Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
MONMOUTH KENNEBEC 12 1 3.67 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
12 m
(40 ft) 		5 m
(17 ft) 		563 ha
(1,391 ac) 		29,470,000 m3
(23,892 ac-ft) 		43 km2
(17 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 29 1.1 2.6 4.1 7 2 4.3 18.2 35.0
1977 28 29 31 0.8 2.2 4.0 7 16.4 33.0 65.4
1978 18 25 29 22 1.4 2.9 4.8 9 8.7 14.9 23.4
1979 12 25 2.0 3.9 5.5 11 4.3 8.1 15.8
1980 13 14 25 1.6 3.3 4.8 8 3.3 11.1 22.1
1981 23 1.5 3.5 5.8 8 2.4 12.1 30.1
1982 26 31 22 1.1 3.1 5.0 8 4.1 14.3 42.8
1983 26 0.6 2.8 4.7 10 5.5 15.5 74.2
1984 52 33 1.1 2.9 4.2 7 6.0 19.1 49.0
1985 63 24 0.9 3.0 5.1 8 3.8 15.9 31.7
1986 18 1.7 3.3 4.0 5 2.4 10.0 22.5
1987 1.5 26 1.0 2.9 4.4 7 4.3 17.9 43.1
1988 13.0 20 32 20 1.0 3.1 5.0 7 2.0 9.5 16.0
1989 2.7 4.4 6.6 6
1990 17.6 7.1 18 24 1.0 3.0 4.7 6
1991 16.5 7.1 22 1.4 3.2 5.2 5
1992 16.7 7.1 1.9 3.2 5.0 6
1993 17.3 7.0 21 1.5 3.2 4.5 6
1994 16.1 7.0 20 2.2 3.8 5.5 6
1995 15.0 6.9 17 2.0 4.0 5.2 6
1996 19 1.9 3.5 4.8 5
1997 22 1.0 3.1 5.0 6
1998 19 2.2 4.1 5.2 6 3.6 10.6 22.6
1999 20 1.4 3.6 5.2 6 5.7 13.9 31.1
2000 16.2 7.0 23 2.4 4.0 5.8 6 4.0 8.2 17.4
2001 16.1 7.0 21 17 1.6 4.3 6.5 6 1 2.3 10.8 26.5
2002 16.1 6.9 16 2.2 4.7 6.2 6 3.2 7.4 11.2
2003 17.4 7.1 13 2.3 5.0 6.4 7 3.6 6.3 17.7
2004 14.8 7.0 16 1.9 4.5 6.6 6 2 2.9 6.5 17.1
2005 10.0 7.0 14 3.6 5.0 6.5 6 2 3.0 4.4 6.4
2006 17.8 7.0 14 2.2 4.4 6.2 6 3.1 9.0 18.0
2007 19.0 7.1 14 2.2 4.3 6.3 6 2 3.1 5.8 14.0
2008 18.8 7.0 12 2.4 4.4 6.3 7 2 3.0 6.8 12.0
2009 20.2 15 2.2 3.8 5.6 7 2.6 7.7 14.0
2010 20.6 20 1.2 3.8 5.9 6 3.0 13.0 38.0
2011 18.6 18 2.0 3.8 5.3 6 3.5 9.6 17.0
2012 19.9 17 1.4 4.4 5.8 9 2.9 12.1 38.0
2013 21.0 16 3.0 4.0 5.2 9 4.6 7.1 11.0
2014 19.9 19 2.2 3.8 6.0 11 3.1 9.1 14.0
2015 19.6 16 2.4 3.8 6.2 9 5.4 9.2 15.0
2016 21.4 19 2.0 4.3 6.1 11 1.6 7.2 20.0
2017 20.3 16 2.0 4.0 6.2 11 2.7 10.1 20.0

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
17 58 7 18 24 23 22 0.6 3.7 6.6 7.2 1.6 11 74

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2016-08-03
2016-08-17
2016-08-31
2016-09-14
2016-09-29
2017-08-15
2017-08-30
2017-09-12
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 27 8.3 25 8.5 24 9.1 23 10.1 18 9.6 25 9.1 22 9.2 20 9.2
1 26 8.5 25 8.5 24 9.2 23 9.2 18 9.5 25 9.0 22 9.2 20 9.6
2 26 8.6 25 8.5 24 8.7 23 9.1 18 9.5 25 8.8 22 9.1 20 8.9
3 26 8.4 25 8.5 24 8.1 23 8.8 18 9.5 24 8.7 22 9.0 19 8.0
4 26 8.2 25 8.6 24 7.7 23 8.7 18 9.4 24 8.3 22 8.9 19 8.0
5 25 7.5 25 8.4 24 5.8 22 7.9 18 9.4 24 7.0 22 8.5 19 8.0
6 23 1.0 24 7.4 23 0.7 22 3.0 18 9.5 23 3.9 22 4.7 19 7.5

Recent temperature and dissolved oxygen profile plots

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