Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
MANCHESTER KENNEBEC 12 1 1.24 flushes/yr 171 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
23 m
(75 ft)
9 m
(30 ft)
38 ha
(94 ac)
3,517,803 m3
(2,852 ac-ft)
8 km2
(3.2 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
1978 8.0 7 3.4 3.4 3.5 2 2.9 2.9 2.9
1980 12.0 3.6 3.6 3.6 1
1997 8.5 36 7.2 8.0 22 4.4 4.4 4.4 1 5.3 5.3 5.3
1998 10.0 5.3 5.3 5.4 1 4.7 4.7 4.7
1999 6.0 6.2 6.2 6.3 1 3.1 3.1 3.1
2000 13.5 6.8 11.0 4.2 5.0 5.7 6 4.6 4.6 4.6
2001 14.5 6.9 7.0 5.0 5.8 6.8 5 2.3 2.3 2.3
2002 3.7 5.6 7.1 6
2003 8.5 6.7 5.0 6.4 7.2 7.7 5 1.8 1.8 1.8
2004 10.0 6.7 6.0 5.0 5.7 6.6 6 9.7 9.7 9.7
2005 6.0 3.8 4.9 5.6 4 3.6 3.6 3.6
2006 41 8.6 33 6.9 10.0 3.8 4.4 4.8 4
2007 10.0 6.7 5.0 4.8 5.7 6.8 5 2.9 2.9 2.9
2008 10.0 6.4 7.0 5.5 6.1 6.8 6 3.9 3.9 3.9
2009 10.1 11.0 3.5 3.8 4.0 5 5.3 5.3 5.3
2010 10.4 6.2 5.8 6.3 6.9 6 0.9 1.8 2.6
2011 9.5 9.8 3.4 4.9 6.0 4 1.9 3.9 6.1
2012 4.7 5.3 6.2 4
2013 10.5 4.4 4.9 5.3 4
2014 9.7 9.8 3.9 5.2 5.9 6 1.8 2.7 3.2
2015 5.0 6.1 7.0 6
2016 4.9 6.3 7.6 6 2.5 3.4 4.2
2017 10.3 8.5 29 4.8 6.3 7.4 6 2.4 3.5 4.2
2018 24 10.2 42 6.9 8.0 32 5.4 6.5 7.7 7 2.0 3.4 5.0

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
32 10 37 6.8 8.1 7 28 3.4 5.4 7.7 4.5 0.9 3.8 9.7

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2014-08-14
2014-09-15
2015-08-24
2016-08-15
2017-08-22
2018-08-23
2018-08-30
2018-09-13
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 24.3 8.0 20.0 8.7 26.0 7.6 25.5 8.0 24.6 8.2 23.8 8.6 26.4 8.5 22.6 8.3
1 23.3 8.0 19.6 8.7 25.1 7.7 25.4 7.9 24.2 8.4 23.8 8.5 26.4 8.5 21.8 8.4
2 21.3 8.2 19.0 8.7 24.9 7.7 24.7 7.9 24.2 8.4 23.8 8.6 25.3 8.6 21.5 8.3
3 20.1 8.5 18.9 8.7 24.8 7.6 24.3 7.9 22.6 8.3 23.7 8.6 24.5 8.5 21.3 8.4
4 20.1 8.6 16.1 6.9 19.4 9.3 20.9 11.2 16.3 8.9 28.5 13.7 22.4 10.4 21.0 8.4
5 18.1 8.5 11.2 8.4 13.5 9.2 14.0 12.1 10.3 8.7 12.6 11.6 15.3 11.1 14.1 9.4
6 14.6 9.2 8.4 8.0 9.3 8.7 9.8 9.6 7.2 8.4 8.1 8.9 9.2 8.0 9.2 7.5
7 9.4 9.3 6.6 7.7 7.2 8.4 7.8 9.1 6.0 8.2 6.0 8.1 7.3 7.2 6.5 6.8
8 6.9 8.3 5.6 7.7 6.1 8.4 6.8 8.7 5.2 8.3 5.1 8.1 5.7 7.0 5.3 6.9
9 6.0 8.0 5.2 7.5 5.5 8.2 6.3 8.7 4.9 8.0 4.7 7.8 4.9 6.7 4.8 6.9
10 5.2 7.9 5.0 7.0 5.1 8.2 5.9 8.9 4.6 7.7 4.4 7.7 4.7 6.5 4.4 6.7
11 5.0 7.6 4.7 6.8 4.9 8.1 5.6 8.9 4.4 7.3 4.2 7.5 4.4 6.2 4.2 6.3
12 4.8 7.3 4.6 6.7 4.7 7.9 5.5 8.8 4.3 7.0 4.1 7.1 4.3 5.8 4.1 5.8
13 4.6 7.1 4.6 6.7 4.6 7.8 5.4 8.8 4.3 6.8 4.0 6.5 4.2 5.4 4.1 5.5
14 4.6 6.9 4.5 6.4 4.5 7.5 5.3 8.5 4.2 6.4 4.0 6.1 4.2 4.9 4.1 5.0
15 4.5 6.9 4.5 6.2 4.5 7.3 5.3 8.3 4.2 5.8 4.0 5.7 4.2 4.6 4.1 4.7
16 4.5 6.1 4.4 7.3 5.3 8.2 4.2 5.4 4.0 5.1 4.1 4.3
17 4.4 6.5 4.4 5.8 4.4 7.0 5.2 7.8 4.2 5.0 4.0 4.6 4.1 3.8 4.0 4.0
18 4.4 5.2 4.4 6.7 5.2 7.6 4.2 4.5 4.0 4.0 4.0 3.0
19 4.3 5.9 4.4 4.2 4.3 6.4 5.1 6.8 4.2 3.6 3.9 3.1 4.1 2.5 4.0 1.3
20 4.4 2.9 4.3 5.3 5.1 5.9 4.2 2.2 4.0 0.7 4.1 0.4 4.0 0.6
21 4.3 4.6 4.4 0.9 4.2 4.0 5.1 3.9 4.2 0.2 4.0 0.4 4.1 0.2 4.0 0.4
22 4.4 0.3 4.2 0.8 5.0 2.6 4.2 0.2 4.0 0.4 4.1 0.2 4.0 0.4
23 4.3 0.8 4.4 0.3 4.2 0.6 5.0 0.7 4.2 0.1 4.0 0.4 4.1 0.4
24 4.4 0.3 4.2 0.5 4.9 0.7
25 4.3 0.7

Most recent temperature and dissolved oxygen profile plots

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