Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
DENMARK OXFORD 4 1 0.79 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
18 m
(59 ft) 		6 m
(18 ft) 		308 ha
(761 ac) 		17,353,184 m3
(14,068 ac-ft) 		11 km2
(4.2 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 5.2 7.3 8.5 4
1976 9.2 23 5.0 6.5 5.8 7.2 7.9 6 2.8 2.8 2.8
1977 5.0 6.1 7.3 8.4 4
1978 7.6 8.1 9.1 5
1979 6.9 7.8 9.0 3
1980 5.0 27 4.0 12.0 7.3 8.3 9.5 5 1.8 1.8 1.8
1981 6.1 7.8 9.4 4
1982 7.3 7.6 7.9 4
1983 4.0 3.0 7.0 6.6 7.5 8.4 4 1.4 1.4 1.4
1984 6.4 6.9 7.8 5
1985 7.3 7.7 8.2 5
1989 6.5 7.0 7.7 2
1990 6.5 42 6.6 6.0 8.0 8.1 8.1 2
1991 6.0 27 6.9 6.0 7.5 7.7 8.1 2 2.3 2.3 2.3
1992 9.0 11.0 7.2 7.4 7.7 2 3.3 3.3 3.3
1993 5.2 6.4 4.0 10.0 6.4 7.8 8.5 5 2.5 2.5 2.5
1994 6.0 6.5 5.0 17.0 6.9 6.9 6.9 2
1995 7.3 7.0 5.5 6.9 5.8 7.5 10.4 6
1996 6.2 6.8 6.1 6.5 7.2 7.7 7 3.0 3.0 3.0
1997 5.0 33 6.9 3.0 9.5 13.9 4.6 7.0 7.8 8 2.9 3.6 4.3
1998 5.8 6.4 7.0 6.7 6.1 6.4 7.1 3 5.2 6.2 7.1
1999 4.8 6.6 6.0 7.6 5.3 6.9 7.8 6 2.5 3.7 5.0
2000 12.8 4.3 43 6.7 5.6 11.8 5.9 6.8 7.8 8 2.7 3.6 4.6
2001 8.7 6.6 36 6.8 5.5 10.1 6.2 7.6 9.0 7 1.4 2.3 3.5
2002 9.9 5.6 39 6.7 6.1 11.2 6.8 7.4 8.1 6 2.1 3.5 5.9
2003 11.3 6.4 32 6.7 5.4 9.0 6.4 7.5 8.5 5 1.3 2.4 3.7
2004 14.5 5.5 26 6.6 5.3 11.2 5.9 7.1 8.4 6 1.6 3.5 5.2
2005 16.9 6.4 27 6.8 6.2 9.5 5.6 6.6 7.3 8 1.8 2.8 3.8
2006 13.1 5.3 24 6.6 6.6 8.2 5.4 6.6 7.4 6 1.7 3.0 4.8
2007 11.1 5.8 23 6.6 6.0 8.8 6.3 7.2 8.1 5 1.6 2.9 4.0
2008 7.4 6.2 23 5.1 9.4 6.2 6.8 7.6 6 1.2 2.6 4.8
2009 11.1 7.0 23 6.7 5.2 7.6 6.2 7.0 7.5 6 1.7 2.8 4.2
2010 7.4 8.2 24 6.7 6.0 11.4 6.4 7.1 7.9 8 1.4 3.3 4.3
2011 10.6 7.2 22 6.8 6.4 8.8 6.6 7.1 7.8 5 1.5 2.8 4.1
2012 11.1 5.4 22 6.6 6.2 9.3 5.6 6.7 8.9 6 1.3 3.2 4.9
2013 9.8 5.2 24 6.7 7.5 8.3 6.6 7.4 8.5 6 1.6 2.8 4.4
2014 20.0 4.9 25 6.6 5.0 6.6 6.8 7.3 8.1 5 1.4 2.4 3.7
2015 19.0 6.0 27 6.8 6.1 7.8 6.7 7.5 8.5 6 1.4 2.6 4.0
2016 21.9 6.2 28 6.8 5.2 10.8 7.0 7.8 8.9 6 1.0 2.2 4.2
2017 21.9 6.0 26 6.8 5.5 7.8 5.7 7.0 8.0 12 2.1 3.0 4.0

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
13 6 28 6.7 5.6 11 9 4.6 7.3 10 5.3 1 2.9 7.1

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2015-08-26
2015-09-08
2016-08-02
2016-08-18
2016-09-07
2017-08-02
2017-08-18
2017-09-07
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 24.8 8.2 25.4 8.0 25.2 8.3 24.7 8.3 23.1 8.5 25.2 8.5 23.6 8.5 19.6 8.6
1 24.9 8.2 25.4 8.0 25.4 8.3 24.7 8.3 23.2 8.5 25.1 8.5 23.7 8.4 19.8 8.6
2 24.9 8.2 25.3 8.0 25.5 8.2 24.6 8.3 23.2 8.4 25.0 8.5 23.7 8.4 19.8 8.6
3 24.9 8.1 25.0 8.0 25.4 8.2 24.6 8.3 23.2 8.4 24.3 8.5 23.7 8.4 19.9 8.6
4 24.9 8.1 24.8 8.0 25.5 8.2 24.6 8.3 23.2 8.4 23.8 8.4 23.7 8.4 19.9 8.6
5 24.9 8.0 24.7 8.0 25.2 8.2 24.6 8.2 23.1 8.4 21.4 8.8 23.4 8.2 19.9 8.6
6 21.7 9.1 23.1 8.5 21.7 9.2 23.6 8.3 23.0 8.3 16.1 8.6 19.0 8.7 19.4 8.3
7 17.2 8.9 16.3 7.6 17.9 8.6 19.3 8.4 20.4 7.0 12.8 7.3 13.9 7.0 17.7 7.3
8 13.4 7.3 13.9 7.0 14.8 7.1 15.6 6.2 16.8 5.0 11.2 6.2 11.4 6.0 13.0 5.4
9 11.2 6.4 12.1 6.1 12.6 6.0 13.1 5.1 13.4 3.9 9.8 5.8 9.9 4.7 10.7 4.3
10 9.5 5.3 9.7 4.6 11.3 5.1 11.3 3.9 11.7 2.6 8.8 5.5 9.2 4.5 9.6 3.6
11 8.6 4.5 8.7 3.5 10.1 4.7 10.3 2.8 10.8 1.8 8.3 5.1 8.6 4.1 8.8 2.7
12 8.2 3.1 8.2 2.2 9.5 3.3 9.8 2.0 10.1 0.8 8.0 4.4 8.2 3.3 8.5 2.7
13 7.9 2.9 8.0 2.0 9.3 2.7 9.6 1.6 9.7 0.5 7.9 4.1 7.9 3.1 8.2 1.8
14 7.7 2.4 7.8 1.7 9.0 2.1 9.3 1.3 9.3 0.4 7.8 4.0 7.8 2.7 8.2 1.5
15 7.6 1.9 7.8 1.7 8.8 1.6 9.0 1.1 9.1 0.4 7.6 3.5 7.7 2.3 7.8 1.3
16 7.6 1.4 7.6 1.0 8.7 1.3 8.9 0.9 8.9 0.4 7.5 2.6 7.6 1.8 7.7 0.7
17 7.5 1.0 7.5 0.7 8.6 0.8 8.6 0.3 7.5 1.8 7.6 1.2 7.6 0.4
18 7.5 0.7 7.4 0.1 8.5 0.6

Recent temperature and dissolved oxygen profile plots

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