Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
TREMONT HANCOCK 16 1 1.92 flushes/yr
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
13 m
(44 ft) 		4 m
(13 ft) 		96 ha
(237 ac) 		3,890,737 m3
(3,154 ac-ft) 		8 km2
(2.9 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 4.5 40 7.0 10.0 5.5 6.5 8.0 3 2.3 2.3 2.3
1982 5.5 5.5 5.5 2
1983 5.0 5.7 7.0 3
1984 5.8 7.1 9.0 6
1985 2.7 38 4.0 5.5 6.2 7.0 5
1986 5.5 6.0 7.0 3
1987 5.5 7.3 8.7 3
1988 6.7 7.9 8.5 6
1989 9 3.4 6.2 8.8 5 5.0 5.0 5.0
1990 10.0 38 6.7 6.0 6.1 7.4 8.3 5
1991 6.2 7.7 10.2 5
1992 2.3 6.2 8.9 6
1993 5.4 6.6 8.2 3
1995 3.9 40 6.4 6.0 13.0 6.7 7.7 9.0 5 1.5 1.5 1.5
1996 3.3 43 6.4 3.0 3.0 6.0 7.2 9.1 5 3.4 3.4 3.4
1997 43 6.5 4.0 7.1 8.3 9.4 5 2.4 2.8 3.2
1998 44 6.4 6.0 6.4 8.2 10.0 4 2.5 2.7 2.9
1999 44 6.7 6.7 7.4 8.9 5
2000 48 6.4 6.0 6.1 6.5 6.8 5 2.5 2.8 3.2
2001 5.0 48 6.5 4.5 6.7 7.5 8.4 4 1.2 2.5 3.9
2002 3.0 51 6.1 9.0 4.8 6.4 8.6 5 1.8 1.8 1.8
2003 4.1 54 6.6 7.5 5.2 6.7 7.8 5 2.1 2.5 2.9
2004 3.4 55 6.8 5.0 5.1 6.2 7.0 5 2.6 2.6 2.6
2005 16 2.9 41 6.5 7.0 5.3 6.0 7.0 4 2.8 3.2 3.6
2006 3.1 41 6.1 4.0 4.5 6.5 7.9 7 2.0 3.0 3.9
2007 12 3.0 44 6.5 5.0 6.1 7.3 8.3 5 2.3 2.4 2.4
2008 23 2.8 50 6.3 5.0 4.4 6.0 7.4 6 2.7 2.8 2.9
2009 18 3.0 43 6.2 6.5 3.9 5.6 7.7 6 3.0 3.8 4.7
2010 17 3.1 42 6.3 5.0 5.7 6.2 7.0 6 2.9 4.8 6.7
2011 10 3.9 48 6.3 6.5 5.0 5.9 6.8 6 3.1 3.6 4.2
2012 13 4.1 50 5.9 4.3 8.0 3.5 6.0 6.9 6 2.1 2.3 2.5
2013 20 3.8 45 6.6 5.0 4.7 6.1 7.1 6 2.7 3.2 3.8
2014 22 3.8 46 6.3 6.0 5.4 6.1 7.0 6 2.6 4.1 5.6
2015 8 3.8 44 6.7 4.0 4.9 7.2 8.8 6 3.2 3.2 3.2
2016 8 4.1 53 6.1 5.2 8.5 6.2 7.1 8.7 7 2.6 3.2 3.5
2017 9 3.9 51 6.4 6.5 5.2 6.9 9.2 6 3.6 4.2 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
15 3.9 46 6.4 5.5 8.5 9 2.3 6.7 10 5 1.2 3.1 6.7

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2014-09-22
2015-08-25
2015-09-17
2016-08-17
2016-08-24
2016-09-21
2017-08-28
2017-09-27
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 17 9.1 25 8.4 23 8.5 24 8.1 24 8.3 21 8.7 23 8.5 22 8.8
1 17 9.1 25 8.4 22 8.6 24 8.1 24 8.3 21 8.6 23 8.5 22 8.7
2 17 9.1 25 8.4 22 8.4 24 8.1 24 8.3 21 8.5 22 8.4 22 8.8
3 17 9.1 25 8.4 22 8.4 24 8.0 23 8.2 21 8.5 22 8.4 21 8.8
4 17 9.1 25 8.4 21 8.1 24 8.0 23 8.1 21 8.5 22 8.5 20 8.6
5 17 9.1 24 7.2 21 8.1 24 7.5 23 8.1 20 8.3 22 8.2 20 7.8
6 17 9.1 22 4.4 21 7.9 24 7.1 23 7.8 20 8.2 22 8.1 20 7.6
7 17 9.1 21 3.6 21 7.8 24 6.7 23 7.8 20 8.3 21 6.4 20 7.3
8 17 9.0 18 0.8 21 7.4 21 2.8 22 7.0 20 8.0 20 4.4 19 7.0
9 17 9.0 17 0.3 20 5.1 17 1.3 17 0.5 20 8.0 15 0.2 19 6.2
10 16 8.8 14 0.1 15 0.3 15 0.4 15 0.3 20 6.7 14 0.2 17 2.4
11 16 8.1 14 0.1 14 0.2 15 0.2 14 0.2 15 0.5 13 0.1 14 0.4
12 16 7.5 14 0.1 14 0.2 14 0.2 14 0.2 14 0.3 13 0.1 13 0.2
13 13 0.1 14 0.1 14 0.1 13 0.1

Recent temperature and dissolved oxygen profile plots

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