Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
BAR HARBOR HANCOCK 16 1 0.26 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
34 m
(110 ft) 		13 m
(42 ft) 		177 ha
(437 ac) 		22,399,242 m3
(18,159 ac-ft) 		6 km2
(2.2 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 4.0 7 8.8 11.0 14 4 1.8 1.80 1.8
1983 10.5 11.2 12 3
1984 7.5 9.9 12 6 1.4 1.40 1.4
1985 8.0 10.2 12 5
1986 4.0 40 4.0 7.5 8.8 10 4
1987 9.0 11.0 13 5
1988 9.3 10.8 12 6
1989 8.5 10.3 12 5
1990 7.0 34 6.5 9.2 11.8 14 5
1991 10.7 12.5 14 5
1992 5.0 10.8 12.3 14 5
1993 37 6.5 2 9.5 11.1 14 5
1994 37 6.5 8.0 9.1 10 3
1995 2.9 35 6.6 4.0 10.3 11.0 12 4
1996 2.5 35 6.5 7.0 2 9.9 12.3 14 5 1.6 1.75 1.9
1997 8.3 10.8 12 6
1998 39 6.7 10.2 12.8 15 5
1999 9.9 10.8 12 2
2001 2.7 38 6.6 3.0 11.4 12.3 14 4 9.9 9.90 9.9
2002 3.2 39 6.4 10.0 11.6 13 3
2003 2.6 44 6.7 10.0 11.1 12 3
2004 2.4 40 6.7 9.3 10.0 11 3
2005 2.6 36 6.6 10.0 11.1 13 4
2006 2.3 35 6.0 5.0 8.4 9.7 11 6 0.8 0.80 0.8
2007 3.5 2.5 41 6.4 1.5 9.1 10.8 12 6 1.1 1.40 1.7
2008 3.0 2.5 37 6.3 3.0 6.9 9.8 13 5 0.9 1.20 1.5
2009 5.0 2.7 34 6.3 3.0 7.9 9.1 12 6 1.0 1.50 2.0
2010 3.5 2.8 36 6.3 3.5 9.1 10.5 12 7 1.1 1.10 1.1
2011 4.0 2.9 35 6.4 4.5 9.2 10.9 13 6 1.2 1.35 1.5
2012 3.5 3.2 37 6.3 2.0 9.1 10.9 13 6 0.5 0.63 0.9
2013 3.5 3.2 32 6.7 3.0 10.4 11.4 13 6 0.5 0.85 1.2
2014 3.5 3.4 35 6.0 3.0 9.8 10.8 12 6 1.1 1.35 1.6
2015 2.0 3.1 31 6.8 2.5 10.5 12.1 14 6 1.6 1.60 1.6
2016 3.0 3.3 34 6.2 2.2 10.0 12.6 14 7 0.6 0.80 1.0
2017 2.0 3.1 34 6.3 3.0 7.6 11.6 14 6 0.7 0.95 1.2

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
3.3 3.2 36 6.4 3.4 2 4.5 6.9 11 15 4.9 0.5 1.8 9.9

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2014-09-17
2015-08-18
2015-09-15
2016-08-16
2016-08-23
2016-09-26
2017-08-29
2017-09-18
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 19 9.1 25 8.4 22 8.6 23 8.5 22.6 8.7 19 9.0 22 8.7 21 9.0
1 19 9.0 25 8.4 22 8.6 23 8.5 22.7 8.7 19 9.0 22 8.7 20 9.0
2 18 9.0 24 8.4 22 8.6 23 8.5 22.6 8.7 19 9.0 22 8.7 20 8.9
3 18 9.0 24 8.6 22 8.6 23 8.5 22.6 8.7 19 9.0 22 8.7 20 8.9
4 18 9.0 23 8.6 22 8.6 23 8.5 22.6 8.6 19 9.0 22 8.6 20 8.9
5 18 9.0 23 8.7 22 8.6 23 8.5 22.6 8.6 19 9.0 22 8.6 20 8.9
6 18 9.0 23 8.7 21 8.6 23 8.5 22.5 8.6 19 9.0 22 8.6 20 8.9
7 18 9.0 22 8.7 21 8.6 23 8.5 22.5 8.6 19 8.9 22 8.6 20 8.9
8 18 9.0 22 8.8 21 8.6 23 8.5 22.5 8.6 19 8.9 22 8.6 20 8.9
9 18 9.1 22 8.8 21 8.5 23 8.4 22.5 8.6 19 8.9 22 8.6 20 8.9
10 18 9.0 21 8.8 21 8.5 22 8.8 22.5 8.5 19 8.9 21 8.6 19 8.8
11 18 9.0 18 9.2 21 8.5 19 9.5 22.4 8.5 19 8.9 21 8.5 19 8.7
12 18 8.9 16 8.9 19 8.2 16 9.3 19.3 9.2 19 8.9 19 8.5 19 8.6
13 18 9.0 16 8.3 17 7.4 15 8.9 16.8 9.2 19 8.9 17 7.9 19 8.5
14 18 8.8 15 8.0 16 6.9 14 8.5 15.5 8.7 19 8.9 14 7.5 19 8.3
15 14 7.1 15 7.8 16 6.5 14 8.4 14.5 8.6 19 8.8 14 7.3 18 8.1
16 13 6.5 15 7.6 16 6.4 14 8.2 13.9 8.8 18 8.3 14 7.0 18 7.7
17 13 6.3 15 7.3 15 6.0 13 8.0 13.0 8.5 14 6.8 13 6.8 15 6.5
18 12 5.7 15 6.9 15 5.6 13 7.8 12.1 8.1 14 5.7 13 6.4 14 5.9
19 12 5.3 14 6.8 15 5.2 13 7.5 11.4 7.8 13 4.9 13 6.3 13 5.6
20 12 5.1 14 6.6 15 4.7 13 7.5 11.0 7.6 13 4.6 13 6.1 13 5.5
21 12 4.8 14 6.4 15 4.6 13 7.3 13 4.2 13 6.1 13 4.9
22 12 4.7 14 6.3 15 4.4 13 7.3 10.3 6.9 13 3.9 13 6.1 13 4.7
23 12 4.6 14 6.3 14 4.3 13 7.2 13 3.6 13 6.0 13 4.6
24 12 4.4 14 6.2 14 4.2 13 7.1 10.0 6.5 13 3.4 13 6.0 12 4.3
25 12 4.4 14 6.1 13 7.1 13 3.3 13 6.0 12 4.2
26 12 4.2 14 5.9 13 7.1 9.8 6.1 13 3.2 13 6.0 12 4.1
27 12 0.1 13 7.0 13 3.2 13 5.9 12 4.0
28 13 7.0 9.8 5.9 12 5.8 12 4.0
29 13 6.9 12 3.8
30 9.7 5.7 12 3.8
31
32
33
34
35 9.7 5.1

Recent temperature and dissolved oxygen profile plots

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