Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
BELGRADE KENNEBEC 12 1 0.43 flushes/yr 248 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
21 m
(69 ft) 		7 m
(24 ft) 		3,312 ha
(8,183 ac) 		240,649,445 m3
(195,098 ac-ft) 		83 km2
(32 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 5.8 6.0 6.4 3
1971 5.8 6.9 9.1 4
1972 5.0 6.1 7.4 8.2 4
1973 5.5 6.1 6.7 1
1974 5.8 6.4 6.9 3
1975 5.9 6.9 7.5 4
1977 5.0 9 4.8 6.2 7.0 5 2.9 2.9 2.9
1978 5.9 7.0 7.6 6
1979 6.2 6.9 7.9 5
1980 11.5 40 11.0 100.0 6.0 7.2 8.2 5 3.5 3.5 3.5
1981 5.8 7.2 8.2 6
1982 5.9 7.1 7.9 6
1983 9.0 9.0 10.0 5.5 6.8 7.8 5 3.0 3.0 3.0
1984 5.5 6.0 6.6 4
1985 6.2 8.1 9.1 6
1986 10.0 33 8.0 19.0 5.6 6.5 7.2 6
1987 5.9 6.6 7.0 6
1988 5.0 6.3 8.2 6
1989 4.9 6.1 7.5 5
1990 5.3 6.1 7.0 4
1991 5.4 6.5 7.5 5
1992 11 4.9 6.0 6.8 3
1993 6.0 14 6.2 6.2 6.2 1
1994 4.8 5.4 5.8 3
1995 6.2 6.3 6.5 1
1996 6.9 7.0 7.0 2
1997 13.0 47 7.3 8.0 7.0 7.0 7.0 1 2.7 2.7 2.7
1999 5.2 6.1 6.9 5
2000 11.0 4.2 5.0 5.8 4
2001 4.9 6.2 7.1 2
2002 10 9.5 50 7.5 10.7 4.6 5.8 8.2 5 3.7 5.5 7.4
2003 7 11.5 49 10.0 26.0 6.0 6.0 6.0 1 4.9 4.9 4.9
2004 11 12.5 53 7.1 10.0 31.0 4.2 5.0 5.8 2 9.5 9.5 9.5
2005 12 8.4 50 7.3 9.0 10 10.0 4.6 5.1 5.8 6 7.6 7.6 7.6
2006 4.7 5.5 6.6 5
2007 4.9 6.0 6.8 3
2008 12 8.4 47 7.1 9.2 18.0 4.6 5.2 6.2 6 5.2 6.2 7.1
2009 8.7 13.4 17 4.5 6.1 7.5 9 2.5 4.0 5.6
2010 8.2 12.7 5.5 6.4 7.6 8 2.4 3.5 4.7
2011 9.5 10.2 5.1 6.8 9.1 4
2012 9 10.0 49 7.0 10.0 41.0 5.4 6.5 7.1 4 4.9 4.9 4.9
2013 11 10.3 48 7.3 9.0 9.5 5.9 6.8 8.0 4 4.2 4.2 4.2
2014 11 11.0 49 7.1 9.0 10.0 5.0 6.5 7.2 6 4.5 4.5 4.5
2015 9.0 13.0 6.9 7.0 7.0 2 4.0 4.0 4.0
2016 4 11.0 53 7.3 10.0 11.5 4.4 5.5 6.9 4 3.7 3.7 3.7
2017 10 12.0 59 7.4 7.0 11.0 4.3 5.2 6.3 4 5.7 5.7 5.7
2018 10 14.0 55 7.4 11.0 14.5 6.2 6.2 6.2 1 5.0 5.0 5.0

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
9.7 11 49 7.2 8.9 9.5 20 14 4.2 6.3 9.1 4.1 2.4 4.7 9.5

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2015-08-19
2016-08-09
2016-08-18
2016-09-03
2017-08-14
2017-08-27
2017-09-09
2018-08-09
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 25 8.1 25 7.9 24 8.1 23 7.4 23.4 8.5 27 8.5
1 25 8.2 24 7.9 24 8.1 23 7.4 23.7 8.6 23 8.9 20 9.4 27 8.5
2 25 8.1 24 7.8 24 8.1 23 7.4 23.6 8.6 23 8.9 20 9.0 27 8.5
3 25 8.1 24 7.7 24 8.1 23 7.4 23.6 8.6 22 9.0 20 9.1 27 8.6
4 25 8.0 24 7.7 24 8.1 23 7.4 23.5 8.5 22 8.9 20 9.1 26 8.8
5 24 8.0 24 7.7 24 8.1 22 7.4 23.3 8.4 22 8.8 20 8.9 26 8.7
6 24 7.8 24 7.7 24 8.1 22 7.4 23.3 8.3 22 8.8 20 8.9 26 8.5
7 23 7.0 24 6.7 24 8.0 22 7.3 23.2 8.3 22 8.8 19 8.5 25 7.6
8 22 5.8 21 4.6 24 8.0 22 7.3 20.6 5.0 22 8.8 19 8.6 24 6.3
9 22 4.4 18 4.0 22 5.0 22 6.9 18.1 3.6 18 4.1 19 8.4 22 3.1
10 20 2.4 16 4.0 21 4.7 19 2.2 16.0 3.7 15 4.2 17 5.4 20 1.7
11 19 1.7 15 3.9 17 2.0 17 1.6 14.8 3.6 14 5.0 14 3.9 17 1.2
12 18 1.4 14 4.1 16 1.8 14 2.1 14.1 3.8 13 5.4 13 4.5 16 1.0
13 17 1.1 13 4.2 16 1.9 13 2.3 13.2 3.9 12 5.6 12 4.8 15 1.0
14 16 1.1 12 4.1 15 1.9 12 1.8 12.5 3.8 11 5.5 11 4.8 15 0.9
15 16 0.9 12 3.8 15 1.9 12 1.7 11.8 3.8 11 5.5 11 4.5 14 0.8
16 15 0.8
17 15 0.4 11 3.4 15 1.6 11 1.2 11.6 3.6 10 5.3 10 4.5 13 0.6
18 12.8 1.3 13 0.6
19 14 0.3 11 2.8 14 1.5 11 0.5 10.0 5.5 10 4.9 10 4.5
20 14 1.4
21 11 0.2 11 0.3 9.9 4.6 10 4.7 10 4.5
22
23 11 0.1 11 0.3 9.9 4.7 10 4.7 10 4.5
24
25 11 0.1 11 0.2 9.9 5.3 10 4.8 10 4.5
26
27 11 0.1 11 0.2 9.9 5.3 10 4.9 10 4.5

Most recent temperature and dissolved oxygen profile plots

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