Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
MONMOUTH KENNEBEC 12 1 0.5 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
8 m
(28 ft)
6 m
(19 ft)
156 ha
(385 ac)
8,891,453 m3
(7,208 ac-ft)
7 km2
(2.8 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
1976 17 4.2 5.7 7.8 7 2.6 4.7 12.1
1978 10 4.1 4.8 5.4 2 3.8 3.8 3.8
1979 19 4.1 5.1 6.1 5 2.9 5.6 8.1
1980 27 27.2 0.8 4.9 7.5 6 4.6 27.0 93.0
1981 20.8 1.6 4.3 7.6 9 2 1.9 11.8 28.0
1982 17 51 25.8 3.6 5.5 7.4 9 1.6 4.8 9.0
1983 16 26 14.3 4.1 6.0 8.7 9 1 1.8 3.5 6.1
1984 16 45 29.5 0.8 3.8 6.6 8 5.0 22.4 69.4
1985 47 20.2 1.7 5.0 7.5 9 2.5 7.0 16.0
1986 12 45 12.9 4.3 7.5 9.2 8 9 1.1 2.5 4.0
1987 13 9.9 5.0 7.3 8.7 8 7 1.9 11.5 53.7
1988 13 8 10.1 4.7 6.9 8.7 8 0.9 2.4 4.6
1989 4.1 5.8 6.8 5
1990 16 7.0 11.7 4.6 6.6 8.7 6 1.2 2.7 6.0
1991 15 7.0 12.9 5.3 6.3 8.3 8 1.4 3.2 5.4
1992 15 6.9 5.1 7.1 8.7 7 1 1.8 2.9 4.9
1993 16 7.0 11.3 6.6 7.8 8.9 6 2 1.7 2.7 3.6
1994 15 7.0 13 19 5.6 6.4 6.9 6 3.0 4.8 7.7
1995 15 6.9 11 5.9 7.1 8.9 6 1
1996 13 17 5.2 6.2 7.6 6 2.4 4.0 6.1
1997 17 6.9 12 4.3 6.2 8.2 11 1.9 3.5 5.4
1998 14 16.4 3.4 5.9 7.4 10 3.9 6.4 12.8
1999 16 21 2.8 5.4 7.6 13 3.4 5.5 14.5
2000 16 7.0 15 28 3.0 5.3 7.4 8 4.2 6.6 11.4
2001 16 7.0 16 24 2.8 6.2 8.8 6 1 2.5 5.3 12.6
2002 16 7.0 14 38 5.3 7.1 9.2 6 2 2.3 4.2 5.8
2003 18 7.1 14 3.6 6.0 8.3 9 2.4 5.4 10.8
2004 16 7.0 17 64 3.3 5.3 7.4 8 0.4 4.6 11.6
2005 14 7.0 15 160 2.3 4.3 6.3 7 3.3 7.4 15.4
2006 19 7.0 17 162 1.5 4.5 6.4 8 4.3 10.6 20.0
2007 8 18 86 7.1 16 77 1.8 4.4 7.3 7 2.5 8.5 18.0
2008 19 7.0 18 63 67.8 1.9 4.0 6.2 10 2.5 10.3 23.0
2009 19 16 46 37.1 1.9 4.4 7.8 9 2.9 7.5 18.0
2010 19 17 26 28.4 1.6 5.2 8.0 12 2.9 8.4 23.0
2011 19 16 45 38.5 1.5 4.5 8.0 13 2.4 9.4 32.0
2012 19 16 47 45.0 2.0 5.0 7.8 10 2.4 8.9 21.0
2013 20 13 13 26.6 3.9 6.3 8.7 11 1.8 4.3 9.5
2014 20 17 12 20.8 2.0 5.2 7.7 12 1.6 10.2 29.0
2015 20 17 15 39.1 2.0 4.8 7.2 9 3.5 9.6 20.0
2016 20 15 16 28.5 1.6 4.3 7.0 11 1.5 7.4 19.0
2017 20 16 14 14 34.7 2.2 4.2 7.7 12 3.4 10.3 18.0

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
8 17 56 7 15 15 45 26 0.8 5.6 9.2 8.3 0.4 7.2 93

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2017-08-07
2017-08-16
2017-08-25
2017-08-31
2017-09-07
2017-09-13
2017-09-21
2017-09-29
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 24 8.7 24 7.8 24 8.8 22 8.3 20 9.9 21 9.9 20 9.4 21 10.0
1 24 8.7 24 7.8 24 8.8 22 8.3 20 9.8 20 9.8 20 9.4 21 9.9
2 24 8.6 24 7.8 24 8.7 22 8.3 20 9.6 20 10.0 20 9.4 21 10.0
3 24 8.6 24 7.9 23 8.5 22 8.6 20 9.4 20 10.0 20 9.4 21 10.0
4 24 8.5 24 7.8 23 8.1 22 8.6 20 9.2 19 9.3 20 9.4 20 9.9
5 24 7.7 24 7.4 23 7.5 22 8.5 20 8.9 19 9.1 20 9.3 20 9.7
6 20 2.2 21 1.8 22 4.6 21 7.9 20 8.1 19 8.9 20 9.2 20 9.0
7 16 0.2 18 0.2 19 0.3 19 0.2 19 7.5 19 6.5 20 7.3 19 6.1
8 15 0.1 15 0.1 16 0.2 16 0.1 18 0.6 19 3.6 18 0.2 19 0.8

Recent temperature and dissolved oxygen profile plots

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