Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
MOUNT DESERT HANCOCK 16 1 0.32 flushes/yr 59 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
34 m
(113 ft) 		11 m
(36 ft) 		304 ha
(751 ac) 		33,369,769 m3
(27,053 ac-ft) 		13 km2
(5 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
1977 6.0 8.1 10.0 5
1980 6.0 7.7 9.5 6
1981 3.0 35 7.0 9 6.5 7.8 10.0 3 3.0 3.0 3.0
1982 6.8 8.1 9.0 3
1983 6.5 7.3 8.2 3
1984 2.5 5.0 7.8 9.5 6 2.5 2.5 2.5
1985 7.3 8.4 9.5 5
1986 5.8 7.5 8.0 3
1987 2.0 40 3.0 6 6.5 9.4 11.5 4
1988 9.0 10.8 12.0 6
1989 7.5 8.6 11.0 5
1990 7.5 36 6.3 3.0 8.5 10.2 13.0 5
1991 9.0 11.0 12.7 5
1992 8.7 10.8 12.9 5
1993 9.0 10.1 11.2 3
1995 5.0 45 6.5
1997 8.4 9.9 11.5 7
1998 91 6.2 8.5 10.2 12.2 5
2000 9.3 10.3 11.2 2
2001 5.7 48 6.8 8.8 10.2 11.3 3
2002 2.6 49 6.5 8.8 9.4 9.9 3
2004 2.5 55 6.8 8.5 8.8 8.9 2
2005 2.4 47 6.6 6.8 8.4 9.9 6
2006 2.7 47 6.2 9.0 10.0 11.1 6 1.6 1.6 1.7
2007 9.5 2.8 45 6.5 3.0 7.3 8.7 10.6 6 2.3 2.8 3.3
2008 11.0 2.7 44 6.3 4.5 7.0 8.6 11.2 6 2.1 2.4 2.6
2009 14.0 2.7 44 6.2 5.0 5.6 8.2 10.1 6 1.8 2.1 2.5
2010 12.5 3.0 40 6.3 4.0 6.8 8.2 9.2 6 2.6 2.6 2.6
2011 12.5 3.0 42 6.3 3.5 7.2 8.4 9.5 6 1.6 2.2 2.9
2012 10.0 3.2 43 6.2 2.7 7.3 8.8 9.6 6 1.9 2.3 2.7
2013 11.0 3.4 41 6.7 3.5 7.6 9.5 12.6 6 2.5 2.6 2.7
2014 9.0 3.6 43 6.3 4.0 7.6 9.4 10.3 6 1.3 1.9 2.6
2015 8.0 4.0 41 6.8 4.0 7.9 9.9 12.6 6 2.1 2.6 3.1
2016 7.0 4.1 44 6.0 4.0 8.5 10.4 11.9 7 1.8 1.9 2.0
2017 6.0 3.7 45 6.4 5.0 8.4 10.0 11.5 6 1.4 1.6 1.9
2018 8.0 3.8 46 6.6 3.0 9.7 10.7 12.0 6 1.8 1.8 1.8

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
9.9 3.4 46 6.4 3.9 7.5 5 9.2 13 5 1.3 2.3 3.3

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2012-08-22
2013-08-27
2014-08-20
2015-08-17
2016-08-15
2016-08-29
2017-08-28
2018-08-30
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 24.4 8.6 22.6 8.7 21.9 8.9 24.4 8.6 24.1 8.5 22.8 8.7 21.8 8.7 24.2 8.4
1 24.3 8.6 22.3 8.7 21.0 9.0 24.4 8.6 24.0 8.5 22.6 8.7 21.8 8.7 24.2 8.4
2 24.0 8.6 21.6 9.0 20.6 9.0 23.7 8.7 23.9 8.5 22.4 8.7 21.8 8.7 24.2 8.4
3 23.7 8.6 22.0 8.8 20.5 8.9 23.5 8.7 23.9 8.5 22.4 8.7 21.8 8.7 24.1 8.4
4 23.5 8.5 21.9 8.7 20.4 8.9 22.9 8.8 23.5 8.5 22.2 8.6 21.7 8.6 24.1 8.4
5 22.8 8.2 21.7 8.7 20.4 8.9 22.5 8.7 23.4 8.4 22.1 8.6 21.7 8.6 24.0 8.4
6 22.3 8.1 21.5 8.7 20.3 8.9 22.1 8.7 23.3 8.4 22.1 8.6 21.7 8.6 23.9 8.4
7 21.9 7.9 21.4 8.6 20.3 8.9 21.7 8.7 23.2 8.4 22.0 8.6 21.7 8.6 23.4 8.4
8 20.7 7.5 21.2 8.5 20.2 8.8 21.1 8.4 22.9 8.4 22.0 8.6 21.6 8.5 23.2 8.3
9 18.9 7.3 17.9 7.7 19.6 8.5 19.4 8.0 21.2 8.2 21.9 8.5 21.4 8.3 23.1 8.3
10 17.0 7.3 15.7 7.5 18.9 8.2 17.0 8.0 18.6 8.0 21.9 8.5 20.4 8.0 21.5 7.8
11 15.0 7.7 14.4 7.6 14.7 8.0 15.9 8.0 17.2 7.9 21.6 8.4 17.3 7.4 17.8 6.8
12 13.8 7.9 13.4 7.9 13.7 7.9 14.8 8.2 16.2 7.9 17.7 7.5 15.5 7.4 16.1 6.8
13 13.1 8.1 12.5 8.1 12.8 8.2 13.9 8.4 15.0 8.1 15.5 7.7 13.9 7.6 15.2 6.9
14 12.6 8.2 11.8 8.4 11.7 8.5 13.4 8.5 13.1 8.2 14.6 7.8 12.3 7.9 14.0 7.4
15 12.1 8.4 11.0 8.7 10.9 8.8 12.7 8.7 11.9 8.7 13.5 7.9 11.4 8.2 13.1 7.7
16 11.7 8.6 10.8 8.7 10.4 8.9 12.1 8.9 11.0 8.9 10.6 8.5 12.8 7.8
17 11.2 8.7 10.4 8.9 9.9 9.1 11.5 9.0 10.6 9.0 10.9 8.5 9.7 8.7 12.3 8.0
18 11.0 8.8 10.0 9.0 9.7 9.1 11.2 9.1 10.2 9.1 9.3 8.9 11.6 8.2
19 10.7 8.8 9.2 9.3 9.2 9.3 10.6 9.2 9.9 9.2 10.0 8.7 9.1 8.9 11.1 8.4
20 10.4 8.9 9.0 9.4 9.0 9.4 10.3 9.3 9.7 9.1 8.9 8.9 10.3 8.6
21 10.2 9.0 8.7 9.4 8.8 9.4 10.0 9.4 9.6 9.1 9.6 8.6 8.7 8.9 9.7 8.7
22 10.0 9.1 8.5 9.5 8.4 9.4 9.4 9.5 9.5 9.1 8.6 9.0 9.5 8.7
23 9.9 9.0 8.2 9.2 8.4 9.5 9.0 9.5 9.4 9.0 9.5 8.5 8.5 8.9 9.2 8.7
24 9.7 8.9 8.2 9.2 8.2 9.5 8.8 9.4 9.3 9.1 8.4 8.9 9.1 8.6
25 9.7 8.9 8.1 9.2 8.1 9.5 8.7 9.3 9.2 9.0 9.3 8.3 8.4 8.8 9.0 8.4
26 9.7 8.8 8.1 9.2 8.0 9.5 8.6 9.3 9.2 9.0 8.3 8.7 8.9 8.3
27 9.6 8.7 8.0 9.1 7.8 9.3 8.6 9.2 9.2 8.8 8.3 8.7 8.9 8.2
28 9.6 8.5 8.1 9.1 7.8 9.2 8.6 9.2 9.1 8.9 8.3 8.6 8.8 8.1
29 9.6 8.5 8.0 9.1 7.7 9.1 8.5 9.1 9.1 8.8 8.2 8.4 8.8 8.0
30 9.5 8.4 8.0 9.0 7.7 9.0 8.5 9.1 9.1 8.6 9.2 8.0 8.2 8.3 8.8 7.6
31
32
33
34
35 9.0 7.1

Most recent temperature and dissolved oxygen profile plots

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