Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
Oakland Kennebec 20 1 0.69 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
8 m
(27 ft)
5 m
(16 ft)
189 ha
(467 ac)
8,100,000 m3
(6,567 ac-ft)
10 km2
(3.8 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
1975 10.0 4.0 4.0 4.0 1 3.8 3.8 3.8
1976 11.5 4.3 4.5 4.7 2 3.7 3.7 3.7
1977 17 60 9.2 16.0 8.3 4.5 5.2 7.0 8 2.1 4.0 10.3
1978 18 74 21.0 9.7 12.5 3.5 5.1 6.7 8 2.1 2.8 3.4
1979 18 58 14.0 10 3.4 5.2 6.9 7 1.7 2.7 4.0
1980 15 64 2.3 4.3 6.9 7 1.8 3.1 4.6
1981 18 75 4.3 5.5 6.5 8 1 2.2 2.4 2.7
1982 4.5 5.2 6.0 6
1983 3.5 4.9 5.5 5
1984 2.5 4.5 6.0 6 5.2 5.2 5.2
1985 4.5 5.4 6.5 5
1986 4.0 4.9 6.0 6
1987 5.0 5.7 6.5 4
1988 5.0 6.0 7.0 5
1989 3.5 5.6 7.0 6
1990 24 77 7.6 7.0 4.0 6.6 7.5 5
1991 5.5 6.4 8.0 6
1992 5.0 6.8 8.0 6
1993 9.0 5.5 6.7 7.5 5
1994 4.6 5.7 6.9 6
1995 4.7 6.3 8.0 6
1996 12.0 5.3 6.1 6.9 5
1997 24 84 7.1 10.2 4.9 5.9 7.2 7 1 2.6 2.6 2.6
1998 8.8 4.4 6.4 7.2 4 3
1999 22 88 11.3 10.6 3.9 5.5 6.9 7 2.8 2.8 2.8
2000 11.6 11.1 3.8 5.4 6.4 6
2001 11.9 9.1 6.0 6.5 6.9 6 5
2003 11.3 11.0 5.0 5.7 6.5 3
2004 4.7 5.5 6.4 6
2005 8 24 93 7.7 7.0 4.9 6.1 6.7 6 2
2006 5.2 6.3 6.9 8 3
2007 7 26 86 7.7 9.0 7.0 5.7 6.5 7.0 7 4 2.4 2.4 2.4
2008 7.5 5.4 6.1 6.8 5 1
2009 7.0 5.5 6.0 6.8 5 2
2010 7.7 4.1 5.7 6.4 4
2011 9.0 5.5 6.3 7.0 5 5 3.2 3.2 3.2
2012 7 29 93 7.7 9.5 5.4 5.4 5.4 1 3.2 3.2 3.2
2013 11 29 91 7.6 8.0 6.8 6.8 6.8 1 1.7 1.7 1.7
2014 10 33 85 7.4 10.0 5.1 5.1 5.1 1 4.0 4.0 4.0
2015 10.0 6.1 6.5 7.0 2 3.9 3.9 3.9
2016 2 31 91 7.8 11.0 6.2 6.7 7.1 7 12 3.5 3.5 3.5
2017 5 29 91 7.9 9.0 6.4 7.0 7.2 7 14 1.9 1.9 1.9

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
7.2 24 81 7.6 11 9 10 10 2.3 5.8 8 5.3 1.7 3.2 10

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2007-08-15
2011-08-22
2012-09-04
2013-08-26
2014-08-14
2015-08-11
2016-08-18
2017-08-23
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 23 7.8 25 8.0 23 8.0 24 8.7 24 8.3 24 7.7 25 8.2 25 8.4
1 23 7.7 25 7.9 23 8.0 24 8.8 24 8.3 24 7.5 25 8.3 25 8.4
2 23 7.7 25 7.9 23 8.0 24 8.8 24 8.2 24 7.6 24 8.2 24 8.4
3 23 7.7 25 7.9 23 8.0 24 8.8 23 7.7 24 7.6 24 8.2 24 8.4
4 23 7.7 25 7.9 23 8.1 24 8.8 23 7.6 24 7.6 24 8.1 24 8.4
5 23 7.7 24 7.6 23 8.0 24 8.8 23 7.7 24 7.6 24 8.1 24 8.3
6 23 7.7 23 6.6 23 8.0 23 8.6 23 6.5 24 6.5 24 8.1 24 8.3
7 23 7.1 23 5.0 22 1.7 22 6.5 24 6.8

Recent temperature and dissolved oxygen profile plots

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