Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
SEBAGO CUMBERLAND 4 1 0.15 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
96 m
(316 ft)
33 m
(109 ft)
11,944 ha
(29,514 ac)
3,977,000,000 m3
(3,224,206 ac-ft)
458 km2
(177 mi2)

Secchi Disk Transparency Graphs

Graph Legend: Secchi symbols = average Secchi Disk Transparency Values; tick marks = maximum and minimum values for each year.

## [1] "No 2017 Secchi Disk Transparency Data"

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
1970 8.1 8.4 8.7 2
1971 9.4 9.6 9.8 2
1972 9.8 10.6 11.3 2
1973 10.1 10.1 10.1 1
1976 7.6 8.1 8.7 3 1.4 1.8 2.1
1979 7.5 7.5 7.5 1
1982 6.0 8.5 10.5 5
1983 6.0 2 2 7.2 8.6 10.0 7 1.7 1.7 1.7
1984 7.0 7.1 7.2 1
1985 4.0 35 9.4 10.5 11.0 4
1986 7.0 32 7 2 8.7 9.7 10.0 6
1987 7.6 8.2 9.2 6
1988 9.1 10.2 11.6 6
1990 7.5 8.4 9.0 3
1991 6.0 7.5 8.4 3
1992 8.5 7.5 2 8.3 10.4 12.8 7
1993 8.0 11.2 16.0 6
1994 7.0 4 11.0 11.9 14.7 5 2.0 2.0 2.0
1995 9.7 12.1 15.3 3
1996 9.4 11.1 12.7 5
1997 8.3 10.2 12.2 3
1998 5.8 8.0 9.8 6
1999 7.9 10.2 13.0 4
2000 8.5 43 4 8.6 11.4 13.4 5 1.6 1.6 1.6
2001 7.3 9.8 12.3 4
2002 9.1 11.1 12.4 5
2003 9.4 11.7 13.6 4
2004 9.6 11.5 12.9 4
2005 6.9 8.5 9.6 4
2006 7.1 8.1 8.8 4
2007 9 6.1 46 7.1 4 8.2 8.9 9.9 3
2008 7.1 8.7 11.4 4
2009 8.0 8.6 10.0 4
2010 7.3 8.6 10.3 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
9 6.7 39 7.3 3.8 4 2 5.8 9.6 16 4 1.4 1.8 2.1

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1983-08-25
1986-09-10
1992-08-07
1994-08-22
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO
0 21.1 9.3 18.5 9.4 22 8.7 21.9 8.9
1 22 8.7 21.9 9.0
2 21.1 9.3 18.5 9.4 22 8.8 21.9 9.0
3 21 8.8 21.9 8.9
4 21.1 9.3 18.5 9.3 21 8.8 21.9 8.9
5 21 8.9 21.9 8.9
6 21.0 9.3 18.3 9.2 21 8.9 21.9 9.0
7 21 8.9 21.9 8.9
8 20.5 9.3 18.3 9.2 20 8.9 21.9 8.9
9 20.0 9.4 18 9.3 19.4 9.5
10 18.0 9.6 18.2 9.2 16 10.0 13.4 10.6
11 17.5 9.7 13 10.4 11.8 10.8
12 13.5 10.5 13.0 9.4 11 10.8 10.8 10.8
13 10 11.0 10.2 10.9
14 12.0 10.8 11.0 9.6 9 11.2 10.0 10.9
15 9 11.2 9.5 10.8
16 10.0 11.0 9.8 9.6
17
18 9.0 11.2 9.0 10.0
19
20 8.0 11.4 8.0 10.2 7 11.2 8.4 10.8
21
22 8.0 10.4
23
24 7.5 10.4
25 7.1 11.7 7 11.2 7.8 10.6
26 7.0 10.4
27
28 6.8 10.6
29
30 6.3 11.9 6.4 10.8 7 11.2 7.3 10.5
31
32
33
34
35 6.0 11.9 6.0 11.0 7 11.2 7.2 10.8
36
37
38
39
40 5.7 12.1 6.0 11.0
41
42
43
44
45 5.5 12.1 5.8 11.1
46
47
48
49
50 5.3 11.2
51
52
53
54
55 5.0 11.2
56
57
58
59
60 5.0 11.2

Recent temperature and dissolved oxygen profile plots

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