Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
EMBDEN SOMERSET 30 1 0.27 flushes/yr 416 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
48 m
(158 ft) 		18 m
(59 ft) 		627 ha
(1,549 ac) 		113,018,777 m3
(91,626 ac-ft) 		39 km2
(15 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
1970 9.9 10.2 10.8 4
1971 9.0 9.9 11.1 5
1972 6.9 8.9 11.6 6
1973 9.6 9.6 9.6 1
1976 9 7.9 7.9 7.9 1 2.3 2.3 2.3
1977 4 8.5 9.8 10.9 5
1978 8.5 9.7 12.2 6
1979 6.4 9.4 12.0 7
1980 6.0 35 6.0 10 8.8 10.0 10.9 6 1 1.0 1.0 1.0
1981 7.6 10.2 12.1 6
1982 10.4 10.5 10.6 3
1983 8.2 30 7.0 5 6.9 8.9 11.0 8 1.4 1.4 1.4
1984 7.3 8.3 9.0 5
1985 5.7 9.3 12.8 7
1986 8.0 22 7.0 3 7.7 10.9 13.0 5
1987 6.0 8.4 11.8 5
1988 5.0 3.0 4 7.2 9.4 12.2 7
1989 5.3 9.2 11.2 7
1990 7.8 9.6 11.2 7
1991 15.0 30 6.9 4.0 8.0 9.9 11.9 7
1992 8.3 10.1 11.1 5
1993 7.1 9.6 12.5 6
1994 6.5 9.2 11.3 6
1995 6.1 9.3 11.5 7
1996 6.1 8.2 10.1 6
1997 8.4 28 7.0 4.2 5 7.3 9.5 10.7 10 1.3 2.5 3.8
1998 8.5 7.0 5.0 4.9 8.1 10.3 6 1.9 1.9 1.9
1999 7.6 6.9 3.6 7.7 9.4 11.7 6 1.1 1.4 1.8
2000 8.2 9.3 11.3 5
2001 7.0 8.6 10.2 13.0 6
2002 7.0 4.0 9.2 10.6 12.9 6 2.3 2.3 2.3
2003 7.0 8.1 10.0 11.4 5
2004 6 11.0 31 7.0 4.0 8.0 8.6 9.4 5 2.3 2.3 2.3
2005 6.9 2.5 7.0 8.0 9.3 5
2006 7.0 4.6 5.8 7.7 9.6 5
2007 4.0 8.2 9.6 10.5 5
2008 10 7.0 27 6.9 3.5 7.6 8.4 9.1 5
2009 3.5 7.0 9.6 11.3 6
2010 3.3 8.0 9.8 10.8 5
2011 6.8 4.0 6.9 8.9 10.2 6
2012 6.8 3.0 5.0 8.5 10.3 7
2013 12 7.7 27 6.9 2.0 3.0 8.6 10.1 11.2 7 1.3 1.3 1.3
2014 7.5 9.2 9.9 4
2015 4.0 4 9.5 10.1 11.1 4 2.6 2.6 2.6
2016 10.1 10.5 11.5 3
2017 8.7 9.5 9.9 4
2018 5 10.0 31 7.5 8.0 7.6 9.8 11.1 4 1.0 1.0 1.0

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
8.2 8.5 29 7 4.8 3.5 5.5 4.9 9.4 13 5.5 1 1.8 3.8

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2015-09-15
2016-08-03
2016-08-16
2016-08-25
2017-08-03
2018-08-12
2018-08-16
2018-09-15
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 22.5 9.3 25.2 8.0 23.7 8.0 22.8 8.7 24.0 8.1 25.1 8.3 25.5 8.1 22.7 8.7
1 22.5 9.3 25.1 8.0 23.6 8.0 22.8 8.7 24.0 8.1 25.1 8.3 25.5 8.2 21.9 8.7
2 22.5 9.3 25.0 8.0 23.6 8.0 22.7 8.7 23.9 8.1 25.1 8.3 25.5 8.2 21.7 8.7
3 22.4 9.3 25.0 8.0 23.6 8.1 22.5 8.7 23.8 8.1 25.0 8.3 25.5 8.2 21.6 8.7
4 22.4 9.3 24.8 8.1 23.5 8.1 22.4 8.7 23.7 8.2 25.0 8.3 25.4 8.2 21.5 8.7
5 22.4 9.3 24.6 8.0 23.5 8.1 22.4 8.7 23.1 8.3 24.9 8.3 25.2 8.2 21.4 8.7
6 22.4 9.3 21.9 8.8 23.5 8.1 22.3 8.7 22.0 8.5 24.7 8.4 25.1 8.2 21.3 8.6
7 22.4 9.3 20.0 9.2 21.3 8.5 22.2 8.7 19.0 10.0 24.2 8.4 24.5 8.3 21.3 8.6
8 20.2 9.1 16.7 10.1 16.9 10.0 21.3 9.0 12.3 8.6 22.5 8.9 20.1 8.5 21.3 8.6
9 15.4 10.0 14.5 10.3 15.6 10.5 10.3 11.0 15.5 11.0 16.0 10.0 20.4 8.4
10 13.3 10.4 11.9 10.6 12.6 10.4 11.9 10.7 9.7 10.7 11.6 10.9 12.1 10.2 13.8 9.4
11 10.9 10.5 10.8 10.5 11.3 10.3 11.0 10.5 9.1 10.4 10.8 10.6 11.0 10.2 11.7 9.3
12 9.7 10.3 10.2 10.3 10.6 10.0 10.6 10.4 8.9 10.4 9.9 10.2 10.1 10.0 10.7 9.2
13 9.3 10.3 9.8 10.2 10.3 10.0 10.1 10.3 8.6 10.2 9.6 10.0 9.7 9.7 10.1 8.9
14 9.0 10.5 9.6 10.5 9.9 10.0 9.8 10.2 8.4 10.0 9.2 10.2 9.4 9.6 9.7 9.1
15 8.8 10.6 9.4 10.4 9.6 10.0 9.7 10.1 8.2 10.0 9.1 10.2 9.1 9.6 9.4 9.1
16
17 8.4 9.5
18
19 7.6 9.4
20 7.5 10.9 8.3 10.6 8.0 10.3 8.3 10.5 7.4 10.2 6.7 10.3 7.5 9.0
21 7.3 9.4
22
23 7.1 9.3
24
25 6.4 11.1 7.5 10.7 7.3 10.2 7.5 10.5 6.7 10.2 6.9 10.3 7.0 9.3 6.9 9.0
26
27
28
29
30 6.1 11.0 7.2 10.6 7.2 10.2 7.3 10.5 6.4 10.1 6.8 10.0 6.8 9.1 6.8 8.7
31
32
33
34
35 6.1 10.9 7.1 10.4 7.1 10.1 7.2 10.4 6.4 10.1 6.7 9.7 6.8 8.9 6.7 8.4
36
37
38
39
40 6.1 10.7 7.1 10.1 7.2 10.3 6.3 9.9 6.7 9.6 6.7 8.7 6.7 8.4
41
42
43
44
45 6.0 10.4 7.1 10.4 7.1 10.3 6.3 9.8 6.7 9.6 6.7 8.7 6.7 8.2

Most recent temperature and dissolved oxygen profile plots

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