Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
MOUNT DESERT HANCOCK 16 1 0.17 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
46 m
(150 ft) 		24 m
(79 ft) 		72 ha
(178 ac) 		17,388,143 m3
(14,097 ac-ft) 		4 km2
(1.6 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
1981 3.0 25 4.5 10.0 14.5 3 0.6 0.60 0.6
1983 4.5 41 3.8 10.3 15.0 4
1984 5.8 10.0 13.0 6
1985 10.5 11.8 14.5 5
1986 7.0 8.4 9.5 3
1987 4.0 40 1.0 3 11.0 13.3 17.0 6
1988 11.0 13.8 17.0 6
1989 9.5 11.1 13.0 5
1990 9.5 30 6.9 2.0 11.0 13.3 16.6 5 1
1991 9.0 15.9 20.0 5
1992 12.1 15.8 18.6 6
1993 38 6.6 3 10.8 13.3 16.4 5
1994 36 6.5
1995 3.5 33 6.8 3.5 11.2 14.7 17.2 2
1996 3.0 38 6.6 4.0 11.2 13.4 16.0 4 0.6 2.37 4.4
1997 3.1 37 6.5 2.0 15.0 18.0 19.7 6 0.7 0.95 1.2
1998 2.8 35 6.4 2.5 14.1 15.2 16.1 5 0.9 1.05 1.2
1999 2.6 36 6.5 12.5 17.6 21.3 5
2000 3.0 38 6.6 2.5 12.5 14.0 16.7 7 0.4 0.75 1.1
2001 3.0 37 6.6 2.5 12.6 14.6 18.4 5 1.0 1.15 1.3
2002 3.2 37 6.5 6.0 11.0 13.3 15.6 7 0.8 0.80 0.8
2003 2.0 3.7 40 6.7 5.5 12.4 13.8 15.3 3 0.9 0.90 0.9
2004 3.3 38 6.8 5.0 10.2 12.2 14.1 4 0.7 0.70 0.7
2005 4.0 2.8 35 6.8 2.0 10.0 12.2 14.1 7 0.7 0.85 1.0
2006 3.0 33 6.4 9.9 12.0 15.0 7 0.6 0.90 1.2
2007 3.0 3.2 33 6.6 2.0 10.1 11.6 14.4 9 0.9 1.05 1.2
2008 4.0 3.1 32 6.6 4.0 7.8 11.8 15.5 6 0.6 1.05 1.5
2009 6.0 3.2 31 6.5 2.5 6.2 11.2 12.9 6 1.0 2.00 3.0
2010 5.0 3.4 32 6.5 3.0 11.3 13.7 17.5 8 0.5 0.50 0.5
2011 4.5 3.4 31 6.6 1.5 14.0 15.2 17.1 6 0.5 0.50 0.5
2012 4.0 3.6 31 6.6 3.0 11.8 13.4 15.2 7 0.5 0.86 1.2
2013 4.5 3.7 30 6.8 3.0 11.4 12.9 15.6 6 0.5 0.50 0.5
2014 4.0 3.9 32 6.6 2.0 12.8 14.0 15.4 5 0.9 0.90 0.9
2015 4.0 3.7 30 6.8 1.0 10.2 12.9 14.8 6 1.4 1.38 1.4
2016 3.0 3.9 31 6.3 3.2 10.1 12.8 14.9 8 0.7 0.80 0.9
2017 3.0 3.7 29 6.6 3.5 9.8 14.1 17.9 6 0.7 0.75 0.8

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
3.9 3.6 34 6.6 2.9 3 14 3.8 13 21 5.5 0.4 1 4.4

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2014-09-15
2015-08-20
2015-09-21
2016-08-18
2016-08-23
2016-09-26
2017-08-30
2017-09-25
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 17.7 9.3 24.1 8.3 19.8 8.8 22.5 8.6 22.4 8.9 17.9 9.4 20.6 8.9 19.8 9.2
1 17.7 9.3 24.1 8.3 19.8 8.8 22.5 8.6 22.4 8.9 17.9 9.4 20.7 8.9 19.7 9.2
2 17.7 9.3 24.2 8.2 19.8 8.8 22.5 8.6 22.4 8.8 17.9 9.4 20.7 8.9 19.6 9.2
3 17.7 9.3 24.1 8.2 19.8 8.8 22.5 8.5 22.3 8.9 17.9 9.4 20.7 8.9 19.5 9.2
4 17.6 9.3 23.1 8.5 19.8 8.8 22.5 8.5 22.2 8.8 17.9 9.3 20.7 8.8 18.9 9.3
5 17.6 9.3 22.6 8.6 19.8 8.8 22.5 8.5 22.0 8.8 17.9 9.3 20.7 8.8 18.7 9.3
6 17.6 9.3 22.3 8.6 19.8 8.8 22.5 8.5 22.0 8.8 17.9 9.3 20.6 8.8 18.7 9.3
7 17.6 9.3 21.8 8.7 19.8 8.8 22.5 8.5 22.0 8.8 17.9 9.3 20.6 8.8 18.6 9.3
8 17.5 9.3 20.9 8.9 19.8 8.8 22.4 8.5 21.9 8.8 17.9 9.3 20.6 8.8 18.6 9.3
9 17.5 9.3 19.0 9.7 19.8 8.9 20.9 9.2 21.4 9.3 17.9 9.3 20.2 8.9 18.5 9.3
10 17.5 9.3 16.4 10.6 17.6 9.9 16.9 11.1 19.6 10.1 17.9 9.3 18.0 10.4 18.4 9.3
11 17.0 9.7 13.0 11.7 15.3 11.3 12.6 12.2 16.0 11.5 17.9 9.3 13.0 11.8 18.0 9.4
12 13.1 11.7 10.4 12.5 12.3 12.2 10.9 12.5 12.7 12.2 16.2 11.0 11.1 12.1 13.5 11.6
13 10.1 13.0 9.0 12.8 9.9 12.8 9.9 12.7 11.0 12.5 11.4 12.5 10.2 12.2 11.2 12.2
14 8.5 13.4 8.2 12.9 8.9 13.0 8.7 12.8 9.5 12.5 9.8 12.8 8.8 12.3 9.4 12.3
15 7.2 13.4 7.6 12.8 7.9 13.0 8.2 12.8 8.6 12.6 8.0 12.4 8.6 12.4
16 6.2 13.6 7.0 12.9 7.3 12.9 7.6 12.7 8.0 12.6 8.2 12.7 7.5 12.4 7.7 12.3
17 5.6 13.4 6.6 12.9 6.6 12.7 7.2 12.8 7.5 12.5 7.7 12.6 7.1 12.3 7.1 12.3
18 5.4 13.4 6.3 12.9 6.4 12.5 7.0 12.5 7.4 12.3 6.8 12.2 6.7 12.1
19 5.1 13.3 6.1 12.8 6.0 12.4 6.8 12.3 7.0 12.2 7.1 12.3 6.5 12.1 6.5 12.0
20 5.0 13.3 5.9 12.6 5.9 12.3 6.7 12.2 6.9 12.2 6.4 12.0 6.4 11.9
21 4.8 13.1 5.8 12.5 5.8 12.2 6.6 12.1 6.8 11.9 6.7 12.0 6.3 11.9 6.3 11.8
22 4.8 12.9 5.7 12.4 5.7 12.1 6.5 12.0 6.6 11.9 6.2 11.8 6.2 11.6
23 4.7 12.7 5.6 12.3 5.6 12.1 6.4 11.9 6.6 11.6 6.5 11.7 6.1 11.7 6.1 11.4
24 4.5 12.6 5.5 12.3 5.5 11.9 6.4 11.8 6.4 11.5 6.0 11.6 6.1 11.3
25 4.5 12.5 5.5 12.2 5.4 11.8 6.3 11.8 6.4 11.4 6.4 11.3 6.0 11.6 6.0 11.2
26 4.4 12.4 5.3 12.2 5.4 11.7 6.3 11.7 6.3 11.1 5.9 11.4 5.9 11.1
27 4.4 12.4 5.2 12.1 5.3 11.6 6.2 11.6 6.2 11.0 5.7 11.3 5.8 11.1
28 4.3 12.3 5.2 11.9 5.2 11.5 6.1 11.6 6.1 11.0 5.7 11.2 5.7 10.9
29 4.2 12.1 5.1 11.8 5.2 11.5 6.1 11.5 6.1 10.9 5.7 11.2 5.7 10.9
30 4.2 12.1 5.1 11.7 5.2 11.3 6.0 11.4 6.0 10.7 6.1 10.9 5.6 11.1 5.6 10.7
31
32
33
34
35 5.9 10.0
36
37
38
39
40 5.9 9.5
41
42
43
44
45 5.8 8.7

Recent temperature and dissolved oxygen profile plots

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