Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
MOUNT DESERT HANCOCK 16 1 1.5 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
6 m
(19 ft) 		3 m
(10 ft) 		17 ha
(42 ac) 		492,836 m3
(400 ac-ft) 		1 km2
(0.4 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
1983 9.0 8.0 4.0 4.7 5.5 4 2 3.8 3.8 3.8
1991 9.0 37 6.4 10.0 4.5 4.5 4.5 1 1 4.3 4.3 4.3
1993 4.2 4.4 4.6 3 4
1995 4.0 36 5.9
2005 0.2 36 6.1
2008 1.7 57 6.1 7.5 3.5 4.3 5.0 5 4.9 5.0 5.2
2011 2.1 47 6.0 12.0 9 3.2 3.9 4.6 6 1.1 3.8 6.6
2012 18 2.5 40 6.2 7.0 4.8 4.8 4.8 1 1 2.8 2.8 2.8
2014 2.3 45 6.1 9.5 4.8 4.8 4.8 1 2 1.7 5.0 8.4
2017 2.1 40 6.2 7.0 5.0 5.1 5.2 6 8 2.9 3.8 4.8

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
18 3.7 42 6.1 8.7 9 3.2 4.6 5.5 3.4 1.1 4.1 8.4

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2011-08-22
2011-09-29
2012-09-17
2014-08-21
2014-08-26
2014-09-22
2017-08-31
2017-09-22
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 25 8.3 20 8.7 20 8.7 24 8.3 18 9.1 22 8.2 21 8.4
1 24 8.4 20 8.7 20 8.6 24 8.3 18 9.1 22 8.2 21 8.4
2 24 8.5 20 8.7 20 8.6 22 8.4 22 8.2 17 9.0 22 8.1 21 8.4
3 23 8.2 19 8.3 20 8.5 21 7.4 21 6.7 17 8.7 22 8.1 20 8.4
4 21 4.3 17 6.1 19 8.4 20 4.7 20 2.3 17 8.7 21 8.1 20 8.4
5 18 0.1 18 0.4 17 0.2 18 0.2 16 8.0 20 8.3

Recent temperature and dissolved oxygen profile plots

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