Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
CASCO CUMBERLAND 5 1 0.2 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
21 m
(70 ft) 		14 m
(44 ft) 		41 ha
(101 ac) 		5,550,000 m3
(4,499 ac-ft) 		2 km2
(0.7 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
1974 6.7 34 5.7 7.5 8.5 10.0 6 0.6 1.7 2.7
1975 5.0 24 6.7 6.8 8.8 12.8 8 0.6 2.3 3.9
1976 7.5 5.9 7.4 9.4 8 1.2 2.5 4.5
1977 7.0 7.0 7.0 1
1978 66.0 6.5 6.9 7.8 5
1979 14.0 33 5.0 24 6.9 7.6 10.0 6 1.2 1.2 1.2
1980 6.0 41 7.5 19 5.7 7.4 9.8 6 0.7 1.4 1.9
1981 5.0 6.8 9.5 6
1982 5.8 6.8 7.6 6
1983 7.0 7.0 13 7.0 8.1 8.9 6 1.5 1.5 1.5
1985 7.5 8.3 9.5 5
1986 5.0 33 4.0 18 7.0 7.5 8.4 3
1987 6.5 7.4 8.5 3
1991 6.5 41 6.8 5.0 5 7.6 8.1 8.5 2 1.0 1.3 1.6
1995 6.0 7.8 9.5 4
1998 9.6 9.8 9.9 1
1999 7.3 54 3.5 13 7.6 10.1 13.8 6 1.1 1.2 1.4
2000 8.2 10.5 14.0 5
2001 8.4 9.4 9.9 4
2002 7.7 9.6 10.5 4
2003 8.3 9.3 10.5 3
2004 3 10.0 63 7.2 5.0 12 7.6 9.2 10.3 4 1.2 1.2 1.2
2005 7.9 8.6 9.6 4
2006 4.0 8.1 9.5 11.1 4
2007 7.9 8.9 9.9 4
2008 4 6.2 56 7.1 3.0 23 6.3 8.3 10.6 4 0.7 0.7 0.7
2009 9.5 9.6 9.7 1
2010 8.0 9.2 10.5 3
2015 7.0 7.9 8.8 3
2016 8.3 9.0 9.6 2
2017 4 9.0 63 7.2 5.0 9.7 9.7 9.7 1 1.6 1.6 1.6

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
3.7 7.5 44 7 11 5.5 16 5 8.5 14 4.1 0.6 1.5 4.5

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1979-09-25
1980-09-24
1986-09-18
1991-09-19
1999-08-25
2004-08-11
2008-08-27
2017-09-13
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 17.1 9.6 18 9.4 17.9 9.3 20.5 9.4 24.0 8.9 23.5 8.4 22.3 8.1 21.2 9.0
1 17.9 9.3 20.6 9.4 23.9 9.1 23.5 8.3 22.3 8.2 20.9 9.0
2 17.0 9.4 18 9.1 17.8 9.4 20.6 9.4 23.6 9.1 23.5 8.1 22.2 8.1 20.6 9.0
3 17.8 9.4 20.5 9.4 23.1 9.1 23.5 8.3 22.1 8.1 20.5 9.0
4 17.0 9.3 18 9.1 17.6 9.4 20.5 9.4 23.0 9.0 23.5 8.4 22.1 8.1 20.5 9.0
5 17.5 9.4 22.9 9.1 23.5 8.3 22.1 8.1 20.4 9.0
6 17.0 9.3 18 9.1 17.3 9.4 20.5 9.4 22.7 9.2 23.2 8.5 21.6 8.3 20.3 9.0
7 17.3 9.4 22.6 9.2 19.6 12.0 17.4 12.2 20.2 8.9
8 17.0 9.2 18 9.1 17.3 9.4 20.2 9.3 20.6 12.5 16.0 13.3 13.8 12.6 18.1 12.1
9 17.0 9.2 17.2 9.3 16.4 13.8 16.6 13.4 13.2 13.5 11.1 12.3 14.9 12.6
10 11.8 11.3 18 9.1 15.0 10.1 12.9 13.6 13.6 13.9 11.3 14.1 9.4 11.0 11.9 12.2
11 12 12.5 11.2 10.2 10.9 12.6 11.9 13.2 10.0 13.3 8.1 6.3 10.4 11.1
12 8.0 9.5 10 12.6 9.6 9.2 10.1 11.4 10.8 11.5 9.2 11.5 7.1 4.2 9.0 8.3
13 8.9 7.6 8.5 5.1 9.9 10.7 7.9 6.7 6.7 3.2 8.1 5.5
14 7.0 6.5 7.8 3.9 8.2 3.4 8.9 6.4 7.5 3.4 6.3 1.2 7.4 3.4
15 10 5.0 7.2 1.8 8.0 1.6 8.3 1.5 7.3 1.7 6.1 0.4 7.1 1.0
16 6.5 3.2 7.1 1.3 8.0 0.4 7.1 0.8 5.9 0.3
17 8 3.5 7.0 1.1 7.5 0.3 8.0 0.3 7.1 0.4 5.8 0.3 6.9 0.7
18 6.5 3.1 6.9 1.0 8.0 0.2 5.8 0.2
19 8 1.0 6.9 0.8 7.2 0.2 5.8 0.2 6.8 0.7
20 6.1 0.7 7.2 0.2

Recent temperature and dissolved oxygen profile plots

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