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
1977 3.2 8.6 9.5 10.3 2
1990 8.8 11.5 14.2 7
1991 10.2 12.2 14.6 4
1992 7.5 7.8 4 13.4 13.4 13.4 1
2000 9.8 10.9 12.3 8
2017 7 8.0 53 7.3 4 9.4 9.4 9.4 1 1.8 1.8 1.8

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
7 7.8 53 7.5 4 3.2 8.6 11 15 3.8 1.8 1.8 1.8

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
1990-09-11
1990-09-25
1991-08-13
1991-08-27
1991-09-13
1991-09-24
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 20.5 8.7 16.7 9.1 22.6 8.4 21.1 8.9 19.1 9.3 17.5 9.3 22.1 8.9 23.3 8.9
1 20.4 8.6 16.7 9.0 22.3 8.4 21.0 8.9 19.0 9.3 17.4 9.0 21.7 8.8 21.0 9.1
2 20.3 8.6 16.7 9.1 21.1 8.5 21.0 8.9 19.0 9.2 17.4 9.0 21.5 8.8 20.4 9.1
3 20.3 8.6 16.7 9.1 22.1 8.4 20.8 9.0 19.0 9.2 17.4 9.0 21.5 8.9 20.1 9.1
4 20.3 8.7 16.7 9.1 22.0 8.5 20.7 8.9 18.9 9.2 17.4 9.0 21.5 8.8 19.8 9.1
5 20.2 8.7 16.7 9.2 22.0 8.5 20.7 8.9 18.8 9.2 17.4 9.0 21.5 8.9 19.6 9.1
6 20.2 8.7 16.7 9.2 22.0 8.5 20.6 8.8 18.9 9.1 17.4 8.9 21.4 8.8 19.2 9.1
7 20.2 8.7 16.7 9.2 22.0 8.5 20.6 8.9 18.9 9.2 17.4 9.0 21.0 8.8 19.0 9.0
8 20.2 8.7 16.7 9.2 21.9 8.5 19.2 8.9 18.9 9.2 17.3 9.0 20.0 8.8 18.9 9.0
9 18.9 8.9 16.7 9.2 20.3 8.8 16.6 9.3 18.9 9.2 17.3 9.0 15.8 10.1 18.3 8.9
10 14.3 9.9 16.7 9.3 15.6 10.1 14.7 9.9 18.8 9.1 17.3 9.0 13.2 10.6 13.1 10.0
11 13.0 10.0 16.7 9.3 13.6 10.5 13.8 9.9 16.1 9.6 17.3 8.9 11.5 11.0 10.5 10.4
12 11.2 10.2 16.7 9.2 13.1 10.7 13.0 10.1 15.1 9.7 17.3 9.0 10.2 11.2 9.7 10.4
13 10.7 10.2 16.7 9.3 11.9 10.9 12.6 10.2 13.9 9.9 17.3 9.0 9.8 11.3 9.1 10.4
14 10.5 10.2 13.0 9.8 10.9 11.1 12.2 10.3 13.2 9.9 15.0 9.2 9.1 11.4 8.9 10.4
15 10.3 10.2 11.2 9.9 10.2 11.2 12.6 10.1 13.6 9.3 8.9 11.4 8.7 10.4
16 10.0 10.3 10.8 9.9 11.3 10.5 12.1 10.1 12.6 9.5
17 11.3 10.3 11.7 9.6 8.4 10.3
18 9.3 10.3 10.1 10.0 8.9 11.4 10.6 10.6 11.1 10.4 11.1 9.7
19 8.0 10.3
20 8.9 10.3 9.2 9.9 9.9 10.7 7.8 11.3
21 7.8 11.4 10.4 10.5 10.2 9.7 7.6 10.2
22 8.6 9.9 9.4 10.8
23 8.6 10.3 7.4 10.2
24 8.4 10.0 7.5 11.4 8.9 10.9 9.2 10.6 9.6 9.8
25 6.8 11.3 7.1 10.1
26 8.2 10.3
27 7.2 11.5 8.6 10.5 8.7 9.8
28 8.1 10.0 8.0 10.9
29 7.8 10.3
30 7.5 10.3 7.6 9.9 7.0 11.5 7.7 10.8 8.3 10.6 8.2 9.9 6.4 11.3 6.8 10.1
31
32
33
34
35 7.4 10.3 7.4 10.0 6.7 11.3 7.4 10.7 7.9 10.6 7.8 9.7 6.2 11.2 6.6 9.9
36
37
38
39
40 7.2 10.2 7.2 9.8 6.5 11.2 7.2 10.7 7.5 10.4 7.5 9.6 6.0 11.1 6.4 9.7
41
42
43
44
45 6.9 9.9 7.1 9.7 6.4 10.7 7.0 10.5 7.3 10.5 7.3 9.3 5.9 10.9 6.3 8.8
46
47
48
49
50 6.9 7.0 7.0 8.5 6.3 10.4 7.2 10.2 7.2 9.1 6.0 10.6

Recent temperature and dissolved oxygen profile plots

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