Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
BELGRADE KENNEBEC 20 1 0.54 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
17 m
(57 ft) 		7 m
(23 ft) 		270 ha
(666 ac) 		20,000,000 m3
(16,214 ac-ft) 		8 km2
(3.1 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
1975 38 18 3.6 4.8 6.0 2 9.2 12.8 16.3
1976 25 1.0 4.3 7.5 6 3.1 7.5 13.8
1977 17 37 15 8 17 2.4 5.0 8.4 8 2.3 7.5 15.3
1978 17 71 13 22 17 63 4.4 4.9 5.8 6 1.9 3.4 6.1
1979 16 44 17 44 2.5 5.4 7.5 6 2.0 3.9 9.1
1980 18 55 2.0 4.2 7.0 9 2.2 8.9 25.9
1981 16 58 4.3 6.1 9.4 8 1.7 3.6 5.4
1982 17 60 9 150 4.0 5.5 7.9 6 1.4 3.8 7.0
1983 4.0 5.6 7.0 6 2.4 3.8 5.2
1984 28 1.0 3.6 6.5 5 4.3 4.3 4.3
1985 2.2 4.4 6.2 6 4.9 9.1 14.5
1986 2.5 4.6 7.0 6
1987 16 28 3.0 4.5 8.5 7
1988 16 47 16 42 3.6 4.1 4.8 2
1989 3.0 5.5 7.4 5
1990 21 66 7.7 10 4.5 5.7 6.8 5
1991 3.5 5.3 7.0 5
1992 11 20 4.0 6.5 9.2 6
1993 16 4.1 6.7 8.8 6
1994 11 66 4.2 5.9 7.5 4 1.9 2.5 3.1
1995 19 3.2 4.8 6.9 5
1996 14 3.0 4.1 5.5 3
1997 19 74 7.6 13 122 4.2 5.5 8.9 9 3.0 3.0 3.0
1998 14 340 2.4 4.5 6.3 4
1999 21 79 16 120 80 2.1 4.4 8.6 11 1.5 3.5 6.3
2000 14 106 3.1 5.1 6.8 6
2001 14 114 2.5 5.1 7.0 6
2002 1.8 4.0 6.5 5
2003 13 54 1.8 4.0 6.2 9
2004 4 24 85 7.9 17 118 104 2.3 3.4 5.6 5 13.0 13.0 13.0
2005 11 12 4.1 5.3 6.8 3
2006 7 20 77 7.8 12 24 3.1 4.5 6.4 3 6.3 6.3 6.3
2007 8 21 74 7.8 10 44 5.3 6.3 7.9 4 5.3 5.3 5.3
2008 6 10 76 7.4 11 10 91 3.9 5.4 7.1 6 7.4 7.4 7.4
2009 10 10 250 2.9 4.9 7.1 9 9.8 9.8 9.8
2010 20 9 320 62 2.6 5.3 7.5 7 6.9 6.9 6.9
2011 18 28 2.4 4.5 6.6 7
2012 5 23 80 7.6 14 375 2.9 4.8 5.9 6 8.8 8.8 8.8
2013 9 23 79 7.7 13 150 4.5 5.1 6.5 5 6.0 6.0 6.0
2014 11 24 74 7.5 15 229 11 1.8 4.4 6.4 8 6.4 10.2 17.0
2015 8 87 4.3 5.9 8.4 3 2.2 2.2 2.2
2016 2 24 80 8.3 13 177 2.7 5.1 6.9 4 7.5 7.5 7.5
2017 4 26 84 7.9 12 182 4.8 6.5 7.6 3 3.3 3.3 3.3

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
6.2 20 67 7.7 14 14 124 48 1 5 9.4 5.7 1.4 6.3 26

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2014-08-13
2014-08-18
2014-09-03
2014-09-04
2014-09-17
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 24.0 9.4 23.0 8.8 24 8.9 23.4 9.3 19.1 8.6 23 8.2 25 8.9 24 8.7
1 24.1 9.4 23.0 8.7 24 9.5 23.4 9.2 19.1 8.6 23 8.3 25 9.1 24 8.7
2 24.1 9.4 23.0 8.6 24 9.3 23.4 9.3 19.0 8.5 23 8.3 25 9.2 24 8.7
3 24.1 9.4 23.0 8.5 24 9.4 23.4 9.2 18.9 8.5 23 8.3 24 9.1 24 8.7
4 24.0 9.3 23.0 8.4 24 9.4 23.1 9.4 18.8 8.4 23 8.2 24 9.0 24 8.7
5 23.4 8.6 23.0 8.4 23 9.3 22.5 8.3 18.8 8.2 23 8.1 24 8.9 23 8.6
6 22.9 7.8 23.0 8.6 23 9.0 21.9 6.9 18.7 8.1 23 7.9 24 8.7 23 8.5
7 18.6 5.6 22.0 8.0 20 4.5 20.4 4.4 18.7 7.9 21 6.5 22 5.5 22 8.1
8 14.8 3.9 17.2 4.5 13 3.7 15.3 0.4 17.0 1.5 18 4.6 18 1.3 16 1.6
9 12.5 2.4 13.0 2.2 14 0.8 12.4 0.4 12.7 0.8 14 0.7 16 0.5 14 0.8
10 10.9 1.0 10.8 0.7 12 0.3 11.1 0.4 11.4 0.7 12 0.3 14 0.5 12 0.6
11 10.2 0.7 10.0 0.5 12 0.3 10.2 0.4 10.4 0.7 11 0.3 13 0.4 11 0.5
12 9.7 0.7 9.4 0.3 10 0.2 9.6 0.4 10.0 0.6 12 0.4 10 0.5
13 9.5 0.6 9.2 0.3 10 0.2 9.5 0.4 9.8 0.6 12 0.4 10 0.5
14 9.1 0.6 9.1 0.3 9 0.1 9.7 0.6 12 0.4 10 0.4
15 9.1 0.2 9 0.1 10 0.4

Recent temperature and dissolved oxygen profile plots

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