Data period: through 2017

Town County Delorme Map # True Basin Flushing Rate
DEDHAM HANCOCK 24 1 0.52 flushes/yr
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 2017 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
1982 5.6 5.9 6.1 3
1983 5.3 6.0 6.7 6
1985 6.5 7.4 8.5 4
1986 4.9 5.4 6.9 5
1987 5.7 6.9 8.0 4
1988 4.8 6.2 7.7 5
1989 3.4 4.9 6.4 5
1990 4.9 5.3 5.9 3
1991 4.3 5.5 7.0 5
1993 5.5 6.6 7.5 5
1996 3.8 5.2 8.1 3
1997 4.8 6.6 8.7 5
1998 6.2 7.9 8.8 5
1999 5.0 30 4 9 6.9 8.1 9.3 6 2.7 2.7 2.7
2000 6.8 8.2 9.3 9
2001 6.7 8.0 9.8 6
2002 7.0 8.3 9.5 5
2003 3.7 6.4 7.6 8.9 7
2004 6.7 8.0 9.5 7
2005 4.7 5.5 6.6 8.0 6
2006 22 4.2 29 6.8 4.6 4.8 6.6 8.4 7
2007 3.5 5.4 6.9 8.7 5
2008 12 4.1 28 6.7 3.0 6.2 6.8 8.5 4
2009 4.2 4.5 6.2 7.8 4
2010 4.0 7.4 8.2 9.1 6
2011 7.6 8.1 8.7 3 2
2012 6.6 7.8 9.0 3
2013 6.4 7.3 8.1 3
2014 8.8 9.1 9.2 2 2
2015 8 6.0 28 6.9 5 6 10.2 10.2 10.2 1 3.7 3.7 3.7

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
14 4.8 29 6.8 4.5 4 7.5 3.4 7.1 10 4.7 2.7 3.2 3.7

Most recent late summer temperature and dissolved oxygen profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2011-09-27
2012-08-10
2012-08-29
2012-09-20
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 22 8.8 25 7.8 24 7.7 19 9.3 22 8.8 22 8.9 23 8.2 27 8.4
1 20 8.6 25 7.8 23 7.8 19 9.2 22 8.8 22 8.7 23 8.3 26 8.4
2 20 8.7 25 7.8 23 7.8 19 9.1 22 8.6 22 9.5 22 8.3 25 8.5
3 20 8.5 25 7.8 23 7.8 19 9.1 22 8.7 22 9.5 22 8.2 24 8.6
4 20 8.6 24 7.7 23 7.7 19 9.0 22 8.7 22 9.5 22 8.2 24 8.6
5 20 8.5 24 7.6 23 7.8 18 9.3 22 8.6 22 9.5 22 8.2 23 8.4
6 19 8.5 23 7.3 23 7.8 18 9.0 21 8.6 22 9.5 22 8.1 23 8.3
7 19 8.2 20 6.6 23 7.8 18 9.2 20 8.0 22 9.4 22 8.1 22 8.1
8 18 7.8 17 6.0 23 7.7 18 9.0 17 6.8 17 7.0 21 7.3 21 7.2
9 15 5.5 17 4.8 18 8.9 15 6.3 15 6.1 19 6.0 18 6.2
10 18 7.8 14 5.0 16 4.4 18 8.9 14 6.1 14 5.7 17 4.4 17 5.9
11 18 7.7 14 5.0 15 4.1 18 8.5 14 6.1 13 5.3 16 3.8 16 5.3
12 18 7.2 13 4.7 14 3.9 15 3.6 13 6.0 13 5.2 15 3.2 15 5.0
13 16 3.1 13 4.0 13 2.8 13 2.3 12 5.0 12 4.0 13 1.5 14 4.1
14 13 0.7 12 3.6 12 2.2 13 1.2 11 4.2 12 3.2 12 0.6 14 3.3
15 12 0.2 12 3.4 12 2.0 12 0.9 11 3.8 11 2.5 12 0.3 13 2.5
16 12 0.0 12 3.4 12 1.8 12 0.7 11 2.4 12 0.2 13 2.2
17 12 0.0 12 3.4 12 1.6 12 0.1 13 1.9
18 12 0.0 12 3.3 11 3.2 11 0.0 13 1.8
19 12 3.2
20 12 2.8

Recent temperature and dissolved oxygen profile plots

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