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 6.2 6.4 3
1971 5.5 6.8 9.4 4
1972 3 4.5 5.2 7.1 8.2 4
1974 6.6 6.6 6.6 1
1975
1976 9 8 25.0 5.8 6.4 7.9 5 2.6 3.1 3.6
1989 6.4 6.4 6.4 1
1992 10 9.0 8.0 11 6.4 7.2 7.8 3
1993 4.9 6.0 6.8 5
1995 10 9.7 18.5 4.6 6.2 8.2 6
1996 12.0 68.5 4.8 5.7 7.1 4
1997 9.6 18 4.8 5.8 7.3 6
1998 10.0 18 4.9 5.8 6.8 6
1999 10 50 9.8 55.3 16 5.7 6.5 7.3 6 4.2 4.2 4.2
2000 11 48 11.6 33.8 13 4.1 5.0 6.2 5 5.8 5.8 5.8
2001 10.0 17.5 5.1 5.9 7.4 5
2002 12.0 10 50 11.3 36.1 5.3 6.3 7.8 5 3.4 4.2 4.9
2003 8.5 12 50 10.2 7 53.2 5.0 6.5 7.2 6 5.0 5.0 5.0
2004 12.0 12 53 7.2 9.5 63.0 4.7 5.3 6.3 4 7.4 7.4 7.4
2005 4.5 5.1 5.6 7
2006 4.6 5.4 6.6 4
2007 5.0 5.9 6.9 4
2008 9.5 4.6 5.4 6.5 5 4.4 4.4 4.4
2009 9.2 15.9 21 4.5 6.1 7.5 7 3.1 4.6 5.9
2010 8.3 15.9 5.5 6.6 7.8 9 2.9 4.1 5.2
2011 11.1 8 15.5 4.5 6.5 9.4 5
2012 9.0 10 49 7.0 8.0 25.0 5.3 6.2 7.0 4 4.1 4.1 4.1
2013 11.5 10 49 7.3 9.0 5.7 6.5 7.0 5 4.7 4.7 4.7
2014 13.0 11 49 7.1 9.0 16.0 5.0 6.3 7.2 6 5.5 5.5 5.5
2015 9.0 5.6 5.6 5.6 1 3.8 3.8 3.8
2016 5.0 11 52 7.3 9.0 16.0 4.1 5.5 6.6 4 3.2 3.2 3.2
2017 5.0 12 63 7.4 9.0 4.0 4.9 6.1 4 5.4 5.4 5.4
2018 11.0 14 56 7.4 10.0 24.0 6.6 6.6 6.6 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 52 7.2 9.7 6.5 28 16 4 6.1 9.4 4.5 2.6 4.6 7.4

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2014-09-15
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 20 8.1 24 7.8 24 8.2 23 8.0 24 8.5 27.6 8.5
1 20 8.0 24 7.8 24 8.2 23 7.9 24 8.5 23 8.7 20 9.2 27.6 8.5
2 20 7.9 24 7.8 24 8.2 23 7.9 24 8.5 23 8.7 20 9.1 27.5 8.5
3 20 7.9 24 7.7 24 8.2 23 7.8 24 8.4 22 8.7 20 9.1 27.4 8.5
4 20 7.9 24 7.7 24 8.1 23 7.7 23 8.5 22 8.7 20 9.2 27.4 8.4
5 20 8.0 24 7.6 24 8.1 23 7.5 23 8.4 22 8.6 19 9.2 26.3 8.7
6 20 8.0 24 7.5 24 8.1 23 7.2 23 8.3 22 8.6 19 9.1 25.3 7.8
7 20 7.9 24 7.6 24 8.0 23 7.4 23 8.3 22 8.5 19 9.1 24.4 6.5
8 20 7.9 24 7.4 23 6.8 23 7.3 22 5.7 22 8.2 19 9.0 22.2 4.0
9 20 7.4 20 3.7 20 3.6 23 7.1 19 3.5 22 6.7 19 9.0 19.0 2.0
10 17 1.6 19 3.2 17 3.0 23 7.0 16 3.2 20 4.3 19 8.9 16.7 1.5
11 15 1.1 17 2.8 15 3.3 21 4.1 15 3.2 16 3.7 19 8.5 15.1 2.4
12 13 1.2 16 2.9 14 3.5 20 2.0 13 3.5 15 3.6 17 4.6 13.3 2.7
13 12 1.2 15 2.7 14 3.5 17 1.0 13 3.8 14 3.8 15 3.6 11.6 2.9
14 11 1.1 15 2.8 12 3.0 15 1.0 12 3.6 14 3.9 14 3.4 10.3 2.6
15 11 1.0 14 2.5 12 2.8 15 0.8 12 3.6 13 4.0 14 3.5 9.8 2.4
16 11 1.0
17 10 1.0 14 2.2 12 2.6 14 0.6 12 3.2 13 3.9 13 3.6 9.6 2.2
18 10 1.0
19 10 1.0 14 0.1 11 1.8 14 0.4 11 2.8 13 3.9 13 3.6 9.3 1.7
20 10 1.0
21 10 0.9 14 0.1 14 0.4 13 3.4 13 3.8 13 3.6
22
23 14 0.1 14 0.4 13 3.5 13 3.8 13 3.6
24
25 14 0.1 14 0.4 12 3.6 13 3.8 13 3.6
26
27 14 0.1 14 0.4 12 3.6 13 3.8 13 3.6

Most recent temperature and dissolved oxygen profile plots

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