Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
BELGRADE KENNEBEC 12 2 3.5 flushes/yr 238 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
32 m
(106 ft) 		8 m
(28 ft) 		537 ha
(1,328 ac) 		46,191,231 m3
(37,448 ac-ft) 		34 km2
(13 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 4.9 5.7 6.1 3
1971 4.9 6.0 6.7 4
1972 4.9 5.8 7.0 4
1973 5.5 5.5 5.5 1
1974 5.0 6.8 7.8 3
1975 5.5 6.9 8.2 5
1976 12.0 37 7.0 10.0 5.2 6.4 8.1 5 2.6 2.6 2.6
1977 10.0 10 9.5 5.8 6.7 7.8 5
1978 7 6.6 7.3 7.9 5
1979 9.0 23 9.3 6.2 6.9 7.8 6
1980 6.1 7.3 7.9 4
1981 6.1 6.7 7.5 6
1982 40 5.6 6.9 8.2 5
1983 5.5 6.5 7.3 5
1984 5.8 5.9 6.4 5
1985 8.0 37 8.0 6.7 6.1 7.2 8.2 6
1986 5.5 6.0 6.7 6
1987 5.5 6.7 7.5 5
1988 9.0 32 7.0 13.0 5.2 6.8 7.9 5
1989 5.2 5.7 6.6 5
1990 5.8 6.6 7.6 5
1991 12.0 7.5 9.0 4.6 6.5 7.9 5
1992 10.0 6.0 7.0 6.4 6.2 7.0 7.6 5
1993 4.7 6.8 7.6 5
1994 4.6 5.3 6.7 2
1995 8.0 52.0 5.9 6.6 7.5 3
1996 10.0 8.0 5.2 5.3 5.6 3
1997 9.7 16.8 3.9 6.1 7.5 7
1998 11.0 17.7 4.5 5.8 6.7 6
1999 10.5 48 8.7 18.5 5.8 6.5 7.1 5 4.0 4.0 4.0
2000 11.2 15.0 4.5 5.2 5.8 5
2001 9.5 46 7.2 8.5 19.8 5.2 6.1 6.9 6 7.0 7.0 7.0
2002 6 11.0 49 9.0 6 15.8 5.0 5.6 6.2 7 5.3 5.3 5.3
2003 9 11.5 51 8.8 20 23.5 5.0 6.1 6.7 6 3.9 3.9 3.9
2004 11 12.8 50 7.2 11.1 22.0 4.3 5.1 6.1 4 4.8 4.8 4.8
2005 13 8.7 47 7.2 7.0 4.5 5.3 6.3 8 5.5 8.1 10.6
2006 17 9.0 46 7.1 7.5 9 4.2 4.7 4.8 6 2.7 2.7 2.7
2007 9 4.4 5.5 6.9 8 3.0 3.5 4.0
2008 16 90.0 46 7.0 11.0 6 12.0 3.8 4.8 5.9 6 3.1 5.5 6.5
2009 6.5 17.0 6.0 6.3 6.7 5 0.9 2.6 4.4
2010 7.7 6.0 5.2 5.9 6.4 4
2011 9.5 7 4.9 5.8 6.2 5 4.4 5.0 5.5
2012 11 10.2 48 7.2 9.0 8 20.0 5.2 6.0 6.6 5 4.5 4.5 4.6
2013 15 10.3 46 7.3 10.0 5 5.1 5.9 8.0 8 1.9 3.1 4.2
2014 20 11.0 47 7.1 8.5 4.8 6.0 7.7 8 4.7 5.3 5.9
2015 8.0 31.0 5.5 6.5 7.3 8 3.7 3.7 3.7
2016 6 11.5 53 7.3 8.0 5.2 6.5 7.9 7 4.0 4.0 4.0
2017 7 11.0 54 7.4 7.0 5.0 6.1 7.2 10 3.6 3.6 3.6
2018 10 12.0 54 7.2 8.0 30.0 4.8 6.1 7.1 8 4.0 4.0 4.0

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
12 14 45 7.2 8.6 8.7 18 12 3.8 6.2 8.2 5.4 0.9 4.4 11

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2016-09-04
2017-08-14
2017-08-27
2017-09-15
2018-08-09
2018-08-13
2018-08-26
2018-09-09
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 23.2 8.7 24.2 8.3 22.6 8.4 21.1 8.8 28.1 8.2 26.2 8.1 24.2 8.4 23.1 8.6
1 23.1 8.7 24.2 8.3 22.6 8.3 20.7 8.9 28.0 8.2 26.2 8.0 24.1 8.4 23.1 8.5
2 23.0 8.7 24.2 8.3 22.6 8.3 20.3 8.8 28.0 8.2 26.2 8.0 24.0 8.4 23.1 8.5
3 23.0 8.6 24.2 8.3 22.6 8.3 20.1 8.7 27.9 8.2 26.1 8.0 24.0 8.4 23.1 8.5
4 23.0 8.6 24.1 8.3 22.5 8.2 20.1 8.7 27.8 8.1 26.0 8.0 24.0 8.3 23.1 8.5
5 22.9 8.5 23.9 8.3 22.5 8.2 19.8 8.6 26.1 8.1 25.6 7.4 24.0 8.3 23.1 8.6
6 22.9 8.5 23.9 8.2 22.4 8.2 19.6 8.3 24.3 6.6 24.4 6.1 23.9 8.2 23.1 8.6
7 22.9 8.5 20.3 4.6 22.4 8.2 19.4 8.1 21.8 4.6 21.8 4.5 22.3 5.3 23.1 8.6
8 22.3 7.2 16.0 3.1 17.3 2.3 19.3 7.9 18.2 3.5 18.1 3.0 18.6 1.8 20.0 1.8
9 18.0 1.7 13.9 2.8 14.3 1.9 17.8 4.3 15.3 2.8 14.6 2.5 15.6 1.2 16.8 0.5
10 15.1 1.4 12.9 2.7 12.4 2.0 15.0 0.9 13.4 2.8 13.2 2.5 13.0 1.7 13.9 0.7
11 13.6 1.7 11.9 2.9 12.0 2.1 12.5 1.2 12.0 3.4 11.8 3.4 11.9 2.5 12.1 1.5
12 12.9 1.9 11.5 3.4 11.3 2.6 11.4 1.7 11.2 3.7 11.0 3.6 11.1 2.7 11.0 2.2
13 11.9 3.2 10.4 4.5 10.4 3.8 10.3 3.1 10.0 4.6 9.5 4.7 9.6 4.8 10.1 3.3
14 10.2 5.5 9.4 6.0 8.9 6.1 8.9 5.3 8.5 6.3 8.3 6.5 8.4 6.6 8.7 5.3
15 9.2 6.1 8.1 6.8 8.0 6.7 8.2 5.9 7.1 7.0 7.0 7.5 8.0 6.7 7.5 6.7
16 8.2 6.4 7.1 7.5 7.3 6.9 7.8 6.1 6.2 7.1 6.3 8.1 6.5 7.8 6.7 7.2
17 7.7 6.6 6.7 6.8 6.9 6.8 7.1 6.1 5.8 7.2 5.8 7.8 6.0 7.5 6.1 7.9
18 7.2 6.9 6.1 7.4 6.4 6.8 6.6 6.2 5.5 8.1 5.6 7.4 5.7 8.5
19 7.0 6.5 6.0 6.8 6.1 6.8 6.1 6.2 5.4 7.2 5.3 7.7 5.4 7.4 5.5 7.4
20 6.9 6.2 5.7 7.4 5.9 6.6 5.9 6.0 5.2 7.8 5.3 7.9 5.4 7.3
21 6.8 6.1 5.7 6.7 5.8 6.6 5.8 6.0 5.2 7.0 5.1 7.7 5.2 8.1 5.2 7.2
22
23 6.6 5.7 5.5 6.8 5.5 6.5 5.5 5.9 5.0 6.8 5.0 6.9 5.0 6.8 5.0 6.3
24
25 6.5 4.1 5.3 6.2 5.2 5.9 5.4 4.5 4.9 5.6 4.9 5.2 4.9 5.7 5.0 3.4
26
27 6.4 1.2 5.1 4.3 5.2 2.9 5.3 2.6 4.9 1.1 4.8 1.1 4.9 1.7 4.9 0.7
28 6.3 0.8 5.1 2.9 5.1 2.6 5.3 1.4 4.9 0.6 4.8 0.4
29 5.1 1.0 5.1 2.0
30 5.3 1.3

Most recent temperature and dissolved oxygen profile plots

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