Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
DEDHAM HANCOCK 24 1 0.52 flushes/yr 159 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
52 m
(170 ft) 		11 m
(35 ft) 		1,209 ha
(2,989 ac) 		131,000,000 m3
(106,203 ac-ft) 		55 km2
(21 mi2)

Secchi Disk Transparency Graphs

Graph Legend: Secchi symbols = average Secchi Disk Transparency Values; tick marks = maximum and minimum values for each year.

## [1] "No 2018 Secchi Disk Transparency Data"

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
1976 7.0 29 13 7.0 7.2 7.5 1 2.2 2.2 2.2
1981 6.0 6.2 6.5 2
1985 6.1 7.7 8.8 4
1986 3.3 20 1 5 4.9 5.5 7.0 5
1987 5.6 6.9 8.0 5
1988 4.6 6.0 8.5 5
1989 4.0 5.4 6.0 5
1990 6.0 7.4 8.0 2
1991 5.0 27 6.6 4 5.9 6.4 7.6 2 1.5 1.5 1.5
1993 6.0 6.7 7.5 5
1996 6.7 7.3 8.1 4
1997 6.7 8.3 9.8 6
1998 6.8 8.3 9.5 5
1999 5.0 30 5 7.4 8.0 8.9 6 2.6 2.6 2.6
2000 6.6 8.1 9.3 7
2001 7.2 8.2 9.6 6
2002 7.0 8.4 9.9 8
2003 6.6 8.0 9.1 6
2004 6.7 8.1 9.9 6
2005 5.7 6.8 7.4 6
2006 4.8 6.9 8.8 8
2007 4.1 6.8 8.8 5
2008 6.5 7.1 7.7 5
2009 5.7 6.9 7.9 4
2010 5 7.6 8.3 9.1 4
2011 7.3 8.1 8.8 3 4
2012 7.6 8.4 8.8 3
2013 6.0 6.7 8.2 2
2014 9.2 9.4 9.7 2
2015 8 6.0 28 6.9 3 9.5 9.7 10.0 1 1.0 1.0 1.0

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
8 5.3 27 6.7 5.2 5 5 4 7.4 10 4.4 1 1.8 2.6

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2011-08-02
2011-08-22
2012-08-10
2012-08-29
2013-08-13
2013-08-30
2014-09-06
2015-08-17
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 24 8.5 22 8.2 25 7.3 23 7.8 22.9 7.2 22.4 7.3 23 8.3 26 8.4
1 24 8.5 22 8.1 25 7.5 23 7.9 22.9 7.4 22.3 7.1 23 8.3 26 8.4
2 24 8.7 22 8.1 24 7.5 23 7.8 22.7 7.5 22.0 6.8 22 8.3 25 8.5
3 24 8.5 22 8.2 24 7.5 23 7.8 22.6 7.6 21.9 6.4 22 8.3 25 8.6
4 24 8.5 22 8.1 24 7.5 23 7.9 22.5 7.5 21.8 6.3 22 8.3 24 8.6
5 23 8.4 22 8.1 24 7.5 23 7.9 21.8 7.4 21.8 6.1 22 8.2 23 8.5
6 22 8.2 22 8.0 23 7.1 23 7.8 21.7 7.4 21.8 6.8 22 8.0 23 8.3
7 21 7.8 22 8.1 21 6.4 23 7.8 21.7 7.3 21.8 5.9 22 7.8 23 8.2
8 17 7.0 22 8.1 17 5.6 23 7.9 17.0 5.8 18.1 5.2 21 7.3 20 7.4
9 16 7.0 18 5.6 15 5.5 18 5.0 14.1 5.4 16.0 4.3 20 6.4 19 6.6
10 15 6.7 16 5.1 14 5.3 15 4.5 13.1 5.2 14.5 4.3 17 4.3 17 5.9
11 14 6.6 15 4.9 14 5.1 14 4.3 12.9 5.2 13.5 4.2 16 3.9 16 5.7
12 14 6.7 14 4.8 13 5.1 14 4.4 12.2 5.3 13.0 4.1 15 3.8 15 5.6
13 13 6.8 13 4.9 13 5.2 13 4.3 11.4 5.5 12.3 4.1 13 3.9 14 5.8
14 12 7.1 13 5.1 12 5.2 12 4.5 11.0 5.7 11.7 4.3 13 4.2 14 5.8
15 11 7.4 12 5.4 12 5.4 12 4.8 10.4 5.9 10.9 4.9 12 4.6 13 6.0
16 11 7.4 11 5.9 11 5.8 12 5.1 10.3 5.8 11 5.1
17 11 7.5 11 5.8 11 5.7 11 5.2 10 5.2 11 6.2
18 10 7.4 11 5.8 11 5.7 11 5.1 10 5.0
19 10 7.3 10 5.6 11 5.7 11 5.0 11 6.1
20 10 7.2 10 5.5 11 5.5 11 4.8 9.7 5.9 9.7 3.8
21 10 7.0 10 5.5 10 5.2 11 4.7 9.6 5.6 9.7 3.6 10 5.9
22 10 6.8 10 4.9 10 1.0 9.5 4.2
23 10 1.2 10 5.4
24 10 5.3

Most recent temperature and dissolved oxygen profile plots

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