Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
BAR HARBOR HANCOCK 16 1 1.88 flushes/yr 331 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
12 m
(39 ft) 		5 m
(16 ft) 		13 ha
(32 ac) 		641,427 m3
(520 ac-ft) 		2 km2
(0.7 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 7.5 8.5 9.5 2
1983 7.8 39 5.0 8.7 10.1 11.5 5 1.5 1.5 1.5
1984 7.9 8.9 10.0 5
1985 11.5 11.5 11.5 1
1986 6.4 33 3.0 6.5 7.5 11.5 2
1987 7.0 8.1 10.0 3
1988 7.5 9.5 10.5 6 2
1989 7.5 8.6 9.5 5
1990 9.0 28 6.5 4.0 8.0 10.4 12.2 5
1991 9.5 10.9 12.7 5 2
1992 6.0 9.4 12.5 5 2
1993 37 6.5 2 7.5 10.5 13.5 5 2
1994 35 6.4 9.5 9.5 9.5 1
1995 4.5 31 6.3 10.9 10.9 10.9 1
1996 2.9 36 6.5 4.0 8.2 10.4 12.1 4 1 1.4 1.9 2.4
1997 3.7 36 6.4 7.6 9.2 11.1 5
1998 2.9 30 6.5 6.7 8.7 10.0 6
1999 2.1 37 6.4 8.3 9.1 9.8 2 1
2000 2.4 40 6.5 9.2 10.6 11.8 4 2
2001 4.1 37 6.6 10.0 11.9 13.8 3 2
2002 3.0 36 6.4 8.0 10.4 12.5 4 2
2003 3.8 39 6.7 10.2 10.2 10.2 1
2004 3.5 37 6.8 7.1 9.3 10.2 3
2005 10.0 2.4 27 6.6 5.5 8.0 10.0 6
2006 2.8 31 6.3 4.0 7.5 9.2 10.9 7 1.3 1.4 1.6
2007 4.5 3.4 36 6.7 3.5 8.3 9.9 11.1 6 1.0 1.2 1.5
2008 11.0 3.6 36 6.6 4.0 5.1 7.7 10.5 6 1.1 1.4 1.8
2009 13.0 3.3 31 6.4 5.5 5.2 6.7 7.9 6 1.0 1.7 2.4
2010 6.5 3.5 33 6.5 4.5 7.5 8.6 9.4 7 1.5 1.6 1.6
2011 7.0 3.8 32 6.6 3.5 7.9 8.7 9.3 6 1.9 2.1 2.3
2012 8.0 3.9 34 6.5 3.7 6.8 7.4 8.1 7 1.9 2.3 2.6
2013 6.0 3.7 32 6.8 2.0 6.8 8.4 10.6 6 0.5 1.2 2.0
2014 7.5 3.9 31 6.6 4.0 7.0 8.2 11.3 6 2.6 2.8 3.1
2015 5.0 3.4 29 6.8 3.0 7.2 8.9 10.0 5 1.0 1.3 1.5
2016 3.3 36 6.6 4.0 8.8 10.7 12.4 6 2 1.0 1.4 1.7
2017 4.0 3.6 33 6.6 4.0 8.2 9.3 10.3 6 1.4 1.6 1.7
2018 5.5 4.9 34 6.7 4.5 6.8 8.3 9.9 6 2.3 3.1 4.0

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
7.3 3.9 34 6.5 3.9 2 5.1 9.3 14 4.6 0.5 1.8 4

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2012-08-30
2013-08-28
2014-08-26
2014-09-15
2015-08-20
2016-08-18
2017-08-30
2018-08-21
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 22 8.1 22 8.6 21 8.8 18 9.1 24 8.2 23 8.3 21 8.7 23 8.2
1 22 8.1 22 8.7 21 8.8 18 9.1 24 8.2 23 8.3 21 8.6 23 8.2
2 22 8.1 22 8.7 21 8.8 18 9.1 24 8.2 23 8.3 21 8.6 23 8.2
3 22 8.0 22 8.7 20 8.8 18 9.1 24 8.2 23 8.3 21 8.6 23 8.2
4 22 8.0 22 8.7 20 8.7 18 9.1 23 8.4 23 8.3 21 8.6 23 8.1
5 22 8.0 20 7.8 20 8.6 18 9.1 22 8.4 23 8.3 21 8.6 23 8.1
6 22 8.0 20 8.0 20 8.0 18 9.0 22 8.4 23 8.2 21 8.6 23 8.1
7 22 8.1 20 7.3 20 7.7 17 9.1 22 8.1 23 8.3 21 8.6 23 8.1
8 22 8.0 19 6.3 19 7.3 17 9.0 21 7.6 23 8.2 21 8.5 23 7.8
9 17 1.4 16 2.2 19 7.0 17 9.0 19 5.1 23 8.2 21 8.4 22 7.1
10 16 0.4 15 1.1 19 6.7 17 9.0 18 3.4 23 8.1 21 7.9 19 1.0
11 15 0.0 15 0.8 19 6.5 17 9.0 18 2.6 23 8.1 17 2.1 18 0.2
12 14 0.4 19 3.0 17 1.2 15 0.7 17 0.1

Most recent temperature and dissolved oxygen profile plots

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