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.

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
1982 6.0 6.8 7.8 3
1983 7.2 8.4 10.2 6
1984 6.6 7.3 8.0 1
1985 8.5 10.4 11.2 4
1986 8.5 9.6 10.3 6
1987 7.2 8.3 8.8 6
1988 9.1 10.2 12.2 6 1
1989 5.7 7.7 9.4 3
1990 7.0 10.6 13.8 8
1991 6.0 9.8 13.8 6
1992 8.0 8.1 3 7.0 9.6 13.2 2
1998
2000 8.5 44 3 9.1 11.2 12.2 8 1.6 1.6 1.6
2007 8 6.2 46 7.1 3
2017 9 8.5 54 7.3 4 8.6 8.6 8.6 1 1.9 1.9 1.9

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
8.5 7.8 48 7.4 3.5 3 5.7 9.1 14 4.6 1.6 1.8 1.9

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1990-08-27
1990-09-11
1990-09-25
1991-08-13
1991-08-27
1991-09-13
1992-08-07
2017-09-14
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 23.5 8.7 20.8 8.7 16.6 9.3 22.2 8.4 20.4 9.1 18.9 9.3 21.1 8.6 21.6 9.1
1 23.4 8.8 20.7 8.7 16.5 9.3 22.2 8.5 20.3 9.1 18.9 9.3 21.0 8.6 20.4 9.2
2 23.3 8.8 20.5 8.7 16.5 9.3 21.8 8.5 20.2 9.1 18.4 9.3 21.0 8.6 19.8 9.2
3 23.2 8.9 20.4 8.8 16.4 9.3 21.7 8.6 20.1 9.2 18.9 9.3 20.9 8.6 19.7 9.2
4 22.8 8.9 20.3 8.7 16.4 9.3 21.6 8.5 20.0 9.1 18.9 9.3 20.8 8.6 19.3 9.2
5 22.6 9.0 20.2 8.8 16.4 9.3 21.6 8.5 19.7 9.1 18.9 9.3 20.8 8.6 19.0 9.2
6 22.5 8.9 20.2 8.8 16.4 9.3 21.5 8.4 19.7 9.2 18.9 9.4 20.8 8.5 18.8 9.2
7 22.5 8.9 20.2 8.8 16.4 9.4 21.4 8.5 19.6 9.2 18.8 9.4 20.7 8.5 18.8 9.1
8 22.4 8.9 20.2 8.8 16.4 9.4 18.6 9.1 17.6 9.5 18.8 9.4 19.8 8.6 18.7 9.1
9 22.3 8.9 20.1 8.8 16.4 9.4 16.2 9.8 16.4 9.8 18.8 9.4 16.5 9.3 18.6 9.1
10 16.0 10.2 17.1 9.2 16.4 9.4 14.8 10.0 16.0 9.9 18.8 9.4 13.8 10.0 18.1 9.1
11 13.7 10.8 13.0 10.1 16.3 9.3 14.2 10.3 14.6 10.2 18.8 9.4 11.8 10.5 13.0 10.1
12 12.5 11.0 12.3 10.1 16.3 9.3 13.5 10.5 13.8 10.4 16.1 9.9 11.0 10.6 11.6 10.1
13 11.6 11.1 11.8 10.2 15.1 9.5 12.6 10.7 13.6 10.3 14.0 10.3 10.3 10.6 10.4 10.3
14 10.6 11.3 11.2 10.3 11.6 9.9 10.3 11.3 13.2 10.5 13.1 10.4 9.8 10.8 9.7 10.3
15 10.2 11.4 10.4 10.4 10.8 10.1 9.8 11.4 12.3 10.7 12.3 10.6 9.0 10.9 9.0 10.5
16 9.6 11.5 10.2 10.5 10.5 10.1 11.3 11.0 11.2 10.8 8.3 10.6
17 9.8 10.5 10.3 11.1 7.9 10.7
18 8.8 11.8 9.0 10.8 9.6 10.3 8.5 11.8 9.9 11.4 9.9 11.3
19 7.5 10.7
20 8.5 11.8 8.2 11.1 8.8 10.6 9.3 12.6 6.9 11.2
21 7.6 12.1 9.4 11.6 6.9 10.9
22 7.9 11.7 7.7 11.3 8.0 10.9 8.6 11.8
23 6.5 11.0
24 7.5 12.1 7.4 11.4 7.6 11.0 7.0 12.3 8.2 11.8 8.8 11.8
25 6.1 11.3 6.3 11.1
26 7.2 12.1 6.9 11.6 7.2 11.2
27 6.7 12.4 8.5 11.7
28 6.9 12.1 7.6 12.0
29 6.5 11.8
30 6.3 12.3 6.2 11.9 6.7 11.4 6.3 12.5 6.8 12.2 7.6 12.0 5.7 11.5 5.7 11.2
31
32
33
34
35 6.0 12.3 6.0 11.9 6.1 11.7 5.9 12.7 6.4 12.4 6.6 12.4 5.1 11.6 5.3 11.2
36
37
38
39
40 5.7 12.2 5.7 12.1 5.7 11.8 5.5 12.8 6.0 12.6 5.9 12.6 5.0 11.5 5.1 11.2
41
42
43
44
45 5.5 12.1 5.3 12.2 5.3 12.8 5.5 12.7 4.8 11.6 4.8 11.2
46
47
48
49
50 7.2 11.8 5.1 12.2 5.4 11.9 5.2 12.8 5.2 12.7 5.6 12.7 4.5 11.6 4.6 11.2
51
52
53
54
55 5.1 11.6 5.0 12.2 5.2 12.0 5.0 13.0 5.0 12.8 5.3 12.8 4.2 11.6 4.6 11.2
56
57
58
59
60 5.0 11.5 4.9 12.1 5.1 12.1 4.8 13.1 4.9 13.0 5.1 12.9 4.2 11.6 4.5 11.1
61
62
63
64
65 4.8 11.3 4.8 12.2 5.0 12.1 4.8 13.2 4.9 13.0 5.0 13.0 4.4 11.1
66
67
68
69
70 4.8 11.2 4.7 12.3 4.9 12.1 4.7 13.1 4.8 13.1 4.8 13.0 4.3 10.9
71
72
73
74
75 4.7 11.0 4.7 12.2 4.7 13.0 4.6 13.1 4.3 10.7
76
77
78
79
80 4.6 10.8 4.5 11.8 4.8 11.9 4.5 13.2 4.6 13.0 4.8 13.0 4.2 10.6
81
82
83
84
85 4.5 10.2 4.6 9.1 4.7 11.6 4.4 13.0 4.5 12.8 4.7 12.7 4.1 9.9
86
87
88
89
90 4.5 2.9 4.7 6.2 4.5 9.0 4.5 12.7 4.1 9.2

Recent temperature and dissolved oxygen profile plots

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