Data period: through 2018

Town County Delorme Map # True Basin Flushing Rate Elevation
POLAND ANDROSCOGGIN 5 1 0.95 flushes/yr 306 ft
Maximum Depth Average Depth Surface Area Lake Volume Drainage Area
20 m
(66 ft)
9 m
(30 ft)
156 ha
(385 ac)
14,105,577 m3
(11,436 ac-ft)
13 km2
(5 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
1974 12.0 4.4 4.4 4.4 1
1980 4.5 6.0 6.7 4 1
1985 9.0 38 5.0 7.5 5.0 5.8 8.2 5
1986 8.5 20 8.0 12.0 5.0 5.4 6.0 5
1987 4.5 5.4 6.5 4
1988 12.5 6.2 10.0 4.0 6.0 7.5 6
1989 11.3 3.8 4.5 5.1 5
1990 8.0 10.0 5.0 5.6 6.7 6
1991 13.0 44 7.0 9.5 4.0 5.4 7.0 6
1992 13.9 6.5 11.7 17.0 4.2 5.2 6.0 5
1993 13.5 7.6 10.3 5.0 6.1 7.0 5 3.2 3.2 3.2
1994 11.0 6.4 8.7 15.0 3.9 5.5 7.2 4
1995 9.8 6.9 7.5 13.0 5.4 6.1 6.8 5
1996 10.0 7.3 7.0 11.0 4.7 5.8 7.4 6
1997 9.8 7.0 8.5 15.0 4.6 5.7 6.5 5 4.8 6.1 7.3
1998 10.0 7.1 11.0 9.0 4.1 6.1 8.1 5 6.4 6.4 6.4
1999 12.8 44 7.0 8.5 9.0 5.0 7.0 8.3 5 3.7 3.7 3.8
2000 12.0 7.1 9.5 9.0 4.2 5.8 7.6 6 3.0 3.7 4.4
2001 11.5 6.8 8.0 11.0 5.2 6.6 8.2 10 2.5 2.9 3.3
2002 11.0 6.9 8.0 12.0 5.4 7.0 8.1 6 3.6 3.6 3.7
2003 15.5 7.1 8.0 9.0 4.2 6.4 8.2 5 3.9 4.1 4.3
2004 13.5 7.0 6.0 10.0 5.8 6.8 7.8 6 2.0 3.0 4.1
2005 12.0 53 6.8 8.5 5.3 6.6 7.3 6 3.3 3.5 3.8
2006 13.8 7.4 8.0 12.0 5.2 6.2 7.2 6 4.2 5.2 6.1
2007 12.8 6.7 6.5 5.4 7.1 8.8 5 3.3 3.5 3.8
2008 7.0 5.5 10.0 5.2 6.7 7.3 6 2.4 3.0 3.5
2009 8.0 5.2 7.0 7.9 5 1 3.7 3.7 3.7
2010 5.0 5.9 7.0 7.8 5 2.7 2.7 2.7
2011 79 6.0 6.1 7.1 7.9 6 3.8 3.8 3.8
2012 14 12.7 60 7.3 8.0 6.4 4.8 6.1 7.1 6 5.8 5.8 5.8
2013 7.0 9.0 6.0 6.8 7.7 8
2014 14.0 69 6.0 4.8 6.5 7.9 9 3.6 3.6 3.6
2015 18 15.0 68 7.2 7.5 10.5 6.3 7.2 8.2 8 5.0 5.1 5.2
2016 14.0 72 7.4 6.0 10.0 6.6 7.6 8.2 10 1.6 2.2 2.9
2017 12.5 93 7.5 6.0 7.0 5.4 6.4 7.5 6 4.3 4.3 4.3
2018 9 14.0 86 7.5 6.0 14.0 6.0 7.0 8.2 7 3.0 3.5 4.0

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
14 12 60 7 7.7 6.4 11 3.8 6.2 8.8 5.8 1.6 3.9 7.3

Temperature and Dissolved Oxygen Profiles

Late summer only; limited to eight most recent profiles

Units: Temperature (TEMP) = °C; Dissolved Oxygen (DO) = mg/L
2014-08-09
2015-08-10
2015-08-26
2016-08-26
2017-08-02
2017-09-12
2018-08-02
2018-09-05
Depth (m) TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO TEMP DO
0 25.1 8.3 25.6 8.4 26.5 8.3 25.1 8.4 26.2 8.3 20.7 8.9 26.6 8.0 25.7 8.2
1 24.7 8.4 25.3 8.4 25.9 8.4 25.2 8.4 25.4 8.4 20.3 8.9 26.5 8.0 25.5 8.2
2 24.5 8.4 24.9 8.5 25.5 8.5 24.9 8.4 25.0 8.4 20.1 8.9 26.2 8.0 25.3 8.2
3 24.4 8.4 24.8 8.5 25.3 8.5 24.7 8.4 24.8 8.5 20.1 8.9 26.1 8.0 25.2 8.2
4 24.3 8.3 24.6 8.5 25.1 8.4 24.6 8.3 24.3 8.4 20.0 8.8 26.1 8.0 24.7 8.2
5 23.6 7.8 24.5 8.3 24.3 8.7 24.3 8.3 22.9 8.7 19.9 8.7 24.0 8.3 24.4 8.1
6 17.5 10.4 19.9 11.1 21.9 9.7 23.6 8.2 18.4 11.0 19.5 8.5 19.3 10.6 21.4 10.1
7 12.9 10.3 15.4 12.0 17.5 11.2 20.6 9.2 12.6 9.9 18.6 8.2 13.8 12.8 17.2 12.4
8 10.6 9.0 11.3 10.9 12.4 9.6 14.9 8.3 10.0 7.5 13.3 7.3 10.7 13.4 11.4 10.8
9 8.8 8.0 9.2 9.6 10.0 7.9 11.9 7.0 8.5 6.3 9.6 5.0 8.4 9.2 9.3 7.8
10 8.0 7.7 8.2 8.3 8.6 7.6 10.0 5.8 7.8 6.1 8.1 4.4 7.2 7.8 7.8 6.4
11 7.3 7.5 7.5 7.4 7.9 7.9 9.2 5.2 6.9 6.3 7.1 3.9 6.6 7.3 6.7 4.8
12 7.0 7.4 6.7 6.2 7.1 6.1 8.5 5.1 6.5 5.5 6.7 4.1 5.9 6.7 6.3 4.7
13 6.6 6.2 6.5 6.2 6.7 5.2 8.3 4.8 6.1 5.8 6.2 3.3 5.6 6.3 5.7 4.3
14 6.5 5.8 6.3 5.0 6.4 4.5 8.0 4.5 5.8 5.5 6.0 3.3 5.3 6.2 5.5 3.9
15 6.3 4.9 6.2 4.7 6.2 3.7 7.7 3.0 5.5 5.1 5.9 2.9 5.2 5.2 5.3 2.6
16 6.2 3.6 6.1 3.8 6.1 2.5 7.4 2.1 5.4 4.0 5.6 2.0 5.0 4.5 5.1 1.7
17 6.2 2.9 6.0 3.2 6.1 1.8 7.4 1.6 5.3 3.2 5.5 1.5 5.0 2.8 5.1 1.1
18 6.1 2.7 6.0 2.4 6.1 1.6 7.4 1.7 5.3 2.4 5.5 1.1 5.0 1.9 5.1 0.5
19 6.1 2.6 6.0 2.1 6.0 1.2 7.3 1.4 5.3 2.4 5.5 0.7 4.9 1.2 5.1 0.2
20 6.0 2.0 7.2 0.9 5.3 2.3 5.0 0.2
21 5.9 1.0 5.0 0.1

Most recent temperature and dissolved oxygen profile plots

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