Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
MOUNT DESERT HANCOCK 16 1 4.12 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
14 m
(47 ft) 		4 m
(11 ft) 		15 ha
(37 ac) 		527,236 m3
(427 ac-ft) 		3 km2
(1.3 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
1989 5.9 6.5 7.8 5
1992 5.3 6.0 6.3 3
1993 6.3 7.0 7.6 3
1994 38 6.2 4.7 5.9 6.5 5
1995 4.1 36 6.2 6.0 12 5.4 6.0 8.8 6 2.7 2.7 2.7
1996 2.4 40 6.0 5 4 5.1 6.0 7.7 5 2.0 3.4 4.9
1997 42 6.4 4.5 5.7 6.3 6.9 5 3.2 3.4 3.7
1998 42 6.2 6.0 5 6.1 6.4 6.8 4 1.2 2.4 3.6
1999 48 6.3 5.1 6.2 6.8 5
2000 48 6.2 5.5 4.9 6.3 8.2 5 2.9 2.9 2.9
2001 3.2 56 6.5 4.0 12 6.7 7.8 9.4 4 2.2 3.1 4.0
2002 2.8 51 6.2 11.0 6.5 7.3 8.2 5 1.4 1.4 1.4
2003 2.1 61 6.4 6.0 4 5.2 6.6 8.1 5 1.6 3.1 4.7
2004 3.2 58 6.6 4 4.9 7.1 8.3 5 1.0 1.0 1.0
2005 11 2.5 34 6.2 3.0 8 5.4 6.3 7.3 6 0.8 1.2 1.7
2006 2.5 42 5.8 4.0 5.4 7.3 9.6 7 0.8 1.5 2.2
2007 9 2.4 51 6.4 4.5 5.5 6.8 7.7 6 1.2 1.8 2.4
2008 19 2.1 57 6.0 7.5 3.3 5.0 6.5 6 2.2 4.0 5.8
2009 21 2.4 42 5.9 7.0 5.0 6.1 7.5 6 1.0 1.0 1.0
2010 19 2.4 38 6.1 6.0 5.4 6.3 7.9 8 1.4 3.2 5.0
2011 19 2.8 47 6.0 6.0 6 5.6 6.4 7.1 6 1.0 3.0 5.0
2012 18 3.4 37 5.9 5.7 6 4.7 5.8 6.9 6 2.3 2.5 2.6
2013 12 2.5 44 6.5 5.5 5.9 6.5 7.7 6 1.7 2.0 2.3
2014 16 2.8 46 5.8 5.0 5.2 6.8 7.9 6 1.2 1.5 1.8
2015 14 2.8 44 6.6 4.0 5.8 7.4 8.3 6 1.6 1.7 1.7
2016 9 2.4 59 5.9 4.0 6.9 8.1 10.0 7 1.9 2.2 2.5
2017 6 3.5 54 6.0 6.0 5.2 6.1 7.2 6 2.5 2.8 3.1

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 2.8 46 6.1 5.6 6.3 7.2 3.3 6.5 10 5.4 0.8 2.4 5.8

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2014-08-18
2014-09-17
2015-08-19
2015-09-22
2016-08-25
2016-09-22
2017-08-23
2017-09-22
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 20.4 8.7 17.1 9.1 25.8 8.2 19.9 8.5 23 8.5 21 8.9 22.7 8.2 19.5 8.9
1 20.4 8.6 16.8 9.2 25.8 8.2 19.9 8.5 23 8.5 20 8.9 22.7 8.3 19.5 8.9
2 20.3 8.6 16.6 9.1 25.5 8.3 19.8 8.5 23 8.4 20 8.9 22.7 8.3 19.5 8.9
3 20.2 8.6 16.4 9.1 23.9 8.4 19.7 8.4 23 8.3 20 8.8 22.6 8.2 19.5 8.9
4 18.6 5.8 16.3 9.1 22.7 8.3 19.5 8.2 22 8.2 20 8.6 22.0 7.9 19.4 8.8
5 15.3 4.1 16.1 9.0 19.5 9.5 19.4 8.2 22 8.2 20 8.5 19.3 6.5 19.3 8.7
6 12.7 4.5 16.0 8.8 15.3 6.7 19.2 8.1 22 7.9 19 8.3 13.5 5.0 18.7 8.3
7 10.2 4.7 10.7 4.1 12.4 4.0 14.9 2.5 16 3.2 19 7.9 10.2 1.7 13.3 2.4
8 8.7 3.9 9.2 2.0 10.9 3.1 11.2 1.4 14 1.1 17 3.0 9.2 0.3 9.9 0.4
9 8.2 3.0 8.4 0.9 9.9 2.6 10.1 0.3 13 0.3 13 0.3 8.8 0.2 8.9 0.3
10 7.9 2.5 8.1 0.4 9.5 2.2 9.7 0.2 12 0.2 12 0.3 8.5 0.2 8.7 0.2
11 7.8 2.3 8.0 0.3 9.3 1.9 9.4 0.1 12 0.2 12 0.3 8.4 0.1 8.6 0.2
12 7.7 2.0 8.0 0.2 9.2 1.7 9.4 0.1 12 0.3 8.3 0.1 8.5 0.2
13 7.7 1.6

Recent temperature and dissolved oxygen profile plots

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