.6 5.6 6.5 7 3.1 3.8 4.6
1989 2.7 4.0 4.9 5
1990 4.0 5.0 5.5 6
1991 16.0 75 6.9 11.5 2.1 4.4 7.5 9 2.8 2.8 2.8
1992 8.0 20 6.6 8.6 3.6 5.2 6.5 6 3.3 4.0 4.7
1993 4.5 7.0 10.0 5
1994 7.0 8.0 8.0 4.4 5.7 6.9 5 2.4 2.4 2.4
1995 6.9 3.4 4.9 5.8 6
1996 2.0 4.5 6.5 7 1
1997 13.0 3.1 4.4 5.5 8 5.7 5.7 5.7
1998 8.0 58 7.0 9.5 11 3.3 4.2 5.2 7 4.7 6.3 8.0
1999 4.3 5.3 6.3 6
2000 7.1 6.5 3.3 4.7 5.8 8
2001 8.2 6.2 3.7 5.0 6.4 11
2002 10.7 13 12.6 4.5 5.4 6.2 12 3.0 3.9 4.6
2003 8 9.0 78 8.0 3.9 5.1 6.2 7 8.6 8.6 8.6
2004 4.0 5.0 5.5 7
2005 11 7.0 75 6.9 10.0 13 3.3 4.5 5.2 7 6.6 6.6 6.6
2006 2.7 4.6 5.7 7
2007 3.8 4.6 6.8 5
2008 4.6 5.3 5.9 5
2009 10.0 3.9 4.7 5.6 5 7.4 7.4 7.4
2010 10.0 16 3.9 4.9 5.8 7 4.7 4.7 4.7
2011 4.5 4.9 5.6 5
2012 3.7 4.3 5.9 6
2013 2.5 4.6 6.4 12
2014 8 10.0 71 7.1 12.0 1.7 4.6 7.2 10 4.0 4.0 4.0
2015 1.7 4.5 7.0 12
2016 10 10.0 76 7.0 14.0 25 1.9 5.6 8.0 13 4.5 4.5 4.5
2017 2.1 4.9 7.3 11
2018 3.1 5.8 8.4 10

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
9.2 8 55 6.7 9.9 6.4 13 10 1.7 5.3 10 6.8 1 4.3 8.6

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2016-08-17
2016-08-21
2016-08-28
2016-09-03
2017-08-05
2017-08-13
2017-08-19
2017-09-02
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 25.1 7.4 25.2 7.6 25.7 7.9 23.8 7.4 25.5 8.7 25.0 8.4 24.4 7.7 20.7 7.4
1 25.1 7.4 25.3 7.5 25.6 7.9 23.8 7.4 25.5 8.7 25.0 8.4 24.3 7.7 20.7 7.4
2 25.2 7.4 25.2 7.5 25.5 7.8 23.8 7.4 25.4 8.7 24.5 8.4 23.6 7.7 20.7 7.3
3 25.2 7.4 25.2 7.5 25.4 7.6 23.8 7.3 25.4 8.7 24.3 8.1 23.1 7.7 20.7 7.2
4 25.1 7.4 25.2 7.4 25.0 6.8 23.7 7.3 25.3 8.6 24.1 8.1 23.0 7.5 20.7 7.2
5 25.1 7.3 25.0 7.0 24.6 6.3 23.7 7.1 22.7 6.6 24.0 8.1 22.9 7.3 20.6 7.2
6 25.1 7.2 24.0 3.7 24.3 5.7 23.7 7.2 19.5 2.9 21.7 2.1 22.5 4.6 20.6 7.3
7 24.8 6.5 22.9 1.8 23.6 4.0 23.4 6.3 17.5 2.0 18.2 0.9 19.4 0.7 20.3 6.9
8 19.1 0.7 19.8 0.2 20.5 0.3 21.9 1.7 15.4 1.4 15.4 0.8 15.9 0.4 18.2 2.1
9 16.7 0.6 16.5 0.3 17.5 0.2 18.9 0.4 13.6 1.8 13.6 1.5 14.4 0.8 15.4 0.7
10 14.4 1.3 13.7 1.1 14.1 0.6 14.4 0.4 11.7 2.8 12.0 2.3 12.4 1.8 12.7 1.2
11 12.1 2.2 12.4 1.6 12.2 1.1 12.8 0.7 10.9 3.1 10.5 2.9 10.8 2.5 10.7 1.8
12 10.8 2.4 11.2 1.9 11.5 1.2 11.4 1.1 9.8 3.6 10.0 2.8 10.2 2.6 10.1 2.0
13 10.2 2.8 10.5 2.0 10.6 1.4 10.4 1.1 9.3 3.4 9.4 2.9 9.6 2.6 9.7 2.0
14 9.9 2.5 10.2 1.8 10.3 1.5 10.3 1.1 8.9 3.3 9.0 2.9 9.2 2.4 9.2 2.0
15 9.7 2.4 9.8 1.7 10.1 1.4 10.0 1.0 8.6 3.2 8.7 2.6 8.8 2.4 8.9 1.9
16 9.7 1.5 9.9 1.2 9.8 0.5 8.4 3.0 8.4 1.9 8.6 2.2 8.7 1.6
17 9.4 1.5 9.6 1.3 9.8 1.1 9.6 0.4 8.3 2.7 8.2 1.5 8.4 1.6 8.5 1.3
18 9.3 1.2 9.5 1.1 9.6 0.7 9.5 0.2 8.2 2.2 8.2 1.2 8.3 1.3 8.4 0.7
19 9.4 0.7 9.5 0.5 9.5 0.1 8.1 1.7 8.2 0.9 8.3 0.4
20 9.4 0.1 8.1 0.9 8.2 0.8 8.3 0.3

Most recent temperature and dissolved oxygen profile plots

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