Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
DENMARK OXFORD 4 2 1.04 flushes/yr 418 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
21 m
(70 ft) 		6 m
(19 ft) 		345 ha
(852 ac) 		29,604,470 m3
(24,001 ac-ft) 		18 km2
(6.8 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 6.0 7.0 7.3 7.9 3 1.3 1.9 2.4
1977 4.0 43 5.0 8.8 6.0 6.5 7.0 3 3.0 3.0 3.0
1978 10.3 35 10.0 9 6.0 6.4 7.3 3 2.5 2.5 2.5
1979 5.0 6.6 8.0 5
1980 9.0 5.8 6.5 7.8 6
1981 7.0 32 10.0 9 5.5 6.8 7.8 4 2.1 2.1 2.1
1982 5.3 5.7 6.1 5
1983 5.0 5.0 6 5.5 6.5 7.0 5 1.8 2.4 3.8
1984 6.0 6.6 7.8 6
1985 5.5 7.1 9.0 7
1986 6.0 26 9.0 28 5.5 6.6 7.5 6
1987 6.0 7.1 8.0 5
1988 14.2 7.5 5.0 6.9 8.5 7
1989 4.0 6.0 7.8 6
1990 5.8 6.5 6.2 5.5 6.8 7.8 7
1991 6.7 5.0 6.7 5.8 6.9 8.2 7 2.1 2.1 2.1
1992 8.0 6.2 2.3 7.2 9.0 6
1993 7.0 7.0 4.0 7.3 4.0 7.4 9.3 5 1.2 1.2 1.2
1994 9.5 7.5 4.0 14 6.8 5.3 6.9 8.4 5
1995 9.2 7.0 6.0 6.8 6.2 8.4 9.6 6
1996 7.0 5.4 3.4 5.5 7.4 6 1
1997 6.2 6.4 7.6 8.5 7 2 1.5 3.1 5.1
1998 6.6 6.1 8.5 5.9 5.8 7.2 8.8 8 2.5 4.4 6.3
1999 5.7 6.6 5.7 7.0 4.6 7.5 8.5 7 1 2.0 2.9 3.8
2000 13.0 5.6 46 6.6 6.4 9.1 5.1 7.1 8.3 9 2.5 3.8 5.9
2001 10.0 8.0 50 6.9 4.9 10.0 7.5 8.4 10.3 8 1.2 2.1 3.8
2002 11.5 7.5 52 6.9 6.0 7.6 7.4 8.3 9.7 8 1.7 2.8 4.1
2003 14.1 7.3 43 6.6 5.4 8.5 5.9 7.7 8.7 7 1.5 2.8 3.8
2004 7.3 7.5 37 6.7 6.1 8.6 6.0 6.9 7.7 7 2.5 3.0 3.6
2005 11.4 6.9 36 6.7 5.4 7.0 5.0 7.0 8.5 8 1.8 2.8 4.8
2006 12.3 6.6 31 6.6 6.6 7.8 5.4 6.6 7.6 8 2.2 4.0 6.4
2007 10.4 6.6 29 6.7 6.3 7.4 5.6 7.5 8.6 8 2.2 3.1 4.8
2008 10.7 6.7 30 6.6 5.6 7.4 6.1 7.0 8.0 7 1.8 3.5 4.8
2009 11.4 8.5 31 6.7 5.6 6.7 5.4 6.6 7.8 7 1.8 2.9 6.1
2010 8.6 9.3 31 6.8 4.7 5.8 6.4 7.3 8.4 8 1.6 2.4 3.0
2011 11.2 8.1 30 6.7 6.3 6.7 4.8 7.1 8.4 6 1.3 2.2 2.9
2012 11.0 6.5 31 6.8 6.3 8.7 6.3 7.2 8.5 6 2.0 2.9 5.3
2013 11.5 6.8 33 6.7 5.2 7.9 6.0 7.3 8.2 7 1.6 2.5 3.1
2014 24.4 6.5 37 6.6 5.7 6.0 5.6 8.1 9.3 8 1.9 3.0 4.5
2015 21.7 7.3 42 6.7 4.2 6 5.8 8.3 9.2 6 1.7 2.6 4.3
2016 22.5 7.1 40 6.9 5.0 8.3 6.8 8.1 9.2 6 1.6 2.2 3.4
2017 19.9 6.9 41 6.8 5.8 5.6 6.3 7.4 8.8 6 1.8 3.2 4.6
2018 20.0 6.8 43 6.7 6.0 7.5 6.1 7.9 9.0 8 1.0 1.9 3.0

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
14 7.3 37 6.7 6.1 7.5 12 7.2 2.3 7.1 10 6.3 1 2.7 6.4

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2016-08-23
2016-09-12
2017-08-10
2017-08-29
2017-09-14
2018-08-09
2018-08-23
2018-09-12
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 23 8.2 23 8.3 23.7 8.4 22.2 8.5 20.2 8.9 27.0 8.1 23.7 8.1 21.9 8.5
1 23 8.2 23 8.3 23.7 8.3 22.3 8.5 20.1 8.9 27.0 8.1 23.9 8.1 21.9 8.5
2 23 8.2 23 8.3 23.7 8.3 22.4 8.5 20.1 8.9 27.0 8.1 23.9 8.1 21.9 8.5
3 23 8.2 23 8.3 23.7 8.3 22.4 8.4 19.7 8.9 26.7 8.1 23.9 8.1 21.9 8.5
4 23 8.2 23 8.2 23.7 8.3 22.4 8.4 19.6 8.9 26.4 8.1 23.9 8.0 21.9 8.4
5 23 8.1 23 8.2 23.4 8.2 22.4 8.4 19.4 8.8 25.6 8.1 23.9 8.0 21.9 8.4
6 23 8.1 23 8.2 22.3 8.1 22.3 8.3 19.2 8.7 23.6 7.8 24.0 8.0 21.9 8.4
7 23 8.1 23 8.1 17.6 7.4 19.8 7.4 19.0 8.5 19.2 7.5 21.0 7.2 21.9 8.4
8 20 7.0 22 7.4 14.1 6.5 15.1 5.6 18.6 8.0 16.4 6.4 16.6 6.0 19.6 7.3
9 17 5.7 19 4.7 13.0 6.4 13.5 5.1 15.0 4.7 13.9 6.1 14.6 4.9 15.7 4.5
10 15 4.8 16 3.7 12.0 5.9 12.2 5.1 13.2 4.3 12.6 5.7 13.3 4.6 13.6 3.7
11 14 4.3 14 2.9 11.3 5.9 11.3 4.7 12.1 3.9 11.5 5.3 11.7 4.6 12.1 3.3
12 13 3.7 13 2.4 11.0 5.8 10.6 4.5 11.5 3.8 10.8 5.1 10.3 4.1 11.0 3.1
13 12 3.4 12 2.1 10.4 5.6 10.2 4.1 11.0 3.5 10.1 5.1 9.9 4.1 10.2 3.0
14 12 3.3 11 1.8 10.1 5.4 9.9 3.8 10.7 3.5 9.7 4.8 9.6 3.8 9.9 2.8
15 11 2.8 11 1.5 9.8 5.2 9.7 3.7 10.4 3.2 9.5 4.8 9.4 3.5 9.7 2.7
16 11 2.7 11 1.4 9.7 5.0 9.6 3.4 10.2 3.0 9.3 4.6 9.3 3.4 9.4 2.5
17 11 2.7 11 1.4 9.6 4.9 9.6 3.4 10.1 2.9 9.1 4.3 9.2 3.2 9.3 2.4
18 11 2.7 11 1.1 9.5 4.8 9.6 3.4 10.0 2.9 9.1 4.3 9.1 3.1 9.3 2.3
19 11 2.6 11 1.1 9.5 4.7 9.5 3.3 10.0 2.7 9.1 4.2 9.1 3.1 9.2 2.2
20 11 2.6 11 1.1 9.4 4.5 9.5 3.0 9.8 2.6 9.1 4.2 9.1 2.9 9.2 2.1
21 11 2.4 11 0.9 9.4 4.4 9.5 0.3 9.0 4.1 9.0 2.5 9.2 2.0
22 11 0.8 11 0.7 9.0 4.0 9.0 2.4 9.2 2.0
23 11 1.0 9.0 3.9 9.0 2.4 9.2 1.9

Most recent temperature and dissolved oxygen profile plots

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