Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
FALMOUTH CUMBERLAND 5 1 0.7 flushes/yr
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

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

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2016-08-28
2016-09-03
2016-09-24
2017-08-05
2017-08-13
2017-08-19
2017-09-02
2017-09-17
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 25.7 7.9 23.8 7.4 20.9 8.0 25.5 8.7 25.0 8.4 24.4 7.7 20.7 7.4 22.8 8.8
1 25.6 7.9 23.8 7.4 21.0 7.9 25.5 8.7 25.0 8.4 24.3 7.7 20.7 7.4 22.4 8.9
2 25.5 7.8 23.8 7.4 21.1 7.9 25.4 8.7 24.5 8.4 23.6 7.7 20.7 7.3 22.3 8.9
3 25.4 7.6 23.8 7.3 21.2 7.8 25.4 8.7 24.3 8.1 23.1 7.7 20.7 7.2 21.9 8.7
4 25.0 6.8 23.7 7.3 21.2 7.8 25.3 8.6 24.1 8.1 23.0 7.5 20.7 7.2 20.7 8.5
5 24.6 6.3 23.7 7.1 21.2 7.8 22.7 6.6 24.0 8.1 22.9 7.3 20.6 7.2 20.4 8.2
6 24.3 5.7 23.7 7.2 21.2 7.8 19.5 2.9 21.7 2.1 22.5 4.6 20.6 7.3 20.2 7.7
7 23.6 4.0 23.4 6.3 21.2 7.7 17.5 2.0 18.2 0.9 19.4 0.7 20.3 6.9 20.0 7.0
8 20.5 0.3 21.9 1.7 20.7 7.1 15.4 1.4 15.4 0.8 15.9 0.4 18.2 2.1 19.5 6.1
9 17.5 0.2 18.9 0.4 20.1 4.0 13.6 1.8 13.6 1.5 14.4 0.8 15.4 0.7 16.5 0.7
10 14.1 0.6 14.4 0.4 15.0 0.5 11.7 2.8 12.0 2.3 12.4 1.8 12.7 1.2 12.5 0.5
11 12.2 1.1 12.8 0.7 12.8 0.4 10.9 3.1 10.5 2.9 10.8 2.5 10.7 1.8 10.8 0.6
12 11.5 1.2 11.4 1.1 11.4 0.3 9.8 3.6 10.0 2.8 10.2 2.6 10.1 2.0 10.0 1.0
13 10.6 1.4 10.4 1.1 10.9 0.3 9.3 3.4 9.4 2.9 9.6 2.6 9.7 2.0 9.7 1.0
14 10.3 1.5 10.3 1.1 10.4 0.3 8.9 3.3 9.0 2.9 9.2 2.4 9.2 2.0 9.3 0.8
15 10.1 1.4 10.0 1.0 10.1 0.2 8.6 3.2 8.7 2.6 8.8 2.4 8.9 1.9 9.0 0.7
16 9.9 1.2 9.8 0.5 9.9 0.2 8.4 3.0 8.4 1.9 8.6 2.2 8.7 1.6 8.7 0.2
17 9.8 1.1 9.6 0.4 9.8 0.2 8.3 2.7 8.2 1.5 8.4 1.6 8.5 1.3 8.7 0.1
18 9.6 0.7 9.5 0.2 9.7 0.2 8.2 2.2 8.2 1.2 8.3 1.3 8.4 0.7 8.5 0.1
19 9.5 0.5 9.5 0.1 9.6 0.2 8.1 1.7 8.2 0.9 8.3 0.4 8.5 0.1
20 9.4 0.1 9.5 0.2 8.1 0.9 8.2 0.8 8.3 0.3 8.4 0.1

Recent temperature and dissolved oxygen profile plots

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