Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
BELGRADE KENNEBEC 12 1 1.59 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
34 m
(113 ft) 		10 m
(31 ft) 		1,418 ha
(3,505 ac) 		136,209,103 m3
(110,427 ac-ft) 		119 km2
(46 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
1970 5.6 6.7 7.3 4
1971 3.5 5.7 7.5 5
1972 6 4.6 5.5 6.9 6
1973 4.7 5.0 5.3 2
1974 4.3 5.1 6.1 3
1975 4.6 5.2 6.2 4
1976 12 10 13 4.9 5.3 5.8 5 5.2 5.2 5.2
1977 8 3.9 4.8 5.5 5 2.5 2.5 2.5
1978 12 48 6 16 4.4 5.1 5.9 2 2.6 2.6 2.6
1979 4.9 5.7 6.4 5
1980 4.6 5.5 6.0 4
1981 13 38 9 16 5.0 5.6 6.0 6 2.6 2.6 2.6
1982 4.4 5.2 6.9 4
1983 17 4.7 4.7 4.7 1
1984 4.3 4.3 4.3 1
1989 10 41 7 5.5 5.6 5.8 2 3.1 3.1 3.1
1990 12 5.1 5.1 5.1 1
1991 4.0 5.6 6.9 5
1996 12 47 9 12 4.6 5.4 6.0 4 3.6 3.6 3.6
1997 3.9 5.0 5.7 5
1998 4.8 4.8 4.8 1
1999 6 4.9 6.0 7.1 2
2000 4.8 6.0 6.3 3
2001 12 49 7.3 14 4.6 5.7 6.9 9 5.3 5.3 5.3
2002 13 12 54 12 4.8 5.4 7.0 4 3.6 3.6 3.6
2003 13 4.5 5.2 5.9 3
2004 15 14 57 7.3 11 9 4.1 5.4 6.4 4 3.9 3.9 3.9
2005 18 10 52 7.1 12 4.0 4.9 6.1 6 4.0 4.0 4.0
2006 20 11 50 7.2 10 28 4.5 5.2 5.8 4 5.0 5.0 5.0
2007 17 11 48 7.3 10 4.5 5.0 6.2 4 3.9 3.9 3.9
2008 20 11 50 7.1 13 11 18 4.4 4.9 5.7 5 5.0 5.0 5.0
2009 12 3.6 5.1 6.0 4
2011 9 6.0 6.0 6.0 1 4.0 4.0 4.0
2012 16 13 54 7.1 12 104 4.2 4.3 4.5 1 4.2 4.2 4.2
2013 20 13 54 7.3 10 5.2 5.2 5.2 1 5.0 5.0 5.0
2014 19 13 51 7.0 11 4.6 4.6 4.6 1 4.9 4.9 4.9
2015 11 13 5.2 5.3 5.3 2 6.0 6.0 6.0
2016 9 14 58 7.4 10 6.6 6.6 6.6 1 4.5 4.5 4.5
2017 13 16 29 7.4 10 6.0 6.0 6.0 1 4.2 4.2 4.2

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
16 12 49 7.2 11 8.3 25 14 3.5 5.3 7.5 3.4 2.5 4.2 6

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2009-09-05
2011-08-09
2012-09-12
2013-08-12
2014-08-14
2015-08-13
2016-08-18
2017-08-23
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 23.7 7.9 24.7 8.5 21.5 7.4 22.4 8.1 23.8 8.4 24.2 8.5 24.6 8.3 24.1 8.4
1 22.5 7.9 24.6 8.6 21.5 7.3 22.3 8.1 23.7 8.4 24.1 8.5 24.6 8.3 24.0 8.4
2 22.1 7.8 24.5 8.6 21.4 7.2 22.2 8.1 23.6 8.4 23.9 8.5 24.6 8.3 24.0 8.4
3 22.0 7.6 24.4 8.4 21.4 7.2 22.2 8.1 23.5 8.3 23.8 8.4 24.4 8.2 24.0 8.4
4 21.9 7.5 24.2 8.2 21.2 7.1 22.1 8.1 23.5 8.3 23.7 8.2 24.3 8.2 24.0 8.4
5 21.8 7.6 24.0 7.9 21.1 6.9 21.9 8.0 23.2 8.0 23.4 7.8 24.2 8.2 24.0 8.4
6 21.5 7.4 23.6 7.4 21.0 6.9 21.9 7.9 23.1 7.8 23.2 7.7 24.0 7.8 24.0 8.4
7 21.1 6.9 22.8 6.0 20.9 6.9 21.9 7.8 23.1 7.8 23.0 7.0 23.9 7.9 24.0 8.4
8 21.1 6.7 22.0 4.7 20.9 6.9 21.8 7.6 23.0 7.7 22.6 6.2 23.9 7.8 24.0 8.3
9 21.0 6.5 19.3 2.6 20.8 6.9 20.6 4.5 21.7 5.2 21.5 4.1 23.2 6.1 23.9 8.3
10 20.3 4.3 17.5 1.8 20.4 6.2 16.2 1.0 20.7 3.3 18.8 1.8 19.4 1.6 17.7 0.5
11 19.2 1.1 16.3 1.7 20.7 5.6 15.4 0.8 16.5 1.8 17.4 1.6 18.1 1.2 16.3 0.5
12 18.7 0.7 15.5 1.8 20.0 5.3 14.9 1.0 15.7 1.7 16.6 1.6 16.0 0.9 15.5 0.4
13 17.9 0.7 15.2 2.1 17.7 3.1 14.4 1.1 14.8 1.9 15.8 1.8 15.1 1.2 14.9 0.5
14 17.5 0.6 14.7 2.5 16.0 3.1 13.9 1.8 13.8 2.2 15.0 2.0 13.8 1.7 12.5 1.5
15 16.3 1.1 14.0 3.1 14.2 2.4 12.5 2.6 11.9 3.5 12.1 3.3 12.2 2.7 11.1 2.3
16 13.1 4.1 11.4 3.1
17 13.9 1.7 11.8 4.7 11.8 1.4 10.7 3.7 9.4 5.3 8.8 5.0 10.0 3.8 9.0 3.2
18 10.6 5.3 9.3 4.2
19 11.9 2.2 10.0 5.5 10.1 2.3 8.2 4.8 7.4 6.3 7.9 5.4 9.1 4.4 7.5 3.7
20 8.7 5.7 8.1 5.0 7.2 6.4
21 8.9 2.3 7.9 5.6 9.0 2.3 8.0 5.0 7.4 5.5 8.8 4.4 7.0 3.9
22 7.7 5.5 7.9 5.0
23 7.8 1.9 7.6 5.4 8.5 1.9 7.8 5.0 7.1 5.3 8.3 4.4 6.8 3.9
24 7.5 5.4
25 7.2 1.5 7.4 5.3 8.2 1.7 7.7 4.9 6.9 6.1 7.0 5.1 8.2 4.3 6.7 3.8
26
27 7.3 5.2 7.6 4.7
28
29 7.0 1.1 7.2 4.8
30 7.2 4.7 7.8 0.4 7.5 4.5 6.8 5.5 6.8 4.2 7.9 3.5 6.5 3.1

Recent temperature and dissolved oxygen profile plots

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